Patent application number | Description | Published |
20080233432 | Composition, Method for Fabricating Light-Emitting Element, Light-Emitting Element, Light-Emitting Device, and Electronic Device - Objects of the present invention are to provide a composition in which an organometallic complex is dissolved and a method for fabricating a light-emitting element using the composition, and to provide a light-emitting element, a light-emitting device, and an electronic device each fabricated using the composition in which the organometallic complex is dissolved. The present invention provides a composition that includes a solvent and an organometallic complex including a ligand having a pyrazine skeleton, bonded to a Group 9 or Group 10 element. A method for fabricating light-emitting elements, which is suitable for industrial application, can be realized by the application of the composition of the present invention to fabrication of a light-emitting element. Furthermore, a light-emitting element with high emission efficiency, a light-emitting device and electronic device with low power consumption can be realized by use of the composition. | 09-25-2008 |
20080286445 | COMPOSITION, AND METHOD OF FABRICATING LIGHT-EMITTING ELEMENT - Objects of the present invention are to provide a composition in which an anthracene derivative is dissolved and a technique in which a thin film with favorable properties is formed using the composition by a wet process. Another object of the present invention is to fabricate a highly reliable light-emitting element using the composition at low cost and high productivity. The present invention provides a composition containing a solvent and an anthracene derivative represented by a general formula (1). By use of this composition, a thin film with favorable properties can be formed by a wet process. Accordingly, by use of such a thin film, a highly reliable light-emitting element can be fabricated. | 11-20-2008 |
20080286604 | Organometallic Complex, Composition and Light Emitting Element Including the Organometallic Complex - To provide a novel organometallic complex, and light emitting elements, light emitting devices, and electronic devices which include the organometallic complex. In addition, to provide a composition in which the organometallic complex is dissolved and to provide a method for manufacturing light emitting elements using the composition. An organometallic complex has high solubility in a solvent. In the organometallic complex, the ligand including a pyrazine skeleton is bound to an atom belonging to Group 9 (Co, Rh, or Ir) or an atom belonging to Group 10 (Ni, Pd, or Pt). In addition, the light emission efficiency is high. Therefore, the organometallic complex is preferably used for manufacturing a light emitting element. | 11-20-2008 |
20090072725 | Light-Emitting Element, Light-Emitting Device, and Electronic Device - It is an object to provide a light-emitting element having long lifetime. A light-emitting element is provided, in which a light-emitting layer, a first layer, and a second layer are provided between a first electrode and a second electrode; the first layer is provided between the light-emitting layer and the first electrode; the second layer is provided between the light-emitting layer and the second electrode; the first layer is a layer for controlling the hole transport; the second layer is a layer for controlling the electron transport; and light emission is obtained from the light-emitting layer by applying voltage to the first electrode and the second electrode such that the potential of the first electrode is higher than that of the second electrode. | 03-19-2009 |
20090085474 | Light-Emitting Element, Light-Emitting Device, and Electronic Appliance - In a light-emitting element including an EL layer between a pair of electrodes, between an electrode functioning as an anode and a fourth layer having a light-emitting property (light-emitting layer), the EL layer includes at least a first layer having a hole-injecting property (hole-injecting layer), a second layer having a hole-transporting property (first hole-transporting layer), and a third layer having a hole-transporting property (second hole-transporting layer). The absolute value of the highest occupied molecular orbital level (HOMO level) of the second layer is larger than the absolute value of the highest occupied molecular orbital level (HOMO level) of each of the first layer and the third layer. With such a structure, the rate of transport of holes injected from the electrode functioning as an anode is reduced and emission efficiency of the light-emitting element is improved. | 04-02-2009 |
20090102368 | Light-Emitting Element, Light-Emitting Device, and Electronic Device - In a light-emitting element including an EL layer between a pair of electrodes, a structure is formed in which the EL layer includes at least a first layer having a hole-injecting property (a hole-injecting layer) and a second layer having a hole-transporting property (a hole-transporting layer) between the electrode functioning as an anode and a third layer having a light-emitting property (a light-emitting layer), and the absolute value of the highest occupied molecular orbital level (HOMO level) of the second layer is larger than that of the first layer, so that the injection amount of holes from the electrode side which functions as an anode is suppressed, and thus luminous efficiency of the light-emitting element is increased. | 04-23-2009 |
20090140641 | Quinoxaline Derivative and Light-Emitting Element, Light-Emitting Device, and Electronic Device Using Quinoxaline Derivative - An object is to provide a novel quinoxaline derivative. Another object is to provide a light-emitting element with low driving voltage. Another object is to provide a light-emitting element with low power consumption. Another object is to provide a light-emitting device and an electronic device with low power consumption by using such a light-emitting element. A quinoxaline derivative which has a structure in which at least one of carbon at a 2-position and carbon at a 3-position of quinoxaline, and carbon of 1,3,4-oxadiazole ring are bound via an arylene group is provided. | 06-04-2009 |
20090140642 | Quinoxaline Derivative, and Light-Emitting Element and Electronic Device Using the Same - An object is to provide a novel quinoxaline derivative. Another object is to provide a light-emitting element with low driving voltage and less power consumption. Further, another object is to provide a light-emitting device and an electronic device each consuming less power by using the light-emitting element. A quinoxaline derivative represented by a general formula (G11) is provided, in which at least one of carbon at a 2-position and carbon at a 3-position, and carbon at a 2-position of benzoxazole are bound via an arylene group. | 06-04-2009 |
