Invention Grant
- Patent Title: Light-emitting element, light emitting device, and electronic device
- Patent Title (中): 发光元件，发光元件和电子元件
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Application No.: US13748844Application Date: 2013-01-24
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Publication No.: US09437824B2Publication Date: 2016-09-06
- Inventor: Takahiro Ushikubo , Satoshi Seo , Nobuharu Ohsawa
- 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: JP2008-320918 20081217
- Main IPC: H01L29/08
- IPC: H01L29/08 ; H01L51/00 ; H01L51/50 ; H05B33/14
Abstract:
A light-emitting element includes a light-emitting layer having a two-layer structure in which a first light-emitting layer containing a first light-emitting substance and a second light-emitting layer containing a second light-emitting substance, which is in contact with the first light-emitting layer, are provided between an anode and a cathode. The first light-emitting layer is separated into two layers of a layer provided on the anode side and a layer provided on the cathode side. The layer provided on the anode side contains only a first light-emitting substance, or a first organic compound of less than 50 wt % and the first light-emitting substance of 50 wt % to 100 wt %. The layer provided on the cathode side contains a second organic compound and the first light-emitting substance. The second light-emitting layer, which is provided in contact with the first light-emitting layer, contains the second light-emitting substance and a third organic compound.
Public/Granted literature
- US09312493B2 Light-emitting element, light emitting device, and electronic device Public/Granted day:2016-04-12
Information query
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