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US 11,910,627 B2Granted
Organic light emitting device and organic light emitting display device using the same
AssigneeLG Display Co., Ltd.
InventorsChangeun Kim, Sujeong Lee
Life of this patent
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Abstract
An organic light-emitting device an improved anode structure and an organic electroluminescent display device using the same are provided. The anode structure has a 3 layers stack structure in which a layer closest to an organic light-emissive layer of the organic light-emitting device is made of a material with a high work function such as 5.1 to 5.3 eV. Thus, hole injection efficiency is improved and occurrence of dark spots is suppressed.
Claims15
An organic light-emitting device comprising:
- an anode;
- an organic light-emissive layer on the anode;
- and
- a cathode on the organic light-emissive layer, wherein the anode includes:
- a first layer;
- a second layer on the first layer, wherein the second layer includes a metal;
- and
- a third layer on the second layer, wherein the third layer has a higher work function than a work function of the first layer,
- wherein the third layer includes copper aluminum oxide, wherein the copper aluminum oxide is composed of about 50 to 60% by weight of CuO and about 40 to 50% by weight of AlxGa2−x O3 (O≤x≤2).
6 more elements
An organic electroluminescent display device comprising:
- a first substrate;
- a thin-film transistor on the first substrate;
- an anode on the first substrate having the thin-film transistor, where the anode is electrically coupled to the thin-film transistor;
- an organic light-emissive layer on the anode;
- and
- a cathode on the organic light-emissive layer,
- wherein the anode includes:
- a first layer;
- a second layer on the first layer, wherein the second layer includes a metal;
- and
- a third layer on the second layer, wherein the third layer has a higher work function than a work function of the first layer,
- wherein the third layer includes copper aluminum oxide, wherein the copper aluminum oxide is composed of about 50 to 60% by weight of CuO and about 40 to 50% by weight of AlxGa2−x O3 (0≤x≤2).
9 more elements
Dependencies are inferred from the claim text.