20090160323 | Carbazole Derivative, and Light-Emitting Element, Light-Emitting Device, and Electronic Device Using Carbazole Derivative - To provide a light-emitting element having high luminous efficiency and to provide a light-emitting device and an electronic device which consumes low power and is driven at low voltage, a carbazole derivative represented by the general formula (1) is provided. In the formula, α | 06-25-2009 |
20090184633 | Quinoxaline Derivative, and Light-Emitting Element, Light-Emitting Device, and Electronic Appliance Using the Quinoxaline Derivative - An object is to provide a novel quinoxaline derivative, a light-emitting element with low driving voltage, and a light-emitting element which consumes low power. Another object is to provide a light-emitting device and an electronic appliance which consume low power by using the above light-emitting element. A quinoxaline derivative represented by a general formula (G11) is provided, in which at least one of carbon at a 2-position and carbon at a 3-position of quinoxaline, and carbon at a 2-position of a 1H-benzimidazole ring are bonded to each other via an arylene group. | 07-23-2009 |
20090203704 | Quinoxaline Derivative, and Light-Emitting Element, Light-Emitting Device, and Electronic Device Using Quinoxaline Derivative - An object is to provide a novel quinoxaline derivative. Another object is to provide a light-emitting element with low driving voltage. Still another object is to provide a light-emitting element with low power consumption. Yet another object is to provide a light-emitting device and an electronic device each having low power consumption by using such a light-emitting element. A quinoxaline derivative is provided which has a structure in which at least one of carbon at a 2-position and carbon at a 3-position of quinoxaline, and carbon of a pyridine ring are bound via an arylene group. | 08-13-2009 |
20090243476 | Acenaphthoquinoxaline Derivative, Light-Emitting Element, Light-Emitting Device, and Electronic Device - An acenaphthoquinoxaline derivative represented by a general formula (G1) is provided. The acenaphthoquinoxaline derivative represented by the general formula (G1) easily receives electrons and has an electron-transporting property. Therefore, the acenaphthoquinoxaline derivative can be suitably used for a light-emitting element. | 10-01-2009 |
20090247753 | Acenaphthopyridine Derivative, Material of Light-Emitting Element, Light-Emitting Element, Light-Emitting Device, and Electronic Appliance - It is an object to provide a new compound which is suitable for a material of an electron-transporting layer of a light-emitting element. In particular, it is an object to provide a compound which can be used for forming a light-emitting element capable of emitting light at a low drive voltage. An acenaphthopyridine derivative represented by the following general formula (G1) is provided. In the formula, Het represents a pyridyl group or a quinolyl group. | 10-01-2009 |
20090253916 | Anthracene Derivative, Light-Emitting Material, Material for Light-Emitting Element, Composition for Coating, Light-Emitting Element, Light-Emitting Device, and Electronic Appliance - A novel anthracene derivative with a large energy gap is provided. An anthracene derivative represented by General Formula (G1) below is provided. In the formula, Ar | 10-08-2009 |
20090267498 | Anthracene Derivative, Light-Emitting Element, Light-Emitting Device, and Electronic Appliance - Novel anthracene derivatives are provided. Further, a light-emitting element, a light-emitting device, and an electronic appliance each using the novel anthracene derivative are provided. Anthracene derivatives represented by general formulae (G11) and (G21) are provided. The anthracene derivatives represented by the general formulae (G11) and (G21) each emit blue light with high color purity and have a carrier-transporting property. Therefore, each of the anthracene derivatives represented by the general formulae (G11) and (G21) is suitable for use in a light-emitting element, a light-emitting device, and an electronic appliance. | 10-29-2009 |
20090317539 | Composition, Method for Manufacturing Thin Film, and Method for Manufacturing Light-Emitting Element - It is an object to provide a composition in which an anthracene derivative is dissolved and a technique in which a thin film that has a favorable film quality is formed by a wet process using the composition. In addition, it is another object to manufacture a highly reliable light-emitting element using the composition at low cost with high productivity. A composition having a solvent and an anthracene derivative having one anthracene structure and one carbazolyl group which is bonded to the anthracene structure directly or through a phenyl group is formed. A thin film with a favorable film quality can be formed by a wet process using the composition. Accordingly, a highly reliable light-emitting element can be manufactured using such a thin film. | 12-24-2009 |
20100001638 | AROMATIC AMINE COMPOUND, AND LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, AND ELECTRONIC APPLIANCE USING THE AROMATIC AMINE COMPOUND - An object of the present invention is to provide a novel aromatic amine compound, and a light-emitting element, a light-emitting device, and an electronic appliance with high luminous efficiency. An aromatic amine compound expressed by General Formula (1) and a light-emitting element, a light-emitting device, and an electronic appliance formed using the aromatic amine compound expressed by General Formula (1) are provided. By the use of the aromatic amine compound expressed by General Formula (1), the light-emitting element, the light-emitting device, and the electronic appliance can have high luminous efficiency. | 01-07-2010 |
20100213457 | Light-Emitting Element, Light-Emitting Device, and Electronic Device - A light-emitting element disclosed in the present invention includes a light-emitting layer and a first layer between a first electrode and a second electrode, in which the first layer is provided between the light-emitting layer and the first electrode. The present invention is characterized by the device structure in which the first layer comprising a hole-transporting material is doped with a hole-blocking material or an organic compound having a large dipole moment. This structure allows the formation of a high performance light-emitting element with high luminous efficiency and long lifetime. The device structure of the present invention facilitates the control of the rate of the carrier transport, and thus, leads to the formation of a light-emitting element with a well-controlled carrier balance, which contributes to the excellent characteristics of the light-emitting element of the present invention. | 08-26-2010 |
20100244673 | Oxadiazole Derivative, and Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device Using Oxadiazole Derivative - An object is to provide a novel oxadiazole derivative represented by General Formula (G1) as a substance having a high electron-transport property. In the formula, Ar | 09-30-2010 |
20100301383 | Light-Emitting Element, Light-Emitting Device, and Method for Manufacturing the Same - An object is to provide a light-emitting element with high emission efficiency. Another object is to provide a light-emitting element with a long lifetime and high reliability. Another object is to provide a light-emitting element driven at low voltage. A first light-emitting layer whose one surface is in contact with a hole-transport layer, and a second light-emitting layer which is in contact with the other surface of the first light-emitting layer and includes a bipolar host material and a light-emitting substance are provided, where the hole-transport property of the first light-emitting layer is higher than that of the second light-emitting layer. A recombination region of holes and electrons is preferably provided in the light-emitting layer. The hole-transport layer preferably includes an anti-reducing substance. | 12-02-2010 |
20100301744 | FLUORENE DERIVATIVE, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - An object is to provide a light-emitting element having high light-emission efficiency by provision of a novel fluorene derivative as represented by General Formula (G1) below. | 12-02-2010 |
20110057178 | Light-Emitting Element, Light-Emitting Device, and Method for Manufacturing the Same - Disclosed is a light-emitting element which includes a first light-emitting layer over and in contact with a hole-transport layer and a second light-emitting layer over and in contact with the first light-emitting layer. The first and the second light-emitting layers contain a bipolar host material and an emissive guest material. The guest material in the first light-emitting layer has a lower ability for capturing a hole than a guest material in the second light-emitting layer; therefore, the hole-transport property of the first light-emitting layer can be controlled to be higher than that of the second light-emitting layer. The difference in hole-transport property between the first and second light-emitting layers allows a recombination region to be widely spread in the light-emitting layers. An anti-reducing material may be provided in the hole-transport layer, which prevents the hole-transport layer from being reduced by electrons which fail to undergo recombination in the light-emitting layers. | 03-10-2011 |
20110121275 | Anthracene Derivative, and Light Emitting Element, Light Emitting Device, and Electronic Device Using the Anthracene Derivative - It is an object to provide a noble anthracene derivative, a light emitting element with a high luminous efficiency, and further a light emitting element with a long lifetime. It is another object to provide a light emitting device and electronic device with a long lifetime by using the light emitting element. An anthracene derivative represented by General Formula (1) is provided. Since the anthracene derivative represented by General Formula (1) has a high luminous efficiency, when the anthracene derivative is used for a light emitting element, the light emitting element can have a high luminous efficiency. Further, when the anthracene derivative represented by General Formula (1) is used for a light emitting element, the light emitting element can have a long lifetime. | 05-26-2011 |
20110127510 | Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - Objects of the present invention are to provide: a light-emitting element having a long lifetime and good emission efficiency and drive voltage. One embodiment of the invention is a light-emitting element including, between an anode and a cathode, at least a stack structure in which a first layer, a second layer, and a light-emitting layer are provided in order from the anode side. The first layer includes a first organic compound and an electron-accepting compound. The second layer includes a second organic compound having a HOMO level differing from the HOMO level of the first organic compound by from −0.2 eV to +0.2 eV. The light-emitting layer includes a third organic compound having a HOMO level differing from the HOMO level of the second organic compound by from −0.2 eV to +0.2 eV and a light-emitting substance having a hole-trapping property with respect to the third organic compound. | 06-02-2011 |
20110196152 | ORGANOMETALLIC COMPLEX, AND LIGHT-EMITTING ELEMENT AND LIGHT-EMITTING DEVICE USING THE SAME - It is an object of the present invention to provide a substance capable of emitting phosphorescence. In addition, it is an object of the present invention to provide a light-emitting element that is excellent in chromaticity. One aspect of the present invention is an organometallic complex having a structure represented by a general formula (1). In the general formula (1), R | 08-11-2011 |
20120061714 | Fluorene Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device, Lighting Device, and Organic Compound - A substance having a hole-transport property and a wide band gap is provided. A fluorene compound represented by a general formula (G1) is provided. In the general formula (G1), α | 03-15-2012 |
20120077987 | ORGANIC COMPOUND, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - A novel substance with which an increase in life and emission efficiency of a light-emitting element can be achieved is provided. A carbazole compound having a structure represented by General Formula (G1) is provided. Note that a substituent which makes the HOMO level and the LUMO level of a compound in which a bond of the substituent is substituted with hydrogen deep and shallow, respectively is used as each of substituents in General Formula (G1) (R | 03-29-2012 |
20120091887 | Carbazole Compound, Material for Light-Emitting Element, Organic Semiconductor Material, Light-Emitting Element - To provide a novel carbazole compound that has an excellent carrier-transport property and can be used for a transport layer or as a host material in a light-emitting element. Further, to provide an organic semiconductor material and a material for a light-emitting element using the carbazole compound. A carbazole compound in which the 4-position of a dibenzothiophene skeleton or a dibenzofuran skeleton is substituted with the 2- or 3-position of a carbazole skeleton directly or via an arylene group can be synthesized. The carbazole compound is found to have a suitable carrier-transport property, a good film quality, and be used suitably as a material of a light-emitting element and an organic semicondcutor material. Note that nitrogen of the carbazole skeleton is substituted with any of a phenyl group, a biphenyl group, and a naphthyl group. | 04-19-2012 |
