Invention Grant
- Patent Title: Light-emitting element, light-emitting device, electronic device, and lighting device
-
Application No.: US16558209Application Date: 2019-09-02
-
Publication No.: US11139445B2Publication Date: 2021-10-05
- Inventor: Hiromi Nowatari , Satoshi Seo , Nobuharu Ohsawa , Tetsuo Tsutsui
- Applicant: Semiconductor Energy Laboratory Co., Ltd.
- Applicant Address: JP Atsugi
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP Atsugi
- Agency: Robinson IP Law Office, P.C.
- Agent Eric J. Robinson
- Priority: JP2008-306153 20081201,JP2009-130539 20090529
- Main IPC: H01L51/50
- IPC: 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
- US20190386236A1 LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE Public/Granted day:2019-12-19
Information query
IPC分类: