OLEDs doped with phosphorescent compounds
First Claim
1. An organic light emitting device comprising a single or double heterostructure comprising an emissive layer,wherein the emissive layer is a charge carrying layer comprising a charge carrying material and a phosphorescent material, wherein the phosphorescent material is present at a lower concentration than the charge carrying material, and wherein the phosphorescent material is capable of capturing exciton triplet energy from the charge carrying material, andwherein the phosphorescent material emits phosphorescent radiation from a triplet molecular excited state when a voltage is applied across the device.
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Abstract
Organic light emitting devices are disclosed which are comprised of a heterostructure for producing electroluminescence wherein the heterostructure is comprised of an emissive layer containing a phosphorescent dopant compound. For example, the phosphorescent dopant compound may be comprised of platinum octaethylporphine (PtOEP), which is a compound having the chemical structure with the formula:
73 Citations
16 Claims
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1. An organic light emitting device comprising a single or double heterostructure comprising an emissive layer,
wherein the emissive layer is a charge carrying layer comprising a charge carrying material and a phosphorescent material, wherein the phosphorescent material is present at a lower concentration than the charge carrying material, and wherein the phosphorescent material is capable of capturing exciton triplet energy from the charge carrying material, and wherein the phosphorescent material emits phosphorescent radiation from a triplet molecular excited state when a voltage is applied across the device.
- 11. An organic light emitting device, comprising an anode, a cathode, and an emissive layer between the anode and the cathode, wherein the emissive layer comprises a phosphorescent material and a charge carrying host material, wherein the phosphorescent material is capable of a photoluminescent quantum yield greater than 50 percent in the solid state, and the phosphorescent material emits phosphorescent radiation from a triplet molecular excited state at room temperature when a voltage is applied across the organic light emitting device.
Specification