20120095226 | ORGANOMETALLIC COMPLEX, AND LIGHT-EMITTING ELEMENT AND DISPLAY DEVICE USING THE ORGANOMETALLIC COMPLEX - An object is to provide an organometallic complex whose phosphorescence characteristics can be adjusted by varying the structure of a ligand. Alternatively, an object is to provide an organometallic complex capable of emitting yellow phosphorescence with high luminance. Alternatively, an object is to provide a light-emitting device with high added value. An organometallic complex which has a structure represented by a general formula (G1) below and at least one substituent group represented by a general formula (G2) below as a phenyl group and is formed in such a way that a phenylpyrazine derivative represented by a general formula (G0) below is ortho-metalated by an ion of a Group 9 metal or of a Group 10 metal is provided. Alternatively, a light-emitting element and a light-emitting device formed including the organometallic complex are provided. | 04-19-2012 |
20120098417 | Organometallic Complex, Light-Emitting Element, Light-Emitting Device, Electronic Device and Lighting Device - Provided is a novel substance that can emit phosphorescence. Alternatively, provided is a novel substance with high emission efficiency. An organometallic complex in which a 4-arylpyrimidine derivative is a ligand and iridium is a central metal is provided. Specifically, an organometallic complex having a structure represented by a general formula (G1) is provided. In the general formula (G1), R | 04-26-2012 |
20120104373 | Organometallic Complex, and Light-Emitting Element and Display Device Using the Organometallic Complex - An object is to provide a novel organometallic complex capable of phosphorescence and having high heat resistance. Alternatively, an object is to provide a light-emitting device with high added value. The objects are achieved by providing an organometallic complex which has a structure represented by a general formula (G1) or (G2) below and is formed in such a way that a corresponding one of pyrazine derivatives represented by general formulae (G0) and (G0′) below is ortho-metalated by a Group 9 or Group 10 metal ion, or by providing a light-emitting element and a light-emitting device including the organometallic complex. | 05-03-2012 |
20120193613 | HETEROCYCLIC COMPOUND - Provided is a novel heterocyclic compound which can be used for a light-emitting element, as a host material of a light-emitting layer in which a light-emitting substance is dispersed. A heterocyclic compound represented by a general formula (G1) is provided. In the formula, A represents any of a substituted or unsubstituted dibenzothiophenyl group, a substituted or unsubstituted dibenzofuranyl group, and a substituted or unsubstituted carbazolyl group, R | 08-02-2012 |
20120197020 | HETEROCYCLIC COMPOUND - Provided is a novel heterocyclic compound which can be used for a light-emitting element, as a host material of a light-emitting layer in which a light-emitting substance is dispersed. A heterocyclic compound represented by a general formula (G1) is provided. In the formula, A represents any of a substituted or unsubstituted dibenzothiophenyl group, a substituted or unsubstituted dibenzofuranyl group, and a substituted or unsubstituted carbazolyl group, R | 08-02-2012 |
20120205632 | LIGHT-EMITTING ELEMENT - A light-emitting element having high external quantum efficiency is provided. A light-emitting element having a long lifetime is provided. A light-emitting element is provided which includes a light-emitting layer containing a phosphorescent compound, a first organic compound, and a second organic compound between a pair of electrodes, in which a combination of the first organic compound and the second organic compound forms an exciplex (excited complex). The light-emitting element transfers energy by utilizing an overlap between the emission spectrum of the exciplex and the absorption spectrum of the phosphorescent compound and thus has high energy transfer efficiency. Therefore, a light-emitting element having high external quantum efficiency can be obtained. | 08-16-2012 |
20120205687 | LIGHT-EMITTING BODY, LIGHT-EMITTING LAYER, AND LIGHT-EMITTING DEVICE - An organic light-emitting element having high efficiency and long lifetime is provided. An organic light-emitting body is provided which includes a host having a high electron-transport property (n-type host), a host having a high hole-transport property (p-type host), and a guest such as an iridium complex and in which the n-type host and the p-type host are located so as to be adjacent to each other. When an electron and a hole are injected to such a light-emitting body, the electron is trapped by the n-type host and the hole is trapped by the p-type host. Then, both the electron and the hole are injected to the guest, and thus the guest is brought into an excited state. In this process, less thermal deactivation occurs and the working rate of the guest is high; thus, highly efficient light emission can be obtained. | 08-16-2012 |
20120205702 | Light-Emitting Device - An organic EL light-emitting device with excellent total luminous flux or with reduced emission unevenness and low power consumption is provided. Light from an organic EL layer in a region sandwiched between a light-transmitting conductive film of a lower electrode and a light-reflecting conductive film of an upper electrode is selectively emitted to the lower electrode side, and extracted outside by a first optical structure body. Light from the organic EL layer in a region sandwiched between a light-reflecting conductive film of the lower electrode and a light-transmitting conductive film of the upper electrode is selectively emitted to the upper electrode side, and extracted outside by a second optical structure body. The first optical structure body and the second optical structure body are formed on different planes and can overlap with each other; thus, light from the organic EL layer can be efficiently extracted outside. | 08-16-2012 |
20120206035 | LIGHT-EMITTING ELEMENT - Provided is a light-emitting element with high external quantum efficiency, or a light-emitting element with a long lifetime. The light-emitting element includes, between a pair of electrodes, a light-emitting layer including a guest material and a host material, in which an emission spectrum of the host material overlaps with an absorption spectrum of the guest material, and phosphorescence is emitted by conversion of an excitation energy of the host material into an excitation energy of the guest material. By using the overlap between the emission spectrum of the host material and the absorption spectrum of the guest material, the energy smoothly transfers from the host material to the guest material, so that the energy transfer efficiency of the light-emitting element is high. Accordingly, a light-emitting element with high external quantum efficiency can be achieved. | 08-16-2012 |
20120217487 | Light-Emitting Device - A light-emitting element includes a light-emitting layer including a guest, an n-type host and a p-type host between a pair of electrodes, where the difference between the energy difference between a triplet excited state and a ground state of the n-type host (or p-type host) and the energy difference between a triplet excited state and a ground state of the guest is 0.15 eV or more. Alternatively, in such a light-emitting element, the LUMO level of the n-type host is higher than the LUMO level of the guest by 0.1 eV or more, or the HOMO level of the p-type host is lower than the HOMO level of the guest by 0.1 eV or more. | 08-30-2012 |
