Abstract: Disclosed is an OLED device comprising a light-emitting layer (LEL) containing a host and a dopant located between a cathode and an anode wherein the emitter is an orange-red light emitting rubrene derivative represented by formula (I): wherein: a) there are identical aromatic groups at the 2- and 8-positions; b) the phenyl rings in the 5- and 11-positions contain only para-substituents identical to the aromatic groups in paragraph a); and c) the phenyl rings in the 6- and 12-positions are substituted or not.

Abstract: A tandem OLED includes an anode, a cathode, and at least two electroluminescent units disposed between the anode and the cathode, wherein each of the electroluminescent units includes at least one hole-injecting layer, one hole-transporting layer, one organic light-emitting layer, one electron-transporting layer, and one electron-injecting layer. The OLED also includes at least one intermediate connector, wherein each of the intermediate connectors includes at least one layer, and wherein each of the intermediate connectors is disposed between electroluminescent units, wherein the thickness of each layer in each of the electroluminescent units and the intermediate connectors is selected to satisfy the test condition that the voltage drop from the anode to the cathode is less than 4.0 V×N (the number of electroluminescent units) at 20 mA/cm2.

Abstract: Disclosed is an OLED device comprising a light-emitting layer (LEL) containing a host and a dopant located between a cathode and an anode wherein the emitter is an orange-red light emitting rubrene derivative represented by formula (II): wherein: a) there are identical branched alkyl or non-aromatic carbocyclic groups at the 2- and 8-positions; b) the phenyl rings in the 5- and 11-positions contain only para-substituents identical to the branched alkyl or non-aromatic carbocyclic groups in paragraph a); and c) the phenyl rings in the 6- and 12-positions are substituted.

Abstract: Disclosed is an OLED device comprising a light-emitting layer (LEL) containing a host and a dopant located between a cathode and an anode wherein the emitter is an orange-red light emitting rubrene derivative represented by formula (I): wherein: a) there are identical oxy, aza or thio groups at the 2- and 8-positions; b) the phenyl rings in the 5- and 11-positions contain only para-substituents identical to the oxy, aza or thio groups in paragraph a); c) the phenyl rings in the 6- and 12-positions are substituted; and provided that when a single substituent on both phenyl rings in paragraph c) are present, said substituent is not a methoxy group located at the para-position.

Abstract: A white light-emitting OLED device including a spaced anode and cathode, a hole-transporting layer disposed over the anode, and a first light-emitting layer disposed on the hole-transporting layer including an electron-transporting material host and a yellow dopant for producing yellow light. The device also includes a second light-emitting layer disposed on the first light-emitting layer and including a blue host and a blue dopant for producing blue light, and an electron-transporting layer disposed between the cathode and the second light-emitting layer.

Abstract: A color OLED display having at least three different colored microcavity pixels, each including a light reflective structure and a semi-transparent structure includes an array of light-emitting microcavity pixels each having one or more common organic light-emitting layers, said light-emitting layer(s) including first and second light-emitting materials, respectively, that produce different light spectra, the first light-emitting material producing light having a first spectrum portion that extends between first and second different colors of the array, and the second light-emitting material producing light having a second spectrum portion that is substantially contained within a third color that is different from the first and second colors, and each different colored pixel being tuned to produce light in one of the three different colors whereby the first, second, and third different colors are produced by the OLED display.

Abstract: An organic light-emitting diode (OLED) device which produces substantially white light includes an anode; a hole-transporting layer disposed over the anode; and a blue light-emitting layer having a host doped with a blue light-emitting compound disposed directly on the hole-transporting layer and the blue light-emitting layer being doped with an electron-transporting or a hole-transporting material or both selected to improve efficiency and operational stability. The device also includes an electron-transporting layer disposed over the blue light-emitting layer; a cathode disposed over the electron-transporting layer; and the hole-transporting layer or electron-transporting layer, or both the hole-transporting layer and electron-transporting layer, being selectively doped with a compound which emits light in the yellow region of the spectrum which corresponds to an entire layer or a partial portion of a layer in contact with the blue light-emitting layer.

Abstract: A stabilized OLED device for emitting light of a specific color includes a metallic anode and a metallic cathode spaced from the metallic anode. The device also includes a light-emitting layer including a host and a dopant, the dopant selected to produce light having a spectrum including light of the specific color, and a stabilizer provided in one of the device layers which improves the useful lifetime of the OLED device, wherein the stabilizer has an emission spectrum different from that of the light-emitting layer. One of the electrode layers is semitransparent and the other one is substantially opaque and reflective such that the stabilized OLED device forms a microcavity that emits a narrow band light with the specific color.

Abstract: Organic light-emitting diodes (OLEDs) that produce white light include an anode, a hole-transporting layer disposed over the anode, a blue light-emitting layer disposed over the hole-transporting layer, an electron-transporting layer disposed over the blue light-emitting layer, and a cathode disposed over the electron-transporting layer. The hole-transporting layer is doped with both a yellow-emitting and a red-emitting dopant. When used together with red, green, and blue color filters, the OLEDs produce red, green, and blue light with good color quality and high efficiency. Also disclosed are multicolor display devices utilizing the OLEDs together with color filters or together with both color filters and liquid-crystal light valves.

Abstract: A white light-emitting OLED device including a spaced anode and cathode, a hole-transporting layer disposed over the anode, and a first light-emitting layer disposed on the hole-transporting layer including an electron-transporting material host and a yellow dopant for producing yellow light. The device also includes a second light-emitting layer disposed on the first light-emitting layer and including a blue host and a blue dopant for producing blue light, and an electron-transporting layer disposed between the cathode and the second light-emitting layer.

