Invention Grant
- Patent Title: Light emitting device and electronic appliance using the same
- Patent Title (中): 发光装置及使用其的电子设备
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Application No.: US11431648Application Date: 2006-05-09
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Publication No.: US07960038B2Publication Date: 2011-06-14
- Inventor: Nobuharu Ohsawa , Hideko Inoue , Satoshi Seo , Satoko Shitagaki
- Applicant: Nobuharu Ohsawa , Hideko Inoue , Satoshi Seo , Satoko Shitagaki
- 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: JP2005-148777 20050520
- Main IPC: H01L51/54
- IPC: H01L51/54 ; H05B33/12

Abstract:
The light emitting element includes a first electrode and a second electrode, between which a light emitting layer, a hole transporting layer provide in contact with the light emitting layer, an electron transporting layer provided in contact with the light emitting layer, and a mixed layer provided between the electron transporting layer and the second electrode. The mixed layer includes an electron transporting substance and a substance showing an electron donating property with respect to the electron transporting substance. The light emitting layer includes an organometallic complex represented in General Formula (1) and a host. R1 and R2 each represent an electron-withdrawing substituent group. R3 and R4 each represent any of hydrogen or an alkyl group having 1 to 4 carbon atoms. L represents any of a monoanionic ligand having a beta-diketone structure, a monoanionic bidentate chelating ligand having a carboxyl group, or a monoanionic bidentate chelating ligand having a phenolic hydroxyl group.
Public/Granted literature
- US20060263636A1 Light emitting device and electronic appliance using the same Public/Granted day:2006-11-23
Information query
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