20120242219 | LIGHT-EMITTING ELEMENT - A light-emitting element having high external quantum efficiency is provided. A light-emitting element having low drive voltage is provided. Provided is a light-emitting element which includes a light-emitting layer containing a phosphorescent compound, a first organic compound, and a second organic compound between a pair of electrodes. A combination of the first organic compound and the second organic compound forms an exciplex (excited complex). An emission spectrum of the exciplex overlaps with an absorption band located on the longest wavelength side of an absorption spectrum of the phosphorescent compound. A peak wavelength of the emission spectrum of the exciplex is longer than or equal to a peak wavelength of the absorption band located on the longest wavelength side of the absorption spectrum of the phosphorescent compound. | 09-27-2012 |
20120248421 | LIGHT-EMITTING ELEMENT - A light-emitting element having extremely high efficiency of approximately 25% is provided. The light-emitting element includes a light-emitting layer which contains a phosphorescent guest, an n-type host, and a p-type host, where the light-emitting layer is interposed between an n-type layer including the n-type host and a p-type layer including the p-type host, and where the n-type host and the p-type host are able to form an exciplex in the light-emitting layer. The light-emitting element exhibits an extremely high emission efficiency (power efficiency of 74.3 lm/W, external quantum efficiency of 24.5%, energy efficiency of 19.3%) at a low driving voltage (2.6 V) at which luminance of 1200 cd/m | 10-04-2012 |
20120256535 | LIGHT-EMITTING ELEMENT - To provide a light-emitting element with high emission efficiency or long lifetime, in which the use amount of a phosphorescent compound is small. To provide a light-emitting element including a light-emitting layer between a pair of electrodes, wherein the light-emitting layer includes a phosphorescent compound, a first organic compound, and a second organic compound, and the combination of the first organic compound and the second organic compound forms an exciplex. The light-emitting element transfers energy by utilizing the overlap between the emission spectrum of the exciplex and the absorption spectrum of the phosphorescent compound and thus has high energy transfer efficiency, even when the concentration of the phosphorescent compound is low. | 10-11-2012 |
20120274201 | Light-Emitting Device, Electronic Device, and Lighting Device Utilizing Phosphorescence - A new light-emitting device utilizing phosphorescence is provided. Further, an electronic device and a lighting device which utilize phosphorescence are provided. One embodiment of the present invention is a light-emitting device including a phosphorescent organometallic iridium complex comprising iridium and either pyrimidine having an aryl group at the 4-position or 1,3,5-triazine having an aryl group at the 2-position. One of nitrogen in the pyrimidine or 1,3,5-triazine is coordinated to the iridium. Also, each of the pyrimidine and 1,3,5-triazine has a substituent such as an alkyl group or an aryl group. Further the ortho position of the aryl group which is bonded to the 4-position of the pyrimidine or the 2-position of the 1,3,5-triazine is bonded to the iridium. | 11-01-2012 |
20120288620 | Composition, Method for Manufacturing Thin Film, and Method for Manufacturing Light-Emitting Element - It is an object to provide a composition in which an anthracene derivative is dissolved and a technique in which a thin film that has a favorable film quality is formed by a wet process using the composition. In addition, it is another object to manufacture a highly reliable light-emitting element using the composition at low cost with high productivity. A composition having a solvent and an anthracene derivative having one anthracene structure and one carbazolyl group which is bonded to the anthracene structure directly or through a phenyl group is formed. A thin film with a favorable film quality can be formed by a wet process using the composition. Accordingly, a highly reliable light-emitting element can be manufactured using such a thin film. | 11-15-2012 |
20120302762 | Carbazole Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A carbazole compound represented by General Formula (G1) is provided. | 11-29-2012 |
20130009543 | HETEROCYCLIC COMPOUND, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - Provided is a novel heterocyclic compound which can be used as a host material for dispersing a light-emitting material in a light-emitting layer of a light-emitting element. Further provided is a light-emitting element which is driven at a low voltage and has high current efficiency. By including the light-emitting element, a light-emitting device, an electronic device, and a lighting device each with reduced power consumption are provided. The light-emitting element contains a compound in which a dibenzo[f,h]quinoline ring and a hole-transport skeleton are bonded through an arylene group. The light-emitting device, the electronic device, and the lighting device each including the light-emitting element are provided. The light-emitting element contains a heterocyclic compound having a structure represented by the following general formula (G1). | 01-10-2013 |
20130048964 | Light-Emitting Element, Light-Emitting Device, Electronic Device, Lighting Device, and Novel Organic Compound - A light-emitting element includes an EL layer between a pair of electrodes. The EL layer contains a first compound and a second compound. The first compound is a phosphorescent iridium metal complex having a LUMO level of greater than or equal to −3.5 eV and less than or equal to −2.5 eV, and the second compound is an organic compound having a pyrimidine skeleton. The light-emitting element includes an EL layer between a pair of electrodes. The EL layer contains a first compound and a second compound. The first compound is a phosphorescent iridium metal complex having a diazine skeleton, and the second compound is an organic compound having a pyrimidine skeleton. | 02-28-2013 |
20130048971 | HETEROCYCLIC COMPOUND, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - Provided is a novel heterocyclic compound which can be used in a light-emitting layer of a light-emitting element as a host material in which a light-emitting substance is dispersed. A heterocyclic compound represented by a general formula (G1) is provided. Any one of R | 02-28-2013 |
