Invention Grant
- Patent Title: Light-emitting element, lighting device, light-emitting device, and electronic device
- Patent Title (中): 发光元件，照明装置，发光装置和电子装置
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Application No.: US14313356Application Date: 2014-06-24
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Publication No.: US09130182B2Publication Date: 2015-09-08
- Inventor: Hiromi Seo , Tatsuyoshi Takahashi
- Applicant: Semiconductor Energy Laboratory Co., Ltd.
- Applicant Address: JP
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP
- Agency: Husch Blackwell LLP
- Priority: JP2013-135716 20130628
- Main IPC: H01L29/72
- IPC: H01L29/72 ; H01L51/50 ; H01L51/52
Abstract:
A light-emitting element with high emission efficiency is provided. A light-emitting element with a long lifetime is provided. The light-emitting element includes an anode; a hole-transport layer over the anode, containing a hole-transport compound and a compound; a light-emitting layer over the hole-transport layer, containing a host material and a guest material; and a cathode over the light-emitting layer. The host material is an electron-transport compound. The guest material and the compound are each independently a phosphorescent compound or a thermally activated delayed fluorescence material. A peak of an emission spectrum of the compound is on a shorter wavelength side than a peak of an emission spectrum of the guest material. Only the guest material emits light.
Public/Granted literature
- US20150001502A1 Light-Emitting Element, Lighting Device, Light-Emitting Device, and Electronic Device Public/Granted day:2015-01-01
Information query
IPC分类:
