Invention Grant
- Patent Title: Organic electroluminescence element
- Patent Title (中): 有机电致发光元件
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Application No.: US10535310Application Date: 2003-11-13
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Publication No.: US07663304B2Publication Date: 2010-02-16
- Inventor: Kenichi Fukuoka , Masahide Matsuura , Hiroshi Yamamoto , Chishio Hosokawa
- Applicant: Kenichi Fukuoka , Masahide Matsuura , Hiroshi Yamamoto , Chishio Hosokawa
- Applicant Address: JP Tokyo
- Assignee: Idemitsu Kosan Co., Ltd.
- Current Assignee: Idemitsu Kosan Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Steptoe & Johnson LLP
- Priority: JP2002-333812 20021118; JP2003-152276 20030529
- International Application: PCT/JP03/14425 WO 20031113
- International Announcement: WO2004/047499 WO 20040603
- Main IPC: H01L51/54
- IPC: H01L51/54

Abstract:
An organic electroluminescence element comprising: an anode; a first emitting layer comprising at least a first host material and a first dopant; a second emitting layer comprising at least a second host material and a second dopant; and a cathode in the order mentioned: wherein the energy gap Egh1 of the first host material, the energy gap Egd1 of the first dopant, the energy gap Egh2 of the second host material, and the energy gap Egd2 of the second dopant satisfy the following formulas; and the luminescent intensity I1 at the maximum luminescent wavelength of an emission spectrum derived from the first emitting layer, and the luminescent intensity I2 at the maximum luminescent wavelength of an emission spectrum derived from the second emitting layer satisfy the following formula: Egh1>Egd1 Egh2>Egd2 Egd1>Egd2 I1>3.5×I2.
Public/Granted literature
- US20060043859A1 Organic electroluminescence element Public/Granted day:2006-03-02
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