Invention Grant
US07768195B2 Organic electroluminescent device with improved luminous efficiency
有权
具有改善发光效率的有机电致发光器件
- Patent Title: Organic electroluminescent device with improved luminous efficiency
- Patent Title (中): 具有改善发光效率的有机电致发光器件
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Application No.: US11475081Application Date: 2006-06-27
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Publication No.: US07768195B2Publication Date: 2010-08-03
- Inventor: Yukitoshi Jinde , Hitoshi Kuma
- Applicant: Yukitoshi Jinde , Hitoshi Kuma
- 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: JP2006-145983 20060525
- Main IPC: H01J1/62
- IPC: H01J1/62

Abstract:
An organic electroluminescent device (20) including an anode (1), a first emitting layer (3), a carrier barrier layer (4), a second emitting layer (5), and a cathode (7) stacked in that order. The first emitting layer (3) is formed of a hole transporting material, and the second emitting layer (5) is formed of an electron transporting material. The affinity level of the carrier barrier layer (4) is smaller than the affinity level of the second emitting layer (5) in an amount of 0.2 eV or more, and the ionization potential (Ie1) of the carrier barrier layer (4) and the ionization potential (Ih1) of the first emitting layer (3) satisfy Ie1
Public/Granted literature
- US20070273270A1 Organic electroluminescence device Public/Granted day:2007-11-29
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