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化学学报
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化学学报 ›› 2007, Vol. 65 ›› Issue (9): 847-852. 上一篇    下一篇

研究论文

新型基于3,6-咔唑与噻吩衍生物的红光聚合物的合成与性能研究

刘然升1, 曾文进1, 杜斌1, 候琼2, 石伟1, 孙明亮1, 杨伟1, 曹镛*,1   

  1. (1华南理工大学高分子光电材料与器件研究所 特种材料重点实验室 广州 510640)
    (2华南师范大学化学与环境学院 广州 510640)
  • 投稿日期:2006-12-11 修回日期:2007-01-22 发布日期:2007-05-14
  • 通讯作者: 曹镛

Synthesis and Characterization of Novel Red-light-emitting Polymers Based on 3,6-Carbazole and Thiophene Derivatives

LIU Ran-Sheng1; ZENG Wen-Jin1; DU Bin1; HOU Qiong2; SHI Wei1; SUN Ming-Liang1; YANG Wei1; CAO Yong*,1   

  1. (1 Institute of Polymer Optoelectronic Materials and Devices, Key Laboratory of Specially Functional Materials, South China University of Technology, Guangzhou 510640)
    (2 School of Chemistry and Environment, South China Normal University, Guangzhou 510640)
  • Received:2006-12-11 Revised:2007-01-22 Published:2007-05-14

PDF

1081

被引次数

7

用Suzuki偶合反应制备了一系列N-(2-乙基己基)-3,6-咔唑(Cz)与4,7-二(4-己基噻吩)-2,1,3-苯并噻二唑(DHTBT)的共聚物, 研究该类聚合物的电化学、光学和电致发光性能. 在薄膜状态下, 即使DHTBT含量为1%的聚合物也发生了从Cz链段到DHTBT单元的有效的能量转移. 光致发光光谱随着DHTBT含量的增加, 从645 nm红移至690 nm. PCzDHTBT1获得了71%的薄膜光致发光效率. 以该类聚合物为发光层的器件的EL光谱也随着DHTBT含量的增加从635 nm红移至680 nm. 由PCzDHTBT15制作的结构为ITO/PEDOT:PSS/polymer/Ba/Al的器件得到了0.61%的外量子效率.

关键词: 咔唑, 噻吩衍生物, 红光, 聚合物发光二极管

A series of conjugated copolymers derived from N-(2-ethylhexyl)-3,6-carbazole (Cz) and 4,7-di(4-hexylthien-2-yl)-2,1,3-benzothiadiazole (DHTBT) were synthesized by Suzuki polycondensation. The electrochemical, optical and electroluminescent properties of these polymers were investigated. Efficient energy transfer from the Cz segment to the DHTBT unit occurred even if the DHTBT content in the copolymers was as low as 1 mol% in solid film. PL emission was red-shifted significantly from 645 to 690 nm with the increase in DHTBT content from 1 to 50 mol%. The highest PL efficiency in solid film was 71% for PCzDHTBT1. EL emission of devices with these polymers as active layer red-shifted from 635 to 680 nm when the DHTBT content increased from 1 mol% to 50 mol%. The highest external quantum efficiency was 0.61% for devices from PCzDHTBT15 with the device configuration of ITO/PEDOT: PSS/polymer/Ba/Al.

Key words: carbazole, thiophene derivative, red electroluminescence, polymer light-emitting diodes (PLEDs)