Invention Grant
- Patent Title: Organic electroluminescent element
- Patent Title (中): 有机电致发光元件
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Application No.: US13980051Application Date: 2012-01-20
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Publication No.: US08847218B2Publication Date: 2014-09-30
- Inventor: Kazuki Nishimura , Yukitoshi Jinde , Toshinari Ogiwara , Tetsuya Inoue , Chishio Hosokawa
- Applicant: Kazuki Nishimura , Yukitoshi Jinde , Toshinari Ogiwara , Tetsuya Inoue , Chishio Hosokawa
- Applicant Address: JP Tokyo
- Assignee: Idemitsu Kosan Co., Ltd.
- Current Assignee: Idemitsu Kosan Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2011-009660 20110120
- International Application: PCT/JP2012/051194 WO 20120120
- International Announcement: WO2012/099241 WO 20120726
- Main IPC: H01L51/50
- IPC: H01L51/50 ; H05B33/14 ; C09B57/00 ; C09B57/10

Abstract:
An organic electroluminescence device includes a pair of electrodes and an organic compound layer interposed therebetween. The organic compound layer includes a plurality of emitting layers including a first emitting layer and a second emitting layer, in which at least one of the first and second emitting layers contains a phosphorescent dopant material, and a space layer between the first and second emitting layers. The space layer contains a compound satisfying a relationship of the following numerical formula (1) in terms of a difference ΔST between singlet energy EgS and an energy gap Eg77K at 77K, [Numerical Formula 1] ΔST=EgS−Eg77K≦0.5 (eV) (1).
Public/Granted literature
- US20130292664A1 ORGANIC ELECTROLUMINESCENT ELEMENT Public/Granted day:2013-11-07
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