Patent application number | Description | Published |
20080238308 | Method and Apparatus for Light Emission Utilizing an OLED with a Microcavity - Provided is an OLED device and method of making the OLED device. According to an embodiment, the OLED device incorporates a microcavity structure including a dielectric mirror formed on a glass substrate, an anode formed above the dielectric mirror, an organic film layer formed above the anode, and a reflective electrode formed above the organic film layer such that the cavity is formed in the organic film layer by the dielectric mirror and the reflective electrode. The OLED device with microcavity structure can incorporate one or more phosphors deposited on an underside of the glass substrate such that light of additional wavelengths can be generated by the OLED device. | 10-02-2008 |
20090127977 | Method and Apparatus for Imaging Utilizing an Ultrasonic Imaging Sensor Array - The subject invention pertains to a piezoelectric device structure for improved acoustic wave sensing and/or generation, and process for making same. The piezoelectric thin film field effect transducer can be a thin film transistor (TFT) with either a piezoelectric film gate or a composite gate having a dielectric film and a piezoelectric film. The TFT structure can be either a top gate device or a bottom gate device. In an embodiment, the piezoelectric device structure can be used to form an array of piezoelectric thin film field effect transducers. A TFT switch can drive each piezoelectric transducer in the array. The piezoelectric transducers can both generate and sense acoustic waves. In a sensing mode, a signal from an acoustic wave can be collected at a readout terminal of the piezoelectric transducer. In a generating mode, an excitation signal can be applied across the piezoelectric transducer while the switch is ‘on’. | 05-21-2009 |
20100003511 | TRANSPARENT CONDUCTING ELECTRODE - A transparent electrode multilayer film has at least one group III doped ZnO layer and at least one metal layer, where layers of doped ZnO alternate with metal layers. When a plurality of group III doped ZnO layers are present, the doped ZnO layers can have the same or different dopants and one or more dopants can be present in a doped ZnO layer. When a plurality of metal layers is present, the layers can be of the same or different metals, and a metal layer can be a single metal or a combination of two or more metals. The multilayer film can be free standing, but generally includes a substrate. Advantageous substrates are transparent and can be flexible for use as a flexible electrode. A method to form a transparent conductive multilayer film involves depositing at least one layer of a group III doped ZnO and at least one metal layer on a substrate. | 01-07-2010 |
20100181552 | METHOD AND APPARATUS FOR INFRARED DETECTION AND DISPLAY - Embodiments of the subject invention relate to a method and apparatus for infrared (IR) detection. Organic layers can be utilized to produce a phototransistor for the detection of IR radiation. The wavelength range of the IR detector can be modified by incorporating materials sensitive to photons of different wavelengths. Quantum dots of materials sensitive to photons of different wavelengths than the host organic material of the absorbing layer of the phototransistor can be incorporated into the absorbing layer so as to enhance the absorption of photons having wavelengths associated with the material of the quantum dots. A photoconductor structure can be used instead of a phototransistor. The photoconductor can incorporate PbSe or PbS quantum dots. The photoconductor can incorporate organic materials and part of an OLED structure. A detected IR image can be displayed to a user. Organic materials can be used to create an organic light-emitting device. | 07-22-2010 |
20100237336 | NANOTUBE ENABLED, GATE-VOLTAGE CONTROLLED LIGHT EMITTING DIODES - Embodiments of the invention relate to vertical field effect transistor that is a light emitting transistor. The light emitting transistor incorporates a gate electrode for providing a gate field, a first electrode comprising a dilute nanotube network for injecting a charge, a second electrode for injecting a complementary charge, and an electroluminescent semiconductor layer disposed intermediate the nanotube network and the electron injecting layer. The charge injection is modulated by the gate field. The holes and electrons, combine to form photons, thereby causing the electroluminescent semiconductor layer to emit visible light. In other embodiments of the invention a vertical field effect transistor that employs an electrode comprising a conductive material with a low density of states such that the transistors contact barrier modulation comprises barrier height lowering of the Schottky contact between the electrode with a low density of states and the adjacent semiconductor by a Fermi level shift. | 09-23-2010 |
