Donor–Acceptor Random versus Alternating Copolymers for Efficient Polymer Solar Cells: Importance of Optimal Composition in Random Copolymers
Donor–Acceptor Random versus Alternating Copolymers for Efficient Polymer Solar Cells: Importance of Optimal Composition in Random Copolymers
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DOI：
10.1021/acs.macromol.5b02772
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发表时间：
2016-03
期刊：
影响因子：
5.5
通讯作者：
T. Kang;Joonhyeong Choi;Han-Hee Cho;S. Yoon;Bumjoon J. Kim
中科院分区：
文献类型：
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作者：
T. Kang;Joonhyeong Choi;Han-Hee Cho;S. Yoon;Bumjoon J. Kim
共轭共聚物的主链组成对于确定共轭结构和分子间组装以及操纵其光学、电化学和电子性能非常重要。然而，对于控制供体-受体（D-A）型低带隙聚合物的主链组成的关注有限。在此，我们开发了一系列D-A无规共聚物（P(BDTT-r-DPP)），由富电子（D）噻吩基取代的苯并[1,2-b:4,5-b']二噻吩（BDTT）和缺电子（A）吡咯并[3,4-c]吡咯-1,4-二酮（DPP）的不同组成组成。 D-A无规共聚物的光学和电学性质可以通过调节聚合物主链中BDTT与DPP的比例（4:1、2:1、1:1、1:2和1:4）来控制； BDTT 的增加导致 400-600 nm 范围内的吸收增加和较低的最高占据分子轨道能级，而较高比例的 DPP 导致 700-900 nm 范围内更强的吸收。这...
The backbone composition of conjugated copolymers is of great importance in determining the conjugated structure and intermolecular assembly and in manipulating their optical, electrochemical, and electronic properties. However, limited attention has been directed at controlling the backbone composition of donor–acceptor (D–A) type low bandgap polymers. Herein, we developed a series of D–A random copolymers (P(BDTT-r-DPP)) composed of different compositions of electron-rich (D) thienyl-substituted benzo[1,2-b:4,5-b′]dithiophene (BDTT) and electron-deficient (A) pyrrolo[3,4-c]pyrrole-1,4-dione (DPP). The optical and electrical properties of D–A random copolymers could be controlled by tuning the ratios of BDTT to DPP (4:1, 2:1, 1:1, 1:2, and 1:4) in the polymer backbone; an increase in BDTT resulted in increased absorption in the range of 400–600 nm and a lower-lying highest occupied molecular orbital energy level, while a higher proportion of DPP induced stronger absorption in the range of 700–900 nm. The...