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.: US13415055Application Date: 2012-03-08
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Publication No.: US08835973B2Publication Date: 2014-09-16
- Inventor: Hiromi Nowatari , Satoshi Seo , Nobuharu Ohsawa , Tetsuo Tsutsui
- Applicant: Hiromi Nowatari , Satoshi Seo , Nobuharu Ohsawa , Tetsuo Tsutsui
- Applicant Address: JP Atsugi-shi, Kanagawa-ken
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP Atsugi-shi, Kanagawa-ken
- Agency: Robinson Intellectual Property Law Office, P.C.
- Agent Eric J. Robinson
- Priority: JP2008-306153 20081201; JP2009-130539 20090529
- Main IPC: H01L33/00
- IPC: H01L33/00 ; H01L27/15 ; H01L51/50 ; H01L51/00

Abstract:
Light-emitting elements in which an increase of driving voltage can be suppressed are provided. Light-emitting devices whose power consumption is reduced by including such light-emitting elements are also provided. In a light-emitting element having an EL layer between an anode and a cathode, a first layer in which carriers can be produced is formed between the cathode and the EL layer and in contact with the cathode, a second layer which transfers electrons produced in the first layer is formed in contact with the first layer, and a third layer which injects the electrons received from the second layer into the EL layer is formed in contact with the second layer.
Public/Granted literature
- US20120168738A1 LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE Public/Granted day:2012-07-05
Information query
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