20110023934 | SOLARTURF: SOLAR ENERGY HARVESTING ARTIFICIAL TURF - A SolarTurf unit has a plurality of solar blades, each blade comprising a donor-acceptor conjugated polymer (DA-CP) disposed between and electrically contacting a working electrode and a counter electrode where at least one of electrodes is transparent and where the plurality of solar blades have like or different DA-CPs having like color or different colors, for example, green. The SolarTurf unit includes an interconnect strip having a first electrically conductive surface and a second electrically conductive surface separated by an insulator. The working electrodes are electrically connected to the first electrically conductive surface and the counter electrodes are electrically connected to the second electrically conductive surface. The SolarTurf units can be combined into a device for harvesting light energy to provide an electric output. The SolarTurf device can have the appearance of a lawn or other plant, fungi, rock, sand or animal. | 02-03-2011 |
20110031399 | METHOD AND APPARATUS FOR INFRARED DETECTION AND DISPLAY - Embodiments of the subject invention relate to a method and apparatus for infrared (IR) detection. Organic layers can be utilized to produce a phototransistor for the detection of IR radiation. The wavelength range of the IR detector can be modified by incorporating materials sensitive to photons of different wavelengths. Quantum dots of materials sensitive to photons of different wavelengths than the host organic material of the absorbing layer of the phototransistor can be incorporated into the absorbing layer so as to enhance the absorption of photons having wavelengths associated with the material of the quantum dots. A photoconductor structure can be used instead of a phototransistor. The photoconductor can incorporate PbSe or PbS quantum dots. The photoconductor can incorporate organic materials and part of an OLED structure. A detected IR image can be displayed to a user. Organic materials can be used to create an organic light-emitting device. | 02-10-2011 |
20110031403 | METHOD AND APPARATUS FOR INFRARED DETECTION AND DISPLAY - Embodiments of the subject invention relate to a method and apparatus for infrared (IR) detection. Organic layers can be utilized to produce a phototransistor for the detection of IR radiation. The wavelength range of the IR detector can be modified by incorporating materials sensitive to photons of different wavelengths. Quantum dots of materials sensitive to photons of different wavelengths than the host organic material of the absorbing layer of the phototransistor can be incorporated into the absorbing layer so as to enhance the absorption of photons having wavelengths associated with the material of the quantum dots. A photoconductor structure can be used instead of a phototransistor. The photoconductor can incorporate PbSe or PbS quantum dots. The photoconductor can incorporate organic materials and part of an OLED structure. A detected IR image can be displayed to a user. Organic materials can be used to create an organic light-emitting device. | 02-10-2011 |
20120067395 | EARTH-TONED PHOTOVOLTAIC DEVICES - The invention is directed to an assembly of photovoltaic cells having at least two different earth-toned colors, where different colors are situated in different cells, the cells color being defined by the donor-acceptor (DA) π-conjugated polymer and an acceptor moiety combination comprising the photoactive layer of the cell, and where the different colored solar cells are coupled into an assembly. The assembly can be flexible and can have colors specifically arranged in a camouflage or other pattern. | 03-22-2012 |
20120120643 | SOLAR-POWERED LIGHTING MODULE - A solar-powered lighting module is provided, including a solar cell for generating electricity when exposed to light, a battery for storing charge from the generated electricity, and a light generating device powered by the stored charge. In an embodiment, the module further includes a controller that regulates the current transmitted between the components of the module. In a further embodiment, the module is incorporated into an interface to an environmentally controlled space and can be positioned to light an interior portion of the space. In another embodiment, the solar cell and light generating device are transparent to allow light to pass through the interface. In a further embodiment, tinted-color conjugated polymers incorporated into the module limit the spectrum of light that can pass through the interface. In yet another embodiment, a method of modifying an existing interface with such a module is provided. | 05-17-2012 |
20120126204 | IR PHOTODETECTORS WITH HIGH DETECTIVITY AT LOW DRIVE VOLTAGE - An IR photodetector with high detectivity comprises an IR sensitizing layer situated between an electron blocking layer (EBL) and a hole blocking layer (HBL). The EBL and HBL significantly reduce the dark current, resulting in a high detectivity while allowing use of a low applied voltage to the IR photodetector. | 05-24-2012 |
