Issue 6, 2003
From the journal:

Journal of Materials Chemistry

Improvement of color purity in blue-emitting polyfluorene by copolymerization with dibenzothiophene

Wei Yang,a   Qiong Hou,a   Chuanzhen Liu,a   Yuhua Niu,a   Jian Huang,a   Renqiang Yanga  and  Yong Cao*a  

* Corresponding authors

a Institute of Polymer Optoelectrionic Materials and Devices, South China University of Technology, Guangzhou, China
E-mail: poycao@scut.edu.cn
Fax: 86-020-87114535
Tel: 86-020-87114609

Abstract

High molecular weight, readily soluble copolymers of 9,9-dioctylfluorene and dibenzothiophene (DBTh) comonomer (less than or equal to 50 mol%) are synthesized by Suzuki polycondensation. PL efficiencies and EL external quantum efficiencies of random copolymers decrease with increasing DBTh content. For the alternating copolymer, a PL efficiency of 62% and an EL external quantum efficiency of 0.42% are obtained. Excimer emission is effectively depressed when the DBTh content is greater than 20 mol%. It is indicated that the meta-linkages of 2,8-substitution of DBTh are effective in enhancing blue emission of polyfluorene.

Graphical abstract: Improvement of color purity in blue-emitting polyfluorene by copolymerization with dibenzothiophene

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Article information

DOI
https://doi.org/10.1039/B300202K
Article type
Paper
Submitted
07 Jan 2003
Accepted
31 Mar 2003
First published
17 Apr 2003

J. Mater. Chem., 2003,13, 1351-1355

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Improvement of color purity in blue-emitting polyfluorene by copolymerization with dibenzothiophene

W. Yang, Q. Hou, C. Liu, Y. Niu, J. Huang, R. Yang and Y. Cao, J. Mater. Chem., 2003, 13, 1351 DOI: 10.1039/B300202K

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