Patent application number | Description | Published |
20080248240 | Cavity electroluminescent devices and methods for producing the same - Aspects of the invention include electroluminescent devices and methods for making the same. In certain embodiments, the devices include a substrate, a hole-injection electrode layer, a dielectric layer, an electroluminescent layer, an electron-injection electrode layer, and a cavity. In certain embodiments, the hole-injection electrode layer is positioned above the substrate, the dielectric layer is positioned above the hole-injection layer, and the electron-injection electrode layer is positioned above the dielectric layer. In certain embodiments, this order is reversed. In certain embodiments, the cavity extends through at least the dielectric layer and/or may extend through one or more of the electrode layers (e.g., the hole-injection and/or electron-injection electrode layer). In certain embodiments, the electroluminescent layer is positioned in the cavity and is in contact with the hole-injection electrode layer, the dielectric layer, and the electron-injection electrode layer. In certain embodiments, the electroluminescent layer is interposed between the hole-injection electrode layer and the electron-injection electrode layer. In certain embodiments, the electroluminescent layer includes a polymeric material, and in certain embodiments, the electroluminescent layer includes one or more small molecules. In certain embodiments, an electrode layer (e.g., the electron-injection or hole-injection electrode layer) is positioned above the cavity and is configured for directing light through the substrate. In certain embodiments, an electrode layer (e.g., the electron-injection or hole-injection electrode layer) is positioned above and spans across the cavity. The use of the produced device(s) in electroluminescent displays is also provided herein. | 10-09-2008 |
20110042657 | High Efficiency Electroluminescent Devices and Methods for Producing the Same - Aspects of the disclosure include electroluminescent devices and methods for making the same. The devices include a substrate, a hole-injection electrode layer, an electroluminescent layer, and an electron-injection electrode layer, such as a layer that includes an air-stable, low work function material, which layer is capable of achieving efficient electron injection with reduced current leakage. In certain embodiments, the devices may contain an efficient electron injection layer that includes a composition comprising a polymer, e.g., a polymer that contains polar components (such as a polar functional group), and a metal diketonate. In certain embodiments, the devices may contain an electron injection layer that includes polyethylene glycol dimethyl ether and barium or calcium acetylacetonate. Methods of manufacturing such devices, for instance, employing a solution processing step for the deposition of an electron injection layer, as well as the use of the produced device(s) in electroluminescent displays is also provided herein. | 02-24-2011 |
20110163299 | Electroluminescent Devices Employing Organic Cathodes - The disclosure provides methods, materials, and devices suitable for use in electroluminescent devices. In one embodiment, for example, there is provided a layered cathode comprising a metal substrate and an intermediate organic or organometallic layer having an electron accepting group. The intermediate layer provides an interface with an overlaying electroluminescent layer. The disclosure finds utility, for example, in the field of microelectronic devices. | 07-07-2011 |
20120038067 | ENCAPSULATION METHODS FOR ORGANIC ELECTRICAL DEVICES - The disclosure provides methods and materials suitable for use as encapsulation barriers in electronic devices. In one embodiment, for example, there is provided an electroluminescent device or other electronic device encapsulated by alternating layers of a silicon-containing bonding material and a ceramic material. The encapsulation methods provide, for example, electronic devices with increased stability and shelf-life. The invention is useful, for example, in the field of microelectronic devices. | 02-16-2012 |
20120119641 | OUTPUT EFFICIENCY OF ORGANIC LIGHT EMITTING DEVICES - The invention provides methods and materials suitable for increasing the output efficiency of light emitting diodes (LEDs), particularly organic LEDs (OLEDs). In one embodiment, for example, there is described a method for providing a porous coating over an OLED stack. The porous coating reduces optical loss and improves light extraction efficiency from the OLED device. | 05-17-2012 |
20120299462 | LOW COST HIGH EFFICIENCY TRANSPARENT ORGANIC ELECTRODES FOR ORGANIC OPTOELECTRONIC DEVICES - The disclosure provides methods and materials for decreasing the cost and increasing the efficiency of electroluminescent devices. The disclosure also provides electroluminescent devices prepared by such methods. In one embodiment, for example, there is provided a method for preparing an electroluminescent device comprising two metal electrodes, an electroluminescent layer, an optical/insulating layer, and a conductive layer, all of which are disposed on a transparent substrate. One of the electrodes is patterned, and the optical/insulating layer comprises vias to allow conduction between the patterned electrode and the conductive layer. | 11-29-2012 |
20130069105 | METHOD FOR ENCAPSULATION OF ORGANIC ELECTRONIC DEVICES - The disclosure provides methods and materials for efficiently encapsulating electronic devices such as organic electroluminescent devices. The disclosure also provides electronic devices prepared by such methods. In one embodiment, for example, there is provided a method for preparing an electroluminescent device comprising forming a groove in a substrate and/or forming a groove in an encapsulation layer, depositing a desiccant in the groove or grooves, and bonding the substrate to the encapsulation layer. | 03-21-2013 |
20130214254 | Cavity Electroluminescent Devices with Integrated Microlenses - Herein is provided electroluminescent devices, and methods for their use and production. In some embodiments, the devices contain embedded optical features that act as lenses to direct photons emitted from an electroluminescent material. The lensing effect from the optical features allows increased light extraction from the devices compared with devices lacking such features. In some embodiments the devices are prepared using a plurality of etching and deposition steps. | 08-22-2013 |
20140167020 | Passive Matrix Organic Light Emitting Diodes - A passive matrix OLED display comprises an array of individually addressable OLED pixels arranged in column and row lines in an imaging area of the display, wherein at least one OLED pixel comprises at least one rectifying component connected in series with an electroluminescent diode, and wherein the at least one OLED pixel has an extended pixel on-time compared with a similar pixel lacking the at least one rectifying component. | 06-19-2014 |