20120187295 | METHOD AND APPARATUS FOR PROVIDING A CHARGE BLOCKING LAYER ON AN INFRARED UP-CONVERSION DEVICE - Embodiments of the invention are directed to an improved device for sensing infrared (IR) radiation with upconversion to provide an output of electromagnetic radiation having a shorter wavelength than the incident IR radiation, such as visible light. The device comprises an anode, a hole blocking layer to separate an IR sensing layer from the anode, an organic light emitting layer that is separated from the anode by the IR sensing layer, and a cathode. The hole blocking layer assures that when a potential is applied between the anode and the cathode the organic light emitting layer generates electromagnetic radiation only when the IR sensing layer is irradiated with IR radiation. | 07-26-2012 |
20120216870 | INTERLAYER FOR ORGANIC SOLAR CELLS - An organic PV solar cell that has an anode double interlayer situated between an electrode and an organic photoactive layer displays superior power conversion efficiency over that of equivalent devices with an anode single interlayer. The anode double layer can comprise a hole extraction layer adjacent to the anode and an organic hole accepting electron blocking material layer that comprises an aromatic amine compound with a plurality of N atoms. The hole extraction layer can be a metal oxide or an n-type organic semiconductor. | 08-30-2012 |
20120217477 | UP-CONVERSION DEVICE WITH BROAD BAND ABSORBER - Embodiments of the invention are directed to an IR photodetector that broadly absorbs electromagnetic radiation including at least a portion of the near infrared (NIR) spectrum. The IR photodetector comprises polydispersed QDs of PbS and/or PbSe. The IR photodetector can be included as a layer in an up-conversion device when coupled to a light emitting diode (LED) according to an embodiment of the invention. | 08-30-2012 |
20120256175 | NANOTUBE ENABLED, GATE-VOLTAGE CONTROLLED LIGHT EMITTING DIODES - Embodiments of the invention relate to vertical field effect transistor that is a light emitting transistor. The light emitting transistor incorporates a gate electrode for providing a gate field, a first electrode comprising a dilute nanotube network for injecting a charge, a second electrode for injecting a complementary charge, and an electroluminescent semiconductor layer disposed intermediate the nanotube network and the electron injecting layer. The charge injection is modulated by the gate field. The holes and electrons, combine to form photons, thereby causing the electroluminescent semiconductor layer to emit visible light. In other embodiments of the invention a vertical field effect transistor that employs an electrode comprising a conductive material with a low density of states such that the transistors contact barrier modulation comprises barrier height lowering of the Schottky contact between the electrode with a low density of states and the adjacent semiconductor by a Fermi level shift. | 10-11-2012 |
20120286296 | METHOD AND APPARATUS FOR SENSING INFRARED RADIATION - Embodiments of the invention pertain to a method and apparatus for sensing infrared (IR) radiation. In a specific embodiment, a night vision device can be fabricated by depositing a few layers of organic thin films. Embodiments of the subject device can operate at voltages in the range of 10-15 Volts and have lower manufacturing costs compared to conventional night vision devices. Embodiments of the device can incorporate an organic phototransistor in series with an organic light emitting device. In a specific embodiment, all electrodes are transparent to infrared light. An IR sensing layer can be incorporated with an OLED to provide IR-to-visible color up-conversion. Improved dark current characteristics can be achieved by incorporating a poor hole transport layer material as part of the IR sensing layer. | 11-15-2012 |
20120305902 | MICROCAVITY OLEDS FOR LIGHTING - Various methods and systems are provided for related to organic light emitting diodes (OLEDs) having a microcavity In one embodiment, a white-light source includes a first microcavity organic light emitting diode (OLED) configured to emit a narrow spectrum of blue light, a second microcavity OLED configured to emit a narrow spectrum of green light, and a third microcavity OLED configured to emit a narrow spectrum of red light In another embodiment, a light source includes a plurality of OLEDs disposed on a glass substrate Each of the OLEDs is configured to emit light in substantially orthogonal to the glass substrate in a predefined spectrum Each of the OLEDs includes a semi-reflecting mirror, and an emitting layer, where the emitting layer in each OLED corresponds to a respective color of light emitted by the OLED. | 12-06-2012 |
