以噻吩齐聚物为推电子单元的DA型共聚物的合成及性能  

Synthesis and characterization of DA copolymer with 3-hexylthiophene oligomer as the electron donor unit

作　　者：米衡[1] 陈彬彬[1] 浦怡[1] 李坚[1] 

机构地区：[1]江苏省太阳能电池与技术重点实验室,常州大学材料科学与工程学院,常州213164

出　　处：《化工新型材料》2014年第2期145-148,共4页New Chemical Materials

摘　　要：采用Suzuki偶合法合成了以聚合度为7的3-已基噻吩齐聚物为推电子单元、苯并噻二唑为拉电子单元的D-π-A型共轭聚合物(PF80.5-3HT7x-BT0.5-x)。通过核磁共振氢谱、紫外可见光吸收光谱、循环伏安法等对共聚物的结构与性能进行了研究与表征,并对共聚物的光电性能进行了探讨。结果表明:共聚物PF80.5-3HT70.1-BT0.4的最大紫外吸收峰相比聚合物PF80.5-3HT70.1-BT0.4的发生了红移;并且降低了共聚物的能带隙及HOMO,LUMO能级。实验表明共聚物PF80.5-3HT70.1-BT0.4显示出更强的光电性能,器件的结构ITO/PEDOT:PSS(70nm)/Copolymer(70nm)/Al(100nm)。Suzuki coupling was used to synthesize copolymers,with the hepta（3-hexylthiophene）（3HT7）as the elec-tron-rich units and 2,1,3-benzothiadiazole（BT）as the electron-deficient unit. The copolymers with different ratio of hepta （3-hexylthiophene） to 2,1,3-benzothiadiazole were PFS0. 5-3 HT70. 4-BT0. 1 and PFS0. 5-3 HT70.1-BT0. 4. Results showed that the UV-vis absorption peak of PF80. 5-3HT70.1-BT0. 4 was red shifted compared with that of PF80. 5-3HT70. 4-BT0. 1, indica-ting PFS0. 5-3HT70.1-BT0.4 had a longer conjugated length. The HOMO/LUMO energy levels and band gap of PFS0.5-3HT70.1-BT0. 4copolymer were lower than those of PF80.5-3HT70.4-BT0.1, The photovohaic properties of the copolymers and the device configuration of ITO/PEDOT： PSS （70nm）/eopolymer （70nm）/A1 （100nm） were preliminarily studied. The photovohage and photocurrent of PFS0.5-3 HTT0.1-BT0. 4 device were both larger than those of PFS0. 5-3HT70. 4-BT0. 1, indica-ting that they had potential applications in polymer solar cells.

关 键 词：Suzuki偶合 噻吩齐聚物 D-π-A型共聚物 

分 类 号：O633.5[理学—高分子化学]