Invention Grant
- Patent Title: Composite material, and light emitting element and light emitting device using the composite material
- Patent Title (中): 复合材料,以及使用复合材料的发光元件和发光装置
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Application No.: US12575488Application Date: 2009-10-08
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Publication No.: US08405070B2Publication Date: 2013-03-26
- Inventor: Yuji Iwaki , Satoshi Seo , Daisuke Kumaki , Harue Nakashima , Kumi Kojima
- Applicant: Yuji Iwaki , Satoshi Seo , Daisuke Kumaki , Harue Nakashima , Kumi Kojima
- Applicant Address: JP Atsugi-shi, Kanagawa-ken
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP Atsugi-shi, Kanagawa-ken
- Agency: Robinson Intellectual Property Law Office, P.C.
- Agent Eric J. Robinson
- Priority: JP2005-085035 20050323; JP2005-130619 20050427; JP2005-144252 20050517; JP2005-185018 20050624
- Main IPC: H01L35/24
- IPC: H01L35/24

Abstract:
An object is to provide a light emitting element with low drive voltage which contains an organic compound and an inorganic compound. One feature of a light emitting element of the present invention is to include a layer containing a light emitting material between a pair of electrodes, in which the layer containing a light emitting material has a layer containing a carbazole derivative represented by General Formula (1) and an inorganic compound which exhibits an electron accepting property to the carbazole derivative represented by General Formula (1). With such a structure, the inorganic compound accepts electrons from the carbazole derivative, carriers are generated internally, and a drive voltage of the light emitting element can be reduced.
Public/Granted literature
- US20100084645A1 COMPOSITE MATERIAL, AND LIGHT EMITTING ELEMENT AND LIGHT EMITTING DEVICE USING THE COMPOSITE MATERIAL Public/Granted day:2010-04-08
Information query
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