Invention Grant
- Patent Title: Light emitting element and display device using the same
- Patent Title (中): 发光元件及使用其的显示装置
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Application No.: US12510057Application Date: 2009-07-27
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Publication No.: US08169139B2Publication Date: 2012-05-01
- Inventor: Hisao Ikeda , Junichiro Sakata , Daisuke Kumaki , Satoshi Seo
- Applicant: Hisao Ikeda , Junichiro Sakata , Daisuke Kumaki , Satoshi Seo
- Applicant Address: JP
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP
- Agency: Husch Blackwell LLP
- Priority: JP2004-288408 20040930
- Main IPC: H01J1/62
- IPC: H01J1/62 ; H01J63/04

Abstract:
An object of the invention is to provide a highly reliable light emitting element with low drive voltage and longer life than a conventional light emitting element, and a display device using the light emitting element. A light emitting element according to the invention comprises a plurality of layers which is interposed between a pair of electrodes, in which at least one of the plurality of layers is formed of a layer containing a light emitting material, and the layer containing a light emitting material is interposed between a layer containing an oxide semiconductor and/or metal oxide and a material having a higher hole transporting property than an electron transporting property, and a layer containing an oxide semiconductor and/or metal oxide, a material having a higher electron transporting property than a hole transporting property and a material which can donate electrons to the material having a higher electron transporting property than a hole transporting property.
Public/Granted literature
- US20090289252A1 Light Emitting Element and Display Device Using The Same Public/Granted day:2009-11-26
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