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

被引：83
|
作者：
Yang, W [1 ]
Hou, Q [1 ]
Liu, CZ [1 ]
Niu, YH [1 ]
Huang, J [1 ]
Yang, RQ [1 ]
Cao, Y [1 ]
机构：
[1] S China Univ Technol, Inst Polymer Optoelect Mat & Devices, Guangzhou 510640, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY | 2003年 / 13卷 / 06期
关键词：
D O I：
10.1039/b300202k
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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.
引用
收藏
页码：1351 / 1355
页数：5
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