发明授权
- 专利标题: Organic electroluminescent device
- 专利标题(中): 有机电致发光器件
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申请号: US10573786申请日: 2004-09-21
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公开(公告)号: US07582364B2公开(公告)日: 2009-09-01
- 发明人: Osamu Yoshitake , Hiroshi Miyazaki , Daisuke Suzaki , Yu Yamada
- 申请人: Osamu Yoshitake , Hiroshi Miyazaki , Daisuke Suzaki , Yu Yamada
- 申请人地址: JP Tokyo
- 专利权人: Nippon Steel Chemical Co., Ltd.
- 当前专利权人: Nippon Steel Chemical Co., Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: Birch, Stewart, Kolasch & Birch, LLP
- 优先权: JP2003-338081 20030929
- 国际申请: PCT/JP2004/013752 WO 20040921
- 国际公布: WO2005/030901 WO 20050407
- 主分类号: H01L51/54
- IPC分类号: H01L51/54
摘要:
This invention provides an organic electroluminescent element (organic EL element) utilizing phosphorescence which emits light efficiently with high luminance at low current density, shows good driving stability and is applicable to display devices such as flat panel displays and illuminating devices. The element comprises an anode, organic layers and a cathode piled one upon another on a substrate, at least one of the organic layers is a light-emitting layer containing a host material and a dopant material and a pyrazole-derived compound having 2-4 pyrazole structures represented by the following formula I in the same molecule is used as said host material; wherein, Ar1-Ar3 are independently hydrogen or substituted or unsubstituted aromatic hydrocarbon groups and at least one of Ar1-Ar3 is a group other than hydrogen.
公开/授权文献
- US20070012935A1 Organic electroluminescent device 公开/授权日:2007-01-18