20130049577 | Quinoxaline Derivative, and Light-Emitting Element, Light-Emitting Device, and Electronic Device Using Quinoxaline Derivative - An object is to provide a novel quinoxaline derivative. Another object is to provide a light-emitting element with low driving voltage. Still another object is to provide a light-emitting element with low power consumption. Yet another object is to provide a light-emitting device and an electronic device each having low power consumption by using such a light-emitting element. A quinoxaline derivative is provided which has a structure in which at least one of carbon at a 2-position and carbon at a 3-position of quinoxaline, and carbon of a pyridine ring are bound via an arylene group. | 02-28-2013 |
20130060033 | LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, LIGHTING DEVICE, AND HETEROCYCLIC COMPOUND - Provided is a novel heterocyclic compound which has excellent heat resistance and can be used as a host material for a light-emitting substance (a substance emitting fluorescence or a substance emitting phosphorescence). A light-emitting element includes a heterocyclic compound which includes one dibenzo[f,h]quinoxaline ring, one ring having a hole-transport skeleton, and two to eight benzene rings. Note that in the above structure, the molecular weight of the heterocyclic compound is greater than or equal to 564 and less than or equal to 1000. | 03-07-2013 |
20130075704 | HETEROCYCLIC COMPOUND, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, LIGHTING DEVICE, AND ORGANIC COMPOUND - Provided is a novel heterocyclic compound which can be used in a light-emitting layer of a light-emitting element as a host material in which a light-emitting material is dispersed, i.e., a heterocyclic compound represented by a general formula (G1). Any one of R | 03-28-2013 |
20130075713 | Light-Emitting Element, Light-Emitting Device, and Electronic Device - A light-emitting element disclosed in the present invention includes a light-emitting layer and a first layer between a first electrode and a second electrode, in which the first layer is provided between the light-emitting layer and the first electrode. The present invention is characterized by the device structure in which the first layer comprising a hole-transporting material is doped with a hole-blocking material or an organic compound having a large dipole moment. This structure allows the formation of a high performance light-emitting element with high luminous efficiency and long lifetime. The device structure of the present invention facilitates the control of the rate of the carrier transport, and thus, leads to the formation of a light-emitting element with a well-controlled carrier balance, which contributes to the excellent characteristics of the light-emitting element of the present invention. | 03-28-2013 |
20130082591 | HETEROCYCLIC COMPOUND, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - To provide a novel heterocyclic compound that can be used as a host material in which a light-emitting substance of a light-emitting layer is dispersed. A heterocyclic compound comprising a dibenzo[f,h]quinoxaline ring and two hole-transport skeletons, where the dibenzo[f,h]quinoxaline ring and the two hole-transport skeletons are bonded to an aromatic hydrocarbon group. A heterocyclic compound represented by the following general formula (G1) is provided. | 04-04-2013 |
20130134395 | LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, LIGHTING DEVICE AND ORGANIC COMPOUND - A novel organic compound which can be used as a host material for a phosphorescent compound is provided. A light-emitting element containing the organic compound is provided. A light-emitting device, an electronic device, and a lighting device each of which includes the light-emitting element are provided. In the light-emitting element including a light-emitting layer interposed between a pair of electrodes, the light-emitting layer contains at least an organic compound and a phosphorescent compound. In the organic compound, a dibenzo[f,h]quinoxaline skeleton and an amino group having two substituents are bonded to each other through an arylene group. The substituents are separately an aryl group or a heteroaryl group. | 05-30-2013 |
20130221335 | Fluorene Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - One embodiment of the present invention is a fluorene compound. Specifically, one embodiment of the present invention is a fluorene compound in which two 9-phenylfluoren-9-yl groups are each bonded to any of a pyridine skeleton and a pyrimidine skeleton through an arylene group, and in which the arylene group is any of one to three phenylene groups. | 08-29-2013 |
20130240851 | LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - A light-emitting element having high external quantum efficiency is provided. A light-emitting element having a long lifetime is provided. A light-emitting element includes a light-emitting layer between a pair of electrodes. The light-emitting layer contains at least a phosphorescent compound, a first organic compound (host material) having an electron-transport property, and a second organic compound (assist material) having a hole-transport property. The light-emitting layer has a stacked-layer structure including a first light-emitting layer and a second light-emitting layer, and the first light-emitting layer contains a higher proportion of the second organic compound than the second light-emitting layer. In the light-emitting layer (the first light-emitting layer and the second light-emitting layer), a combination of the first organic compound and the second organic compound forms an exciplex. | 09-19-2013 |
20130277655 | Light-Emitting Element, Light-Emitting Device, Electronic Appliance, and Lighting Device - A light-emitting element which has low driving voltage and high emission efficiency is provided. The light-emitting element includes, between a pair of electrodes, a hole-transport layer and a light-emitting layer over the hole-transport layer. The light-emitting layer contains a first organic compound having an electron-transport property, a second organic compound having a hole-transport property, and a light-emitting third organic compound converting triplet excitation energy into light emission. A combination of the first organic compound and the second organic compound forms an exciplex. The hole-transport layer contains at least a fourth organic compound whose HOMO level is lower than or equal to that of the second organic compound and a fifth organic compound whose HOMO level is higher than that of the second organic compound. | 10-24-2013 |
20130277656 | Light-Emitting Element, Light-Emitting Device, Electronic Appliance, and Lighting Device - A light-emitting element which has low driving voltage and high emission efficiency is provided. The light-emitting element includes, between a pair of electrodes, a hole-transport layer and a light-emitting layer over the hole-transport layer. The light-emitting layer contains a first organic compound having an electron-transport property, a second organic compound having a hole-transport property, and a light-emitting third organic compound converting triplet excitation energy into light emission. A combination of the first organic compound and the second organic compound forms an exciplex. The hole-transport layer is formed using two or more kinds of organic compounds and contains at least the second organic compound. | 10-24-2013 |
