Improved All‐Polymer Solar Cell Performance by Using Matched Polymer Acceptor
Improved All‐Polymer Solar Cell Performance by Using Matched Polymer Acceptor
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DOI：
10.1002/adfm.201601037
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发表时间：
2016-08
影响因子：
19
通讯作者：
S. Shi;Jianyu Yuan;Guanqun Ding;M. Ford;Kunyuan Lu;Guozheng Shi;Jianxia Sun;X. Ling;Yong Li
中科院分区：
文献类型：
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作者：
S. Shi;Jianyu Yuan;Guanqun Ding;M. Ford;Kunyuan Lu;Guozheng Shi;Jianxia Sun;X. Ling;Yong Li
通过引入不同的结构单元和侧链，成功制备了一系列含有萘二酰亚胺的供体-受体型聚合物受体。理论和实验结果表明，分子设计有效地调节了受体聚合物的能级、溶解度和共面性。分子间堆积被认为是体异质结形态的关键因素，可以通过改变共面性来调整。由于形态的改善和能量水平的微调，优化后的器件的功率转换效率达到了 6.0%，这是已报道的全聚合物太阳能电池中效率最高的之一。器件性能的改进可能归因于给体/受体聚合物的相似结晶度，这可以导致平衡电荷转移和传输的最佳相分离形态。
By the introduction of different building blocks and side‐chains, a series of donor–acceptor type polymer acceptors containing naphthalene diimide have been successfully prepared. The theoretical and experimental results show that the molecular design effectively tunes the energy levels, solubility, and coplanarity of the acceptor polymers. The intermolecular packing, which has been considered as a key factor in the bulk heterojunction morphology, has been adjusted by changing the coplanarity. As a result of improved morphology and fine‐tuned energy levels, a power conversion efficiency of 6.0% has been demonstrated for the optimized devices, which is among the highest‐efficiencies for reported all