Invention Grant
- Patent Title: Light-emitting element, light-emitting device, electronic device, and lighting device
-
Application No.: US17153985Application Date: 2021-01-21
-
Publication No.: US11889711B2Publication Date: 2024-01-30
- Inventor: Hiromi Nowatari , Satoshi Seo , Nobuharu Ohsawa , Takahiro Ushikubo , 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 Intellectual Property Law Office, P.C.
- Agent Eric J. Robinson
- Priority: JP 09131096 2009.05.29
- The original application number of the division: US16006024 2018.06.12
- Main IPC: B32B15/01
- IPC: B32B15/01 ; H10K50/13 ; B82Y10/00 ; H10K50/11 ; H10K50/19 ; H10K85/20 ; H10K85/30 ; H10K85/60 ; H10K101/40

Abstract:
An object is to provide a light-emitting element capable of emitting light with a high luminance even at a low voltage, and having a long lifetime. The light-emitting element includes n EL layers between an anode and a cathode (n is a natural number of two or more), and also includes, between m-th EL layer from the anode and (m+1)-th EL layer (m is a natural number, 1≤m≤n−1), a first layer including a first donor material in contact with the m-th EL layer, a second layer including an electron-transport material and a second donor material in contact with the first layer, and a third layer including a hole-transport material and an acceptor material in contact with the second layer and the (m+1)-th EL layer.
Public/Granted literature
- US20210143354A1 LIGHT-EMITTING ELEMENT, LIGHT-EMITTING DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE Public/Granted day:2021-05-13
Information query