White oleds employing blue fluorescent emitters and orange phosphorescent excimers
AssigneeArizona Board of Regents on behalf of Arizona State University
InventorJian Li
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Abstract
A white organic light emitting device comprises a first electrode; a hole transporting layer in contact with the first electrode; a second electrode; an electron transporting layer in contact with the second electrode; and an emissive layer between the hole transporting layer and the electron transporting layer. The emissive layer comprises a host, a fluorescent emitter, and a phosphorescent emitter. The fluorescent emitter harvests singlet excitons and emits blue light, and the phosphorescent emitter harvests triplet excitons and emits yellow-amber light.
Claims20
A white organic light emitting device comprising:
- a first electrode;
- a hole transporting layer in contact with the first electrode;
- a second electrode;
- an electron transporting layer in contact with the second electrode;
- and
- an emissive layer between the hole transporting layer and the electron transporting layer, the emissive layer comprising a host, a fluorescent emitter, and a phosphorescent emitter, wherein the fluorescent emitter harvests singlet excitons and emits blue light and wherein the phosphorescent emitter harvests triplet excitons and emits yellow-amber light.
Dependencies are inferred from the claim text.