OLEDs doped with phosphorescent compounds
First Claim
1. An organic light emitting device, comprising an emissive layer that 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 at room temperature, and the phosphorescent material emits phosphorescent radiation from a triplet molecular excited state when a voltage is applied across the organic light emitting device.
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Abstract
Organic light emitting devices are disclosed, which comprise a heterostructure for producing electroluminescence, wherein the heterostructure comprises an emissive layer containing a phosphorescent dopant compound. For example, the phosphorescent dopant compound may comprise platinum octaethylporphine (PtOEP), which is a compound having the chemical structure with the formula:
56 Citations
11 Claims
- 1. An organic light emitting device, comprising an emissive layer that 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 at room temperature, and the phosphorescent material emits phosphorescent radiation from a triplet molecular excited state when a voltage is applied across the organic light emitting device.
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11. A method for preparing an organic light emitting device, comprising positioning an emissive layer that produces electroluminescence between an anode and a cathode, wherein the emissive material is a phosphorescent material capable of a photoluminescent quantum yield greater than 50 percent in the solid state at room temperature.
Specification