Synthesis and Photovoltaic Properties of the Copolymers Based on Carbazole with Tetrathiophene Porphyrin Side Chains Linked by a Flexible Alkyl-interval  

作　　者：Haibin Xiao Yanghua Deng Jingjun Yuan Ping Gao Bin Zhao Songting Tan 

机构地区：[1]Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education,Xiangtan University [2]College of Chemistry,Xiangtan University,Xiangtan,Hunan 411105,China

出　　处：《Chinese Journal of Chemistry》2018年第7期599-604,共6页中国化学（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China （Nos. 21474081, 51573153） and Hunan 2011 Collaborative Innovation Center of Chemical Engineering ＆ Technology with Environmental Benignity and Effective Resource Utilization.

摘　　要：Four copolymers （XP10, XP11, XP12 and XP13） based on diketopyrrolopyrrole （DPP） and carbazole units with tetrathiophene porphyrin （TTP） side chains linked by a flexible alkyl-interval were designed and synthesized. The effects of the introduction of TTP on the optical and electrochemical properties, the morphology, the mobility and the photovoltaic performance of copolymers were systematically studied. The results revealed that XP11 with a TTP/DPP ratio of 2/8 possessed the best performances, i.e., broad absorption spectra, balanced hole/electron mobility and suitable microphase separation. After optimizing via solution vapor annealing, the organic solar cell devices based on XP11 and PCnBM showed the best power conversion efficiency of 5.11% with a short-circuit current density （Jsc） of 10.36 mA·cm^-2, an open-circuit voltage （Voc） of 0.77 V, and a fill factor （FF） of 0.64.Four copolymers （XP10, XP11, XP12 and XP13） based on diketopyrrolopyrrole （DPP） and carbazole units with tetrathiophene porphyrin （TTP） side chains linked by a flexible alkyl-interval were designed and synthesized. The effects of the introduction of TTP on the optical and electrochemical properties, the morphology, the mobility and the photovoltaic performance of copolymers were systematically studied. The results revealed that XP11 with a TTP/DPP ratio of 2/8 possessed the best performances, i.e., broad absorption spectra, balanced hole/electron mobility and suitable microphase separation. After optimizing via solution vapor annealing, the organic solar cell devices based on XP11 and PCnBM showed the best power conversion efficiency of 5.11% with a short-circuit current density （Jsc） of 10.36 mA·cm^-2, an open-circuit voltage （Voc） of 0.77 V, and a fill factor （FF） of 0.64.

关 键 词：organic solar cells PORPHYRIN alkyl-interval 

分 类 号：O632.13[理学—高分子化学] TG139.7[理学—化学]