Benzo[1,2-b:4,5-b′]dithiophene and Thieno[3,4-c]pyrrole-4,6-dione Based Donor-π-Acceptor Conjugated Polymers for High Performance Solar Cells by Rational Structure Modulation
Benzo[1,2-b:4,5-b′]dithiophene and Thieno[3,4-c]pyrrole-4,6-dione Based Donor-π-Acceptor Conjugated Polymers for High Performance Solar Cells by Rational Structure Modulation
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DOI：
10.1021/acs.macromol.5b00251
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发表时间：
2015-04
期刊：
影响因子：
5.5
通讯作者：
Shu Liu;X. Bao;Wei Li-;Kailong Wu;Guohua Xie;Renqiang Yang;Chuluo Yang
中科院分区：
文献类型：
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作者：
Shu Liu;X. Bao;Wei Li-;Kailong Wu;Guohua Xie;Renqiang Yang;Chuluo Yang
设计合成了一系列具有D-π-A结构的苯并[1，2-b：4，5-b‘]二硫吩基和硫代[3，4-c]吡咯-4，6-二酮(BDT-TPD)共聚物(P1-P4)。当π桥由2，2‘-联噻吩型转变为硫代[3，2-b]型，再转变为3-己基硫型并[3，2-b]型时，聚合物光伏器件的性能有了显著的改善。特别是基于烷基硫基取代的BDT和3-己基硫代并[3，2-b]噻吩基π桥的P4电池的功率转换效率高达7.71%，电池短路电流高达13.70 mA cm-2。结果表明，π桥的调制是实现高效聚合物太阳电池的一种可行的方法。
A series of benzo[1,2-b:4,5-b′]dithiophene and thieno[3,4-c]pyrrole-4,6-dione (BDT-TPD) based copolymers (P1–P4) with D-π-A structures are designed and synthesized. When the π bridges change from 2,2′-bithiophene to thieno[3,2-b]thiophene and then to 3-hexylthieno[3,2-b]thiophene, the performance of the polymer photovoltaic devices shows significant improvement. Especially, the device based on P4 with alkylthienyl-substituted BDT and π bridge of 3-hexylthieno[3,2-b]thiophene exhibits power conversion efficiency as high as 7.71%, and the short-circuit current of the cells is up to 13.70 mA cm–2. The results indicate that the modulation of π bridges is a feasible way to achieve highly efficient polymer solar cells.