Title:
カルバゾール誘導体及び有機EL素子への応用
Document Type and Number:
Japanese Patent JP4903375
Kind Code:
B2
Abstract:
The present invention relates to a series of carbazole derivatives which are used in organic electroluminescent devices as the phosphorescent host materials of the emissive layers. The carbazole derivatives have glass transition temperature of between 70° C. and 220° C. and triplet energy of 2.62 eV or more. The carbazole derivatives comprise two carbazole groups and alkyl group and/or spiro group inserted between the carbazole group and aromatic group, which is represented by formula 1. The carbazole derivatives according to the present invention are used as host materials for the triplet emissive dyes and they have high energy and stability. They can also reduce the converse energy transfer from the dye molecules to the host molecules and improve the luminance and efficiency of the OLEDs, especially the efficiency and lifetime of the blue triplet OLEDs.
Inventors:
Yu Yu
Takashi silk
Kenka Wang
Royal Bar
Step brick
Thunder steel
Takashi silk
Kenka Wang
Royal Bar
Step brick
Thunder steel
Application Number:
JP2004258365A
Publication Date:
March 28, 2012
Filing Date:
September 06, 2004
Export Citation:
Assignee:
Tsinghwa University
Beijing Weihai Technology Co., Ltd.
Beijing Weihai Technology Co., Ltd.
International Classes:
C07D209/86; H01L51/50; C07D209/82; C07D209/88; C09K11/06; H01J1/62; H01J63/04; H01L51/00; H05B33/14
Domestic Patent References:
| JP7053681A | ||||
| JP11040359A | ||||
| JP11008068A | ||||
| JP1234855A | ||||
| JP5045906A | ||||
| JP3078754A | ||||
| JP8292586A | ||||
| JP2002008866A | ||||
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| JP2004352655A | ||||
| JP2003335754A | ||||
| JP2002008860A | ||||
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Foreign References:
| WO2002020694A1 | ||||
| WO1999013691A1 |
Other References:
XIA,C. et al.,Surface Grafting of Conjugated Polymers onto Self-assembled Monolayer Modified Conducting Substrates by Electrochemistry,Chemistry of Materials,2001年,Vol.13, No.5,p.1682-1691
Attorney, Agent or Firm:
Yoshihiro Kodama
Zentaro Hasebe
Zentaro Hasebe