Invention Grant
- Patent Title: Light-emitting element, light-emitting device, display device, electronic appliance, and lighting device
- Patent Title (中): 发光元件，发光装置，显示装置，电子设备和照明装置
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Application No.: US13804508Application Date: 2013-03-14
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Publication No.: US09299942B2Publication Date: 2016-03-29
- Inventor: Hiromi Seo , Satoshi Seo
- 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: JP2012-081141 20120330
- Main IPC: H01L51/50
- IPC: H01L51/50
Abstract:
Provided is a light-emitting element with a small degree of luminance degradation with accumulation of driving time (a long-lifetime light-emitting element). Provided is a light-emitting element in which a light-emitting layer with an electron-transport property is formed with a plurality of layers containing different host materials. Further, the LUMO level of a host material on an anode side is higher than the LUMO level of a host material on a cathode side. With such a structure, it is possible to provide a long-lifetime light-emitting element with little degradation in luminance with accumulation of driving time.
Public/Granted literature
- US20130256637A1 Light-Emitting Element, Light-Emitting Device, Display Device, Electronic Appliance, and Lighting Device Public/Granted day:2013-10-03
Information query
IPC分类:
