Invention Grant
- Patent Title: Carbazole derivative, and light emitting element and light emitting device using the carbazole derivative
- Patent Title (中): 咔唑衍生物,发光元件和使用咔唑衍生物的发光元件
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Application No.: US10583028Application Date: 2005-10-14
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Publication No.: US07901791B2Publication Date: 2011-03-08
- Inventor: Harue Nakashima , Sachiko Kawakami , Daisuke Kumaki
- Applicant: Harue Nakashima , Sachiko Kawakami , Daisuke Kumaki
- 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: JP2004-304225 20041019; JP2004-333344 20041117; JP2005-084533 20050323
- International Application: PCT/JP2005/019349 WO 20051014
- International Announcement: WO2006/043647 WO 20060427
- Main IPC: H01J1/62
- IPC: H01J1/62

Abstract:
It is an object of the present invention to provide a material which is excellent in a hole injecting property and a hole transporting property, and to provide a light emitting element and a light emitting device using a material which is excellent in a hole injecting property and a hole transporting property. The present invention provides a carbazol derivative represented by a general formula (1). The carbazol derivative according to the present invention is excellent in the hole injecting property. By using the carbazol derivative according to the present invention as a hole injecting material for a hole injecting layer of a light emitting element, a driving voltage can be reduced. In addition, a lower driving voltage, improvement of the luminous efficiency, a longer life time, and higher reliability can be realized by applying the material to a light emitting element or a light emitting device.
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