Invention Grant
- Patent Title: Light emitting device
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Application No.: US15315110Application Date: 2015-05-22
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Publication No.: US10431760B2Publication Date: 2019-10-01
- Inventor: Makoto Anryu , Nobuhiko Akino
- Applicant: Sumitomo Chemical Company, Limited
- Applicant Address: JP Tokyo
- Assignee: Sumitomo Chemical Company, Limited
- Current Assignee: Sumitomo Chemical Company, Limited
- Current Assignee Address: JP Tokyo
- Agency: Panitch Schwarze Belisario & Nadel LLP
- Priority: JP2014-115533 20140604; JP2014-262000 20141225
- International Application: PCT/JP2015/064766 WO 20150522
- International Announcement: WO2015/186539 WO 20151210
- Main IPC: H01L51/54
- IPC: H01L51/54 ; C09K11/06 ; H01L51/50 ; H01L51/00 ; C07F15/00 ; C08G61/12

Abstract:
A light emitting device excellent in luminance life includes an anode, a cathode, a first organic layer (containing at least one phosphorescent compound) disposed between the anode and cathode and a second organic layer (containing at least one phosphorescent compound and a crosslinked body) disposed between the anode and first organic layer. At least one phosphorescent compound contained in the first and second organic layers is the same phosphorescent compound and is represented by the formula (1): wherein M may be an iridium atom, n1 represents an integer of 1 or more, n2 may be 0 or more, E1 and E2 may be a carbon atom, ring L1 represents an aromatic heterocyclic ring, ring L2 may be an aromatic hydrocarbon ring, A1-G1-A2 represents an anionic bidentate ligand, and at least one of rings L1 and L2 has an aryl group, a monovalent heterocyclic group or a substituted amino group.
Public/Granted literature
- US20170194584A1 LIGHT EMITTING DEVICE Public/Granted day:2017-07-06
Information query
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