Invention Grant
- Patent Title: Organic electroluminescence element
- Patent Title (中): 有机电致发光元件
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Application No.: US12527224Application Date: 2008-02-06
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Publication No.: US09000419B2Publication Date: 2015-04-07
- Inventor: Yasuhiro Iizumi , Atsushi Oda , Junji Kido , Toshitaka Mori
- Applicant: Yasuhiro Iizumi , Atsushi Oda , Junji Kido , Toshitaka Mori
- Applicant Address: JP Tokyo-to JP Yamagata-shi
- Assignee: Dai Nippon Printing Co., Ltd,Yamagata Promotional Organization for Industrial Technology
- Current Assignee: Dai Nippon Printing Co., Ltd,Yamagata Promotional Organization for Industrial Technology
- Current Assignee Address: JP Tokyo-to JP Yamagata-shi
- Agency: Ladas & Parry LLP
- Priority: JP2007-038600 20070219
- International Application: PCT/JP2008/051924 WO 20080206
- International Announcement: WO2008/102644 WO 20080828
- Main IPC: H01L29/08
- IPC: H01L29/08 ; H01L51/10 ; H01L29/04 ; H01L51/50 ; H01L51/52 ; H01L51/00

Abstract:
An organic EL element which has no layer that prevents penetration of holes and electrons to the counter electrode. The organic EL element includes: an anode, a hole injecting and transporting layer formed on the anode, a light emitting layer formed on the hole injecting and transporting layer, an electron injecting and transporting layer formed on the light emitting layer, and a cathode formed on the electron injecting and transporting layer. Ip2≧Ip3 is established when an ionization potential of a constituent material for the light emitting layer is Ip2 and an ionization potential of a constituent material for the electron injecting and transporting layer is Ip3. Ea1≧Ea2 is established when an electron affinity of a constituent material for the hole injecting and transporting layer is Ea1 and an electron affinity of the constituent material for the light emitting layer is Ea2.
Public/Granted literature
- US20100096622A1 ORGANIC ELECTROLUMINESCENCE ELEMENT Public/Granted day:2010-04-22
Information query
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