20130299798 | Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - Objects of the present invention are to provide: a light-emitting element having a long lifetime and good emission efficiency and drive voltage. One embodiment of the invention is a light-emitting element including, between an anode and a cathode, at least a stack structure in which a first layer, a second layer, and a light-emitting layer are provided in order from the anode side. The first layer includes a first organic compound and an electron-accepting compound. The second layer includes a second organic compound having a HOMO level differing from the HOMO level of the first organic compound by from −0.2 eV to +0.2 eV. The light-emitting layer includes a third organic compound having a HOMO level differing from the HOMO level of the second organic compound by from −0.2 eV to +0.2 eV and a light-emitting substance having a hole-trapping property with respect to the third organic compound. | 11-14-2013 |
20130344635 | Composition, Method for Manufacturing Thin Film, and Method for Manufacturing Light-Emitting Element - It is an object to provide a composition in which an anthracene derivative is dissolved and a technique in which a thin film that has a favorable film quality is formed by a wet process using the composition. In addition, it is another object to manufacture a highly reliable light-emitting element using the composition at low cost with high productivity. A composition having a solvent and an anthracene derivative having one anthracene structure and one carbazolyl group which is bonded to the anthracene structure directly or through a phenyl group is formed. A thin film with a favorable film quality can be formed by a wet process using the composition. Accordingly, a highly reliable light-emitting element can be manufactured using such a thin film. | 12-26-2013 |
20140014930 | Organic Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A novel organic compound with which the emission characteristics, emission efficiency, and reliability of a light-emitting element can be improved is provided. The organic compound has an imidazo[1,2-f]phenanthridine skeleton and a dibenzothiophene skeleton or a dibenzofuran skeleton bonded through an arylene group. The light-emitting element including the organic compound in a light-emitting layer shows high efficiency and low power consumption. | 01-16-2014 |
20140034924 | Heterocyclic Compound and Light-Emitting Device, Display Device, Lighting Device, and Electronic Device Using the Same - Provided is a compound having an indolo[3,2,1-jk]carbazole skeleton and a heterocyclic skeleton which are bonded to each other through an arylene group. The heterocyclic skeleton contains an imidazole skeleton, a pyrazine skeleton, a pyrimidine skeleton, a triazole skeleton, or a condensed heteroaromatic ring including any of these heterocycles. The high carrier-transport property and the large band gap of the compound allows the used as a host material of a phosphorescent dopant, leading to the formation of a green to blue emissive phosphorescent light-emitting element having high emission efficiency, low driving voltage, and reduced power consumption. | 02-06-2014 |
20140034925 | Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A light-emitting element with low drive voltage, a light-emitting element with high current efficiency, and/or a light-emitting element with a long lifetime are/is provided. Specifically, a light-emitting element with low drive voltage, a light-emitting element with high current efficiency, and/or a light-emitting element with a long lifetime are/is provided by the use of an organic compound with a dibenzo[f,h]quinoxaline skeleton in a light-emitting layer. In a light-emitting element which includes a light-emitting layer containing an organic compound between a pair of electrodes, the organic compound has a 2,3-unsubstituted dibenzo[f,h]quinoxaline skeleton, a hole-transport skeleton selected from a substituted or unsubstituted dibenzothiophene skeleton, a substituted or unsubstituted dibenzofuran skeleton, and a substituted or unsubstituted carbazole skeleton, and an arylene skeleton, and the 2,3-unsubstituted dibenzo[f,h]quinoxaline skeleton and the hole-transport skeleton are bonded through the arylene skeleton. | 02-06-2014 |
20140034928 | Organic Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A novel organic compound having a high hole-transport property is provided. A long-lifetime light-emitting element is provided. An organic compound represented by General Formula (G0) is provided. In General Formula (G0), Ar | 02-06-2014 |
20140061604 | LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - A light-emitting element having high external quantum efficiency is provided. A light-emitting element having a long lifetime is provided. A light-emitting layer is provided between a pair of electrodes. The light-emitting layer is a stack of a first light-emitting layer, which contains a first phosphorescent compound, a first organic compound having an electron-transport property, and a second organic compound having a hole-transport property and is provided on the anode side, and a second light-emitting layer, which contains at least a second phosphorescent compound and the first organic compound having an electron-transport property. A combination of the first organic compound and the second organic compound forms an exciplex. | 03-06-2014 |
20140066633 | ORGANIC COMPOUND, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - A novel substance with which an increase in life and emission efficiency of a light-emitting element can be achieved is provided. A carbazole compound having a structure represented by General Formula (G1) is provided. Note that a substituent which makes the HOMO level and the LUMO level of a compound in which a bond of the substituent is substituted with hydrogen deep and shallow, respectively is used as each of substituents in General Formula (G1) (R | 03-06-2014 |
20140081031 | Anthracene Derivative, Light-Emitting Element, Light-Emitting Device, and Electronic Appliance - Novel anthracene derivatives are provided. Further, a light-emitting element, a light-emitting device, and an electronic appliance each using the novel anthracene derivative are provided. Anthracene derivatives represented by general formulae (G11) and (G21) are provided. The anthracene derivatives represented by the general formulae (G11) and (G21) each emit blue light with high color purity and have a carrier-transporting property. Therefore, each of the anthracene derivatives represented by the general formulae (G11) and (G21) is suitable for use in a light-emitting element, a light-emitting device, and an electronic appliance. | 03-20-2014 |
