OLEDS DOPED WITH PHOSPHORESCENT COMPOUNDS
First Claim
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1. An organic light emitting device comprising:
- an anode, a hole transporting layer, an emissive layer, an electron transporting layer and a cathode, wherein;
the emissive layer is the electron transporting layer, the emissive layer is the hole transporting layer, or the emissive layer is a separate charge-carrying layer between the electron transporting layer and the hole transporting layer;
the emissive layer comprises a charge-carrying material and a phosphorescent material;
the phosphorescent material is present in the emissive layer at a lower concentration than 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.
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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:
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Citations
19 Claims
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1. An organic light emitting device comprising:
- an anode, a hole transporting layer, an emissive layer, an electron transporting layer and a cathode, wherein;
the emissive layer is the electron transporting layer, the emissive layer is the hole transporting layer, or the emissive layer is a separate charge-carrying layer between the electron transporting layer and the hole transporting layer; the emissive layer comprises a charge-carrying material and a phosphorescent material; the phosphorescent material is present in the emissive layer at a lower concentration than 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- an anode, a hole transporting layer, an emissive layer, an electron transporting layer and a cathode, wherein;
Specification