Universal Display Corporation

Princeton University

Theodore Zhou

Michael Stewart Weaver

Stephen R Forrest

Paul E Burrows

Changsoon Kim

Michael G Hack

Raymond Kwong

Vladimir Bulovic

Julia J Brown

Brian D'Andrade

Min-Hao Michael Lu

Tan Ngo

Mark A Rothman

Changsoon Princeton University Kim

The present invention provides an OLED with an emissive region comprising a plurality of sets of organic layers, each set comprising a non-continuous emissive layer and a neat non-emissive layer. The present invention also provides an OLED with an emissive region comprising a plurality of sets of organic layers, each set comprising an emissive layer and a neat non-emissive layer, wherein the energy gaps of the emissive layer and the non-emissive layer are not nested. The present invention also provides a method for making OLEDs by depositing on a substrate an anode, a plurality of sets of organic layers, each set comprising an emissive layer and a non-emissive layer wherein each layer is deposited sequentially, and a cathode.

Organic light emitting devices with an emissive region having emissive and non-emissive layers and method of making

An organic light emitting device is provided. The device includes an anode, an organic layer disposed over the anode, a layer comprising an alkaline metal compound disposed over the organic layer, a layer comprising Mg or a Mg-metal alloy disposed over the layer comprising an alkaline metal compound, and a layer comprising a transparent conductive metal oxide disposed over the layer comprising Mg or Mg-metal alloy. A method of fabricating an organic light emitting device is also provided. An organic layer is deposited over an anode. An electron injection enhancement layer consisting essentially of an alkaline metal compound is deposited over the organic layer. A transparent cathode, including a layer of Mg or Mg-metal alloy and a layer of metal oxide, is deposited over the layer of alkaline metal compound. A device fabricated by this process is also provided.

Efficiency transparent cathode

A highly stable and efficient organic light emitting device with a phosphorescent-doped mixed layer architecture comprises an anode layer; hole injecting layer over the anode layer; a mixed layer over the hole injecting layer, the mixed layer comprising an organic small molecule hole transporting material, an organic small molecule electron transporting material and a phosphorescent dopant; and a cathode layer over the mixed layer. An electron transporting layer may be present between the mixed layer and the cathode layer and a hole transporting layer may be present between the hole injecting layer and the mixed layer.

Highly stable and efficient OLEDs with a phosphorescent-doped mixed layer architecture

The present invention relates to patterning methods for organic devices, and more particularly to patterning methods using a die. A first layer of organic materials is deposited over a substrate, followed by a first electrode layer. A first patterned die having a raised portion is then pressed onto the first electrode layer, such that the raised portion of the first patterned die contacts portions of the first electrode layer. The patterned die is removed, such that the portions of the first electrode layer in contact with the raised portions of the first patterned die are removed. In one embodiment of the invention, a second organic layer is then deposited over the first electrode layer, followed by a second electrode layer. A second patterned die having a raised portion is pressed onto the second electrode layer, such that the raised portion of the second patterned die contacts portions of the second electrode layer. The second patterned die is removed, such that the portions of the second electrode layer in contact with the raised portions of the second patterned die are removed. Preferably the patterned die is coated with an adhesive material such as a metal.

Method for patterning devices

A photoresist mask is provided, having a central region fabricated on an underlying layer. An overhang supported by the central region is separated from the underlying layer by a recessed area. The recessed area has an aspect ratio of at least about 1.5. The mask may be advantageously used to pattern electrodes deposited through the mask by chemical vapor deposition or sputtering, such that there is no significant conductivity across the mask between the patterned electrodes.

Mask for patterning devices

Method for patterning organic thin film devices using a die

An organic light emitting device is provided. The device has a first electrode, an insulating strip disposed over the first electrode, and a bus line disposed on top of the insulating strip, such that the bus line is electrically insulated from the first electrode by the insulating strip. An integrated mask is disposed over the bus line, such that a portion of the bus line remains exposed vis-a-vis the insulating strip and the integrated mask. An organic layer is disposed over the first electrode, such that the organic layer is electrically connected to the first electrode. A second electrode is disposed over the organic layer, such that the second electrode is electrically connected to the organic layer, and such that the second electrode is electrically connected to the exposed portion of the bus line. A method of fabricating the device is also provided, which involves depositing the organic layer and the second electrode through the integrated mask, such that the second electrode is in electrical contact with the bus line.

Growing community of inventors

Princeton, NJ, United States of America

Theodore Zhou