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US 2018/0019445 A1Published application
Light-Emitting Element, Display Module, Lighting Module, Light-Emitting Device, Display Device, Electronic Device, and Lighting Device
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsTsunenori Suzuki, Shogo UESAKA, Ryohei YAMAOKA, Satoshi SEO
Life of this patent
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Abstract
A tandem light-emitting element in which generation of crosstalk can be suppressed even when the element is applied to a high-definition display is provided. In the tandem light-emitting element, a layer in contact the anode side of an intermediate layer contains 2,9-bis(naphthalen-2-yl)-4,7-diphenyl-1,10-phenanthroline (abbreviation: NBPhen).
Claims22
(canceled)
A light-emitting element comprising:
- a first electrode;
- a first light-emitting layer over the first electrode;
- a first layer over the first light-emitting layer;
- an electron-injection buffer region over the first layer, the electron-injection buffer region comprising:
- a layer comprising an alkali metal element;
- and
- an electron-relay region over the layer containing an alkali metal element;
- a first charge generation region over the electron-injection buffer region;
- and
- a second light-emitting layer over the first charge generation region,
- a second electrode over the second light-emitting layer,
- wherein the first layer comprises a compound represented by the following Formula (iv):
9 more elements
A light-emitting element comprising:
- a first electrode;
- a first light-emitting layer over the first electrode;
- a first layer over the first light-emitting layer;
- an electron-injection buffer region over the first layer, the electron-injection buffer region comprising:
- a layer comprising an alkali metal element;
- and
- an electron-relay region over and in contact with the layer containing an alkali metal element;
- a first charge generation region over and in contact with the electron-injection buffer region;
- and
- a second light-emitting layer over the first charge generation region,
- a second electrode over the second light-emitting layer,
- wherein the first layer comprises a compound represented by the following Formula (iv):
9 more elements
Dependencies are inferred from the claim text.