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US 11,706,939 B2Granted
Luminescence device, and display device including same
AssigneeSamsung Display Co., Ltd.
InventorsDongkyu Seo, Wonjong Kim, Yeongrong Park, Hyeongpil Kim, Junghee An, Byeongwook Yoo, Byungseok Lee
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Abstract
A luminescence device includes a first electrode, a first emission portion disposed on the first electrode, a second electrode disposed on the first emission portion, and a capping layer disposed on the second electrode and including a metal atom and a metal halide compound, wherein the metal atom is a lanthanide metal, a transition metal, or a post-transition metal and the metal halide compound is formed by combining an alkali metal atom and a halogen atom.
Claims18
A luminescence device comprising:
- a first electrode;
- a first emission portion on the first electrode;
- a second electrode on the first emission portion and having a first surface facing the first electrode and a second surface facing oppositely away from the first surface;
- a capping layer on the second surface of the second electrode and comprising a metal atom and a metal halide compound;
- and
- an auxiliary capping layer on the capping layer and comprising the metal atom and the metal halide compound and not comprising an organic compound,
- wherein the metal atom contains at least one of a lanthanide metal, a transition metal, or a post-transition metal, and the metal halide compound is formed by combining an alkali metal atom and a halogen atom,
- wherein a volume ratio of the metal atom and the metal halide compound is 1:2, 1:4, or 2:1,
- wherein the second electrode is between the capping layer and the first electrode,
- wherein the capping layer is between the auxiliary capping layer and the second electrode, and
- wherein the auxiliary capping layer is different in refractive index from that of the capping layer.
8 more elements
A luminescence device comprising:
- a first electrode;
- a hole transport region on the first electrode;
- an emission layer on the hole transport region;
- an electron transport region on the emission layer;
- a second electrode on the electron transport region and having a first surface facing the first electrode and a second surface facing oppositely away from the first surface;
- a capping layer on the second surface of the second electrode and comprising a metal atom and a metal halide compound;
- and
- an auxiliary capping layer on the capping layer and comprising the metal atom and the metal halide compound and not comprising an organic compound,
- wherein the metal atom contains at least one of a lanthanide metal, a transition metal, or a post-transition metal and the metal halide compound is formed by combining an alkali metal atom and a halogen atom,
- wherein a volume ratio of the metal atom and the metal halide compound is 1:2, 1:4, or 2:1,
- wherein the second electrode is between the capping layer and the first electrode,
- wherein the capping layer is between the auxiliary capping layer and the second electrode, and
- wherein the auxiliary capping layer is different in refractive index from that of the capping layer.
10 more elements
A display device comprising:
- a thin film transistor;
- and
- a luminescence device on the thin film transistor,
- wherein the luminescence device includes:
- a first electrode,
- a hole transport region on the first electrode,
- an emission layer on the hole transport region,
- an electron transport region on the emission layer,
- a second electrode on the electron transport region and having a first surface facing the first electrode and a second surface facing oppositely away from the first surface,
- a capping layer on the second surface of the second electrode and comprising a metal atom and a metal halide compound, and
- an auxiliary capping layer on the capping layer and comprising the metal atom and the metal halide compound and not comprising an organic compound,
- wherein the metal atom contains at least one of a lanthanide metal, a transition metal, or a post-transition metal and the metal halide compound is formed by combining an alkali metal atom and a halogen atom,
- wherein a volume ratio of the metal atom and the metal halide compound is 1:2, 1:4, or 2:1,
- wherein the second electrode is between the capping layer and the first electrode,
- wherein the capping layer is between the auxiliary capping layer and the second electrode, and
- wherein the auxiliary capping layer is different in refractive index from that of the capping layer.
13 more elements
Dependencies are inferred from the claim text.