20140084273 | Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - A light-emitting element emitting phosphorescence and having high emission efficiency, in which a property of injecting holes to a light-emitting layer is increased, is provided. The light-emitting layer of the light-emitting element includes a first organic compound represented by the following general formula (G1) and a second organic compound which is a phosphorescent compound. The difference between the HOMO level of the first organic compound and the HOMO level of the second organic compound is lower than or equal to 0.3 eV. | 03-27-2014 |
20140084274 | Light-Emitting Element - A light-emitting element with high emission efficiency is provided. The light-emitting element includes, between a pair of electrodes, a layer containing a p-type host, a light-emitting layer containing a guest, the p-type host, and an n-type host, and a layer containing the n-type host. A combination of the p-type host and the n-type host forms an exciplex. Among the layer containing the p-type host, the light-emitting layer, and the layer containing the n-type host, the light-emitting layer has the highest secondary ion intensity of the n-type host, the layer containing the n-type host has the second-highest secondary ion intensity of the n-type host, and the layer containing the p-type host has the lowest secondary ion intensity of the n-type host in analysis by a time-of-flight secondary ion mass spectrometer. | 03-27-2014 |
20140124764 | HETEROCYCLIC COMPOUND, LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE - To provide a novel heterocyclic compound capable of being used as a host material in which a light-emitting substance is dispersed. To provide a light-emitting element having a long lifetime. A heterocyclic compound in which a dibenzo[f,h]quinoxalinyl group and a benzo[b]naphtho[1,2-d]furanyl group are bonded through an arylene group having 6 to 13 carbon atoms. The dibenzo[f,h]quinoxalinyl group, the benzo[b]naphtho[1,2-d]furanyl group, and the arylene group separately are unsubstituted or have, as a substituent, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 13 carbon atoms. | 05-08-2014 |
20140145166 | Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device - To provide a light-emitting element with high emission efficiency. In a light-emitting element including an organic compound between a pair of electrodes, the molecular weight X of the organic compound is 450 or more and 1500 or less, and the absorption edge of the organic compound is at 380 nm or more. By liquid chromatography mass spectrometry in a positive mode in which an argon gas is made to collide with the organic compound subjected to separation using a liquid chromatograph at any energy higher than or equal to 1 eV and lower than or equal to 30 eV, a product ion is detected at least around m/z=(X−240). | 05-29-2014 |
20140179920 | Organometallic Complex, and Light-Emitting Element and Display Device Using the Organometallic Complex - An object is to provide an organometallic complex whose phosphorescence characteristics can be adjusted by varying the structure of a ligand. Alternatively, an object is to provide an organometallic complex capable of emitting yellow phosphorescence with high luminance. Alternatively, an object is to provide a light-emitting device with high added value. An organometallic complex which has a structure represented by a general formula (G1) below and at least one substituent group represented by a general formula (G2) below as a phenyl group and is formed in such a way that a phenylpyrazine derivative represented by a general formula (G0) below is ortho-metalated by an ion of a Group 9 metal or of a Group 10 metal is provided. Alternatively, a light-emitting element and a light-emitting device formed including the organometallic complex are provided. | 06-26-2014 |
20140183503 | Light-Emitting Element, Light-Emitting Device, Electronic Appliance, and Lighting Device - Disclosed is a light-emitting element having high emission efficiency, capable of driving at low voltage, and showing a long lifetime. The light-emitting element contains a compound between a pair of electrodes, and the compound is configured to give a first peak of m/z around 202 and a second peak of m/z around 227 in a mass spectrum. The first and second peaks are product ions of the compound and possess compositions of C | 07-03-2014 |
20140252338 | LIGHT-EMITTING ELEMENT - To provide a light-emitting element with high emission efficiency or long lifetime, in which the use amount of a phosphorescent compound is small. To provide a light-emitting element including a light-emitting layer between a pair of electrodes, wherein the light-emitting layer includes a phosphorescent compound, a first organic compound, and a second organic compound, and the combination of the first organic compound and the second organic compound forms an exciplex. The light-emitting element transfers energy by utilizing the overlap between the emission spectrum of the exciplex and the absorption spectrum of the phosphorescent compound and thus has high energy transfer efficiency, even when the concentration of the phosphorescent compound is low. | 09-11-2014 |
20140339524 | LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, DISPLAY DEVICE, LIGHTING DEVICE, AND ELECTRONIC DEVICE - Provided is a light-emitting element which has an anode, a light-emitting layer over the anode, an electron-transport layer over and in contact with the light-emitting layer, an electron-injection layer over and in contact with the electron-transport layer, and a cathode over and in contact with the electron-injection layer. The light-emitting layer has an electron-transport property, and the electron-transport layer includes an anthracene derivative. The light-emitting layer further includes a phosphorescent substance. This device structure allows the formation of a highly efficient blue-emissive light-emitting element even though the phosphorescent substance has higher triplet energy than the anthracene derivative which directly contacts with the light-emitting layer. | 11-20-2014 |
20150021579 | LIGHT-EMITTING ELEMENT - A light-emitting element having extremely high efficiency of approximately 25% is provided. The light-emitting element includes a light-emitting layer which contains a phosphorescent guest, an n-type host, and a p-type host, where the light-emitting layer is interposed between an n-type layer including the n-type host and a p-type layer including the p-type host, and where the n-type host and the p-type host are able to form an exciplex in the light-emitting layer. The light-emitting element exhibits an extremely high emission efficiency (power efficiency of 74.3 lm/W, external quantum efficiency of 24.5%, energy efficiency of 19.3%) at a low driving voltage (2.6 V) at which luminance of 1200 cd/m | 01-22-2015 |