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  

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

作　　者：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] 

机构地区：[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

出　　处：《化学学报》2007年第9期847-852,共6页Acta Chimica Sinica

基　　金：国家科技部973项目(No.2002CB613402);国家自然科学基金(No.50433030)资助项目.

摘　　要：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645nm红移至690nm.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635nm红移至680nm.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.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.

关 键 词：咔唑 噻吩衍生物 红光 聚合物发光二极管 

分 类 号：O633.5[理学—高分子化学]