Abstract: An organic light-emitting diode (OLED) device which produces substantially white light includes an anode; a hole-transporting layer disposed over the anode; and a blue light-emitting layer having a host doped with a blue light-emitting compound disposed directly on the hole-transporting layer and the blue light-emitting layer being doped with an electron-transporting or a hole-transporting material or both selected to improve efficiency and operational stability. The device also includes an electron-transporting layer disposed over the blue light-emitting layer; a cathode disposed over the electron-transporting layer; and the hole-transporting layer or electron-transporting layer, or both the hole-transporting layer and electron-transporting layer, being selectively doped with a compound which emits light in the yellow region of the spectrum which corresponds to an entire layer or a partial portion of a layer in contact with the blue light-emitting layer.

Abstract: A method of forming a compacted pellet of organic materials adaptable for making an organic layer on a structure which will form part of an OLED display, includes providing a sublimable organic material in a powder form; providing a thermally insulating and non-sublimable inorganic material in a powder form; forming a mixture of the sublimable organic powder and thermally insulating and non-sublimable inorganic powder; placing such mixture into a die and using two punches, a lower and an upper punch, to apply sufficient pressure to the mixture to cause the mixture of powders to consolidate into a solid pellet; applying heat to the die during or prior to applying pressure by the opposing punches to aid in causing the mixture of powders to consolidate into a solid compacted pellet, and removing the pellet from the die.

Abstract: A method for depositing two or more emission layers in a white light emitting OLED device wherein each emission layer is formed by the steps including providing a solid compacted pellet of organic material including a mixture of at least one organic host and one organic dopant; placing such a solid compacted pellet of organic material inside a receptacle disposed in a physical vapor deposition chamber; positioning a substrate of a partially formed OLED device in the physical vapor deposition chamber in a spaced relationship with respect to the receptacle; evacuating the chamber to a reduced pressure; and applying heat to a surface of the solid compacted pellet of organic material disposed in the receptacle to cause at least a portion to sublime to provide a mixture of vapors of the organic materials including the host and the dopant to form an emission layer on the substrate.

Abstract: Disclosed is an OLED device comprising a light emitting layer containing an electroluminescent component having a first bandgap and at least two non-electroluminescent components having second and further bandgaps, respectively, as more fully described in the summary of the invention.

Abstract: Disclosed are organic electroluminescent devices comprising a substrate, an anode and a cathode disposed over the substrate, an emission layer (EML) disposed between the anode and the cathode, a hole-transport layer (HTL) disposed between the anode and the emission layer, and an electron-transport layer (ETL) disposed between the cathode and the emission layer. The EML and either the HTL, the ETL, or both the HTL and the ETL include a derivative of anthracene as a color-neutral dopant. A color-neutral dopant is a dopant whose presence does not alter the electroluminescent color of the device.

Abstract: A solid compacted pellet of organic material for use in a vapor deposition source, and a method of making same is disclosed. The solid compacted pellet includes: a support member for permitting rotation of the pellet, or transmitting cooling fluid, or both; and a compacted solid core of organic material molded onto and about the support member.

Abstract: An organic light-emitting diode (OLED) device which produces substantially white light includes a substrate; an anode disposed over the substrate; and a hole injecting layer disposed over the anode. The device further includes a hole-transport layer disposed over the hole injecting layer; a yellow light-emitting layer having rubrene or a derivative thereof greater than 50% by volume of the constituents of such yellow light-emitting layer that emits light in the yellow region of the spectrum and is disposed on the hole-transport layer; a light-emitting layer doped with a blue light-emitting compound, disposed directly on the yellow light-emitting layer; an electron-transport layer disposed over the blue light-emitting layer; and a cathode disposed over the electron-transport layer.

Abstract: An organic light-emitting diode (OLED) device which produces substantially white light including a substrate, an anode disposed over the substrate, and a hole injecting layer disposed over the anode. The device also includes a hole-transporting layer disposed over the hole injecting layer, a blue light-emitting layer doped with a blue light-emitting compound disposed directly on the hole-transporting layer, and an electron-transporting layer disposed over the blue light-emitting layer. The device further includes a cathode disposed over the electron-transporting layer and the hole-transporting layer or electron-transporting layer, or both the hole-transporting layer and electron-transporting layer, being selectively doped with super rubrene or derivatives thereof which emits light in the yellow region of the spectrum which corresponds to an entire layer or a partial portion of a layer in contact with the blue light-emitting layer.

Abstract: A method of compacting moisture-sensitive organic material adaptable for making an organic layer on a structure which will form part of an organic light-emitting device, includes placing such a desiccant material in a powder form inside a die cavity and applying a pressure to such a desiccant powder in the die cavity sufficient to compact into a porous desiccant bed; providing moisture-sensitive organic material in a powder form; and placing such moisture-sensitive organic material inside the die cavity over the porous desiccant bed, and applying sufficient heat to the moisture-sensitive organic material in the die cavity to cause moisture to escape from the moisture-sensitive organic material and be absorbed by the porous desiccant bed, and then applying sufficient pressure to compact the moisture-sensitive organic material into a solid organic pellet.

Abstract: A solid compacted pellet of organic material for use in a vapor deposition source, and a method of making same is disclosed. The solid compacted pellet includes: a support member for permitting rotation of the pellet, or transmitting cooling fluid, or both; and a compacted solid core of organic material molded onto and about the support member.