Invention Grant
- Patent Title: Organic EL device
- Patent Title (中): 有机EL器件
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Application No.: US12532369Application Date: 2008-03-24
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Publication No.: US08207526B2Publication Date: 2012-06-26
- Inventor: Kazuki Nishimura , Toshihiro Iwakuma , Kenichi Fukuoka , Yukitoshi Jinde , Chishio Hosokawa
- Applicant: Kazuki Nishimura , Toshihiro Iwakuma , Kenichi Fukuoka , Yukitoshi Jinde , Chishio Hosokawa
- Applicant Address: JP Tokyo
- Assignee: Idemitsu Kosan Co., Ltd.
- Current Assignee: Idemitsu Kosan Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Foley & Lardner LLP
- Priority: JP2007-077611 20070323
- International Application: PCT/JP2008/055383 WO 20080324
- International Announcement: WO2008/123178 WO 20081016
- Main IPC: H01L51/54
- IPC: H01L51/54

Abstract:
A phosphorescent-emitting layer contains a phosphorescent host and a phosphorescent dopant for providing phosphorescence, and a fluorescent-emitting layer contains a fluorescent host and a fluorescent dopant for providing fluorescence. A charge blocking layer blocks electrons injected into the fluorescent host of the fluorescent-emitting layer from being injected toward the charge blocking layer from the fluorescent-emitting layer, and also injects holes into the fluorescent-emitting layer from the phosphorescent-emitting layer. A triplet energy gap EgPD of the phosphorescent dopant of the phosphorescent-emitting layer, a triplet energy gap EgEB of the charge blocking layer and a triplet energy gap EgFH of the fluorescent host of the fluorescent-emitting layer satisfy the following formula (1). EgPD
Public/Granted literature
- US20100044689A1 ORGANIC EL DEVICE Public/Granted day:2010-02-25
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