OLEDs with mixed host emissive layer
First Claim
1. An organic light emitting device comprising:
- an emissive region disposed between and electrically connected to an anode and a cathode, wherein the emissive region comprises;
a first single-host emissive layer, comprising a first non-emissive host material and a phosphorescent dopant, anda mixed-host emissive layer in direct contact with the first single-host emissive layer, comprising the first non-emissive host material, a second non-emissive host material, and the phosphorescent dopant.
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Accused Products
Abstract
An organic light emitting device is provided. The devices of the present invention comprise an emissive region having at least two emissive layers, with at least one layer comprising a first host and another layer comprising a first and a second host, and each layer further comprising a phosphorescent emissive material. In one embodiment, the device comprises an emissive region disposed between and electrically connected to an anode and a cathode, wherein the emissive region comprises (i) a first single-host emissive layer, comprising a first host material, and (ii) a mixed-host emissive layer in direct contact with the first single-host layer, wherein the mixed-host layer comprises the first host material, and a second host material, and wherein the first single-host layer and the mixed-host layer each further comprise a phosphorescent emissive material. In another embodiment, the device further comprises (iii) a second single-host emissive layer, comprising a second host material, and wherein the first single-host layer, the mixed-host layer, and the second single-host layer each further comprise a phosphorescent emissive material.
62 Citations
25 Claims
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1. An organic light emitting device comprising:
an emissive region disposed between and electrically connected to an anode and a cathode, wherein the emissive region comprises; a first single-host emissive layer, comprising a first non-emissive host material and a phosphorescent dopant, and a mixed-host emissive layer in direct contact with the first single-host emissive layer, comprising the first non-emissive host material, a second non-emissive host material, and the phosphorescent dopant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
Specification