Multiple dopant emissive layer oleds
AssigneeUniversal Display Corporation
InventorsVadim Adamovich, Michael S. Weaver, Min-Hao Michael Lu
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Abstract
An organic light emitting device comprising, an anode, a cathode, and an emissive layer, located between the anode and the cathode, of a host compound, a first compound capable of phosphorescent emission at room temperature, and a second compound capable of phosphorescent emission at room temperature is provided. At least 95 percent of emission from the device is produced from the second compound when an appropriate voltage is applied across the anode and cathode.
Claims49
An organic light emitting device, comprising an anode, a cathode, and an emissive layer, wherein the emissive layer is located between the anode and the cathode, and the emissive layer comprises:
- a host compound;
- a first compound capable of phosphorescent emission at room temperature;
- and
- a second compound capable of phosphorescent emission at room temperature;
- wherein there is at least one voltage at which at least 95 percent of emission from the device is produced from the second compound with a luminance of at least 10 cd/m2, when the at least one voltage is applied across the anode and the cathode.
An organic light emitting device comprising an anode, a cathode, and an emissive layer, wherein the emissive layer is located between the anode and the cathode, and the emissive layer comprises:
- a host compound;
- a first compound capable of phosphorescent emission at room temperature;
- and
- a second compound capable of phosphorescent emission at room temperature;
- wherein there is at least one voltage at which the device has a CIE that is substantially the same as that of a second device, when the least one voltage is applied across the anode and the cathode, wherein the second device differs from the device only in that the second device has an emissive layer that does not contain the first compound.
A method for producing light emission from an organic light emitting device, comprising:
- obtaining an organic light emitting device comprising an anode, a cathode, and an emissive layer, wherein the emissive layer is located between the anode and the cathode, and the emissive layer comprises:
- a host compound;
- a first compound capable of phosphorescent emission at room temperature;
- and
- a second compound capable of phosphorescent emission at room temperature;
- and
- applying a voltage across the anode and the cathode sufficient to produce emission with a luminance of at least 10 cd/m2 from the device, wherein at least 95 percent of the emission is produced from the second compound.
A method for producing light emission from an organic light emitting device, comprising:
- obtaining an organic light emitting device comprising an anode, a cathode, and an emissive layer, wherein the emissive layer is located between the anode and the cathode, and the emissive layer comprises:
- a host compound;
- a first compound capable of phosphorescent emission at room temperature;
- and
- a second compound capable of phosphorescent emission at room temperature;
- and
- applying a voltage across the anode and the cathode sufficient to produce emission from the device, wherein the device emission has a CIE that is substantially the same as that of a second device that differs from the device only in that the second device has an emissive layer that does not contain the first compound.
An organic light emitting device comprising an anode, a cathode, and an emissive layer, wherein the emissive layer is located between the anode and the cathode, and the emissive layer comprises:
- a host compound;
- a first compound capable of phosphorescent emission at room temperature;
- and
- a second compound capable of phosphorescent emission at room temperature;
- wherein at least 95 percent of emission from the device is produced from the second compound over the normal luminance range of the device.
An organic light emitting device comprising an anode, a cathode, and an emissive layer, wherein the emissive layer is located between the anode and the cathode, and the emissive layer comprises:
- a host compound;
- a first compound capable of phosphorescent emission at room temperature;
- and
- a second compound capable of phosphorescent emission at room temperature;
- wherein the device has a CIE that is substantially the same over the normal luminance range of the device as that of a second device, wherein the second device differs from the device only in that the second device has an emissive layer that does not contain the first compound.
Dependencies are inferred from the claim text.