Invention Grant
- Patent Title: Light-emitting element, light-emitting device, electronic device, and lighting device
- Patent Title (中): 发光元件,发光元件,电子元件及照明器具
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Application No.: US13051104Application Date: 2011-03-18
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Publication No.: US09023491B2Publication Date: 2015-05-05
- Inventor: Hiromi Nowatari , Satoshi Seo
- Applicant: Hiromi Nowatari , Satoshi Seo
- 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: JP2010-066296 20100323
- Main IPC: H01L51/54
- IPC: H01L51/54 ; C09K11/06 ; H01L51/50 ; H01L51/00

Abstract:
Provided are a light-emitting element in which a driving voltage increase can be suppressed and a light-emitting device which has reduced power consumption by including the light-emitting element. The element includes an EL layer between an anode and a cathode, and has a first, a second, and a third layer between the cathode and the EL layer. The first layer is between and in contact with the cathode and the second layer and includes a hole-transport substance. The second layer is between and in contact with the first the third layers and includes a phthalocyanine-based material. The third layer is between and in contact with the second and EL layers and includes an alkali metal, an alkaline-earth metal, a rare-earth metal, an alkali metal compound, an alkaline-earth metal compound, or a rare-earth metal compound. The phthalocyanine-based material has a metal-oxygen bond.
Public/Granted literature
- US20110233530A1 Light-Emitting Element, Light-Emitting Device, Electronic Device, and Lighting Device Public/Granted day:2011-09-29
Information query
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