Invention Grant
- Patent Title: Organic electroluminescent device
- Patent Title (中): 有机电致发光器件
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Application No.: US13578942Application Date: 2011-01-27
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Publication No.: US08986858B2Publication Date: 2015-03-24
- Inventor: Masashi Tada , Junya Ogawa , Takahiro Kai , Megumi Matsumoto , Yasuhisa Tsutsumi
- Applicant: Masashi Tada , Junya Ogawa , Takahiro Kai , Megumi Matsumoto , Yasuhisa Tsutsumi
- Applicant Address: JP Tokyo
- Assignee: Nippon Steel & Sumikin Chemical Co., Ltd.
- Current Assignee: Nippon Steel & Sumikin Chemical Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Cheng Law Group, PLLC
- Priority: JP2010-042295 20100226
- International Application: PCT/JP2011/051640 WO 20110127
- International Announcement: WO2011/105161 WO 20110901
- Main IPC: H01L51/50
- IPC: H01L51/50 ; C07D403/10 ; C07D209/86 ; C07D401/14 ; C07D403/14 ; C07D405/14 ; C07D409/14 ; H01L51/00

Abstract:
Disclosed is an organic electroluminescent device (organic EL device) that is improved in luminous efficiency, sufficiently secures driving stability, and has a simple configuration. This organic EL device comprises organic layers between an anode and a cathode piled one upon another on a substrate and at least one organic layer selected from a light-emitting layer, a hole-transporting layer, an electron-transporting layer, and a hole-blocking layer contains a carbazole compound represented by the following formula (1). In the case where the light-emitting layer of the organic electroluminescent device contains a phosphorescent dopant and a host material, it is the carbazole compound that is contained as the host material. In formula (1), X is C—Y or a nitrogen atom; Y is a hydrogen atom, an alkyl group, a cycloalkyl group, or an aromatic group; n is an integer of 2 to 4: A is an n-valent aromatic group; L is a direct bond or a divalent aromatic group; and R is a hydrogen atom, an alkyl group, or a cycloalkyl group.
Public/Granted literature
- US20120319095A1 ORGANIC ELECTROLUMINESCENT DEVICE Public/Granted day:2012-12-20
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