Invention Grant
- Patent Title: Organic electroluminescent element
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Application No.: US14432696Application Date: 2013-09-24
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Publication No.: US09614170B2Publication Date: 2017-04-04
- Inventor: Toshinari Ogiwara , Yukitoshi Jinde
- Applicant: Idemitsu Kosan Co., Ltd.
- Applicant Address: JP Tokyo
- Assignee: IDEMITSU KOSAN CO., LTD.
- Current Assignee: IDEMITSU KOSAN CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2012-221625 20121003
- International Application: PCT/JP2013/075650 WO 20130924
- International Announcement: WO2014/054452 WO 20140410
- Main IPC: H01L51/50
- IPC: H01L51/50 ; H01L51/00

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 at least including a first emitting layer and a second emitting layer. The first emitting layer contains a first host material and a fluorescent first luminescent material. The second emitting layer contains a second luminescent material that is different from the first luminescent material. A difference ΔST(H1) between singlet energy EgS(H1) of the first host material and an energy gap Eg77K(H1) at 77[K] of the first host material satisfies a specific relationship. One of the first luminescent material and the second luminescent material has a main peak wavelength from 400 nm to less than 500 nm and the other of the first luminescent material and the second luminescent material has a main peak wavelength from 500 nm to 700 nm.
Public/Granted literature
- US20150280158A1 ORGANIC ELECTROLUMINESCENT ELEMENT Public/Granted day:2015-10-01
Information query
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