20130008509 | INVERTED POLYMER SOLAR CELL USING A DOUBLE INTERLAYER - A polymer based solar cell having an inverted geometry includes a transparent cathode and a double interlayer that has a hole extracting layer and a hole transport/electron blocking layer situated between an active layer, for example, a bulk heterojunction (BHJ) layer, and an anode. The inverted solar cells according to embodiments of the invention display significant efficiency improvements over polymer based solar cells that do not have the inverted geometry and lack the double interlayer. | 01-10-2013 |
20130019937 | PHOTOVOLTAIC CELL ENHANCEMENT THROUGH UVO TREATMENT - Photovoltaic cells, methods of fabricating photovoltaic cells, and methods of using photovoltaic cells to capture light energy are provided. A photovoltaic cell can include an electron transporting layer, a photoactive layer, and a hole transporting layer. The electron transporting layer can be ultraviolet ozone treated. The photovoltaic cell can have an inverted configuration. | 01-24-2013 |
20130206988 | METHOD AND APPARATUS FOR INFRARED DETECTION AND DISPLAY - Embodiments of the subject invention relate to a method and apparatus for infrared (IR) detection. Organic layers can be utilized to produce a phototransistor for the detection of IR radiation. The wavelength range of the IR detector can be modified by incorporating materials sensitive to photons of different wavelengths. Quantum dots of materials sensitive to photons of different wavelengths than the host organic material of the absorbing layer of the phototransistor can be incorporated into the absorbing layer so as to enhance the absorption of photons having wavelengths associated with the material of the quantum dots. A photoconductor structure can be used instead of a phototransistor. The photoconductor can incorporate PbSe or PbS quantum dots. The photoconductor can incorporate organic materials and part of an OLED structure. A detected IR image can be displayed to a user. Organic materials can be used to create an organic light-emitting device. | 08-15-2013 |
20130328029 | Microcavity OLEDS for Lighting - Various methods and systems are provided for related to organic light emitting diodes (OLEDs) having a microcavity. In one embodiment, a white-light source includes a first microcavity organic light emitting diode (OLED) configured to emit a narrow spectrum of blue light; a second microcavity OLED configured to emit a narrow spectrum of green light, and a third microcavity OLED configured to emit a narrow spectrum of red light. In another embodiment, a light source includes a plurality of OLEDs disposed on a glass substrate. Each of the OLEDs is configured to emit light in substantially orthogonal to the glass substrate in a predefined spectrum. Each of the OLEDs includes a semi-reflecting mirror; and an emitting layer, where the emitting layer in each OLED corresponds to a respective color of light emitted by the OLED. | 12-12-2013 |
20130334520 | GERMOLE CONTAINING CONJUGATED MOLECULES AND POLYMERS - Embodiments of the invention are directed to Ge comprising heterocyclic compounds which can be used for the preparation of homopolymers and copolymers. The copolymers can be donor-acceptor (DA) alternating copolymers where the donor unit is a Ge comprising heterocyclic unit. The polymers can be used as materials in solar cells and other photovoltaic devices, transistors, diodes, light emitting devices (LEDs), conductors, supercapacitors, batteries, and electrochromic devices. | 12-19-2013 |
20140060613 | METHOD AND APPARATUS FOR INTEGRATING AN INFRARED (IR) PHOTOVOLTAIC CELL ON A THIN FILM PHOTOVOLTAIC CELL - Embodiments of the subject invention relate to solar panels, methods of fabricating solar panels, and methods of using solar panels to capture and store solar energy. An embodiment of a solar panel can include a photovoltaic cell that is sensitive to visible light and an infrared photovoltaic cell that is sensitive to light having a wavelength of greater than 0.70 μm. | 03-06-2014 |
20140061617 | METHOD AND APPARATUS FOR INTEGRATING AN INFRARED (HR) PHOLOVOLTAIC CELL ON A THIN PHOTOVOLTAIC CELL - Embodiments of the subject invention relate to a method and apparatus for providing an at: least partially transparent one-side emitting OLED. The at least partially transparent one-side emitting OLED can include a mirror, such as a mirror substrate, substrate with a transparent anode and a transparent cathode. The mirror can allow at least a portion of the visible spectrum of light to pass through, while also reflecting at least another portion of the visible spectrum of light. The mirror can reflect at least a portion of the visible light emitted by a light emitting layer of the OLED incident on a first surface of the mirror, while allowing another portion of the visible light incident on a second surface of the mirror to pass through the mirror. | 03-06-2014 |
20140070191 | METHOD AND APPARATUS FOR PROVIDING A WINDOW WITH AN AT LEAST PARTIALLY TRANSPARENT ONE SIDE EMITTING OLED LIGHTING AND AN IR SENSITIVE PHOTOVOLTAIC PANEL - Embodiments of the subject invention relate to a method and apparatus for providing a apparatus that can function as a photovoltaic cell, for example during the day, and can provide solid state lighting, for example at night. The apparatus can therefore function as a lighting window. An embodiment can integrate an at least partially transparent one-side emitting OLED and a photovoltaic cell. The photovoltaic cell can be sensitive to infrared light, for example light having a wavelength greater than 1 μm. The apparatus can be arranged such that the one direction in which the OLED emits is toward the inside of a building or other structure and not out into the environment. | 03-13-2014 |
20140111652 | INFRARED IMAGING DEVICE INTEGRATING AN IR UP-CONVERSION DEVICE WITH A CMOS IMAGE SENSOR - Imaging devices include an IR up-conversion device on a CMOS imaging sensor (CIS) where the up-conversion device comprises a transparent multilayer stack. The multilayer stack includes an IR sensitizing layer and a light emitting layer situated between a transparent anode and a transparent cathode. In embodiments of the invention, the multilayer stack is formed on a transparent support that is coupled to the CIS by a mechanical fastener or an adhesive or by lamination. In another embodiment of the invention, the CIS functions as a supporting substrate for formation of the multilayer stack. | 04-24-2014 |
20140175410 | TRANSPARENT INFRARED-TO-VISIBLE UP-CONVERSION DEVICE - Embodiments of the invention are directed to a transparent up-conversion device having two transparent electrodes. In embodiments of the invention, the up-conversion device comprises a stack of layers proceeding from a transparent substrate including an anode, a hole blocking layer, an IR sensitizing layer, a hole transport layer, a light emitting layer, an electron transport layer, a cathode, and an antireflective layer. In an embodiment of the invention, the up-conversion device includes an IR pass visible blocking layer, | 06-26-2014 |
20140217284 | METHOD AND APPARATUS FOR DETECTING INFRARED RADIATION WITH GAIN - Photodetectors, methods of fabricating the same, and methods using the same to detect radiation are described. A photodetector can include a first electrode, a light sensitizing layer, an electron blocking/tunneling layer, and a second electrode. Infrared-to-visible upconversion devices, methods of fabricating the same, and methods using the same to detect radiation are also described. An Infrared-to-visible upconversion device can include a photodetector and an OLED coupled to the photodetector. | 08-07-2014 |
20140217365 | PHOTODETECTOR AND UPCONVERSION DEVICE WITH GAIN (EC) - Embodiments of the invention are directed to IR photodetectors with gain resulting from the positioning of a charge multiplication layer (CML) between the cathode and the IR sensitizing layer of the photodetector, where accumulating charge at the CML reduces the energy difference between the cathode and the CML to promote injection of electrons that result in gain for an electron only device. Other embodiments of the invention are directed to inclusion of the IR photodetectors with gain into an IR-to-visible up-conversion device that can be used in night vision and other applications. | 08-07-2014 |
20140353502 | PHOTODETECTOR AND UPCONVERSION DEVICE WITH GAIN (EC) - Embodiments of the invention are directed to IR photodetectors with gain resulting from the positioning of a charge multiplication layer (CML) between the cathode and the IR sensitizing layer of the photodetector, where accumulating charge at the CML reduces the energy difference between the cathode and the CML to promote injection of electrons that result in gain for an electron only device. Other embodiments of the invention are directed to inclusion of the IR photodetectors with gain into an IR-to-visible up-conversion device that can be used in night vision and other applications. | 12-04-2014 |
20140367572 | METHOD AND APPARATUS FOR PROVIDING A CHARGE BLOCKING LAYER ON AN INFRARED UP-CONVERSION DEVICE - Embodiments of the invention are directed to an improved device for sensing infrared (IR) radiation with up-conversion to provide an output of electromagnetic radiation having a shorter wavelength than the incident IR radiation, such as visible light. The device comprises an anode, a hole blocking layer to separate an IR sensing layer from the anode, an organic light emitting layer that is separated from the anode by the IR sensing layer, and a cathode. The hole blocking layer assures that when a potential is applied between the anode and the cathode the organic light emitting layer generates electromagnetic radiation only when the IR sensing layer is irradiated with IR radiation. | 12-18-2014 |