Benzo[1,2-<i>b</i>:4,5-<i>b</i>′]dithiophene and Thieno[3,4-<i>c</i>]pyrrole-4,6-dione Based Donor-π-Acceptor Conjugated Polymers for High Performance Solar Cells by Rational Structure Modulation
作者:Shu Liu、Xichang Bao、Wei Li、Kailong Wu、Guohua Xie、Renqiang Yang、Chuluo Yang
DOI:10.1021/acs.macromol.5b00251
日期:2015.5.12
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
一系列苯并[1,2- b:4,5- b ']二噻吩和噻吩并[3,4- c ]吡咯-4,6-二酮(BDT-TPD)基共聚物(P1 - P4)与D-设计并合成了π-A结构。当π桥从2,2'-联噻吩变为噻吩并[3,2- b ]噻吩然后变为3-己基噻吩并[3,2 - b ]噻吩时,聚合物光电器件的性能显示出显着的改善。特别地,基于具有烷基噻吩基取代的BDT和3-己基噻吩并[3,2- b ]噻吩的π桥的P4的器件表现出高达7.71%的功率转换效率,并且电池的短路电流高达13.70毫安厘米–2。结果表明,π桥的调制是获得高效聚合物太阳能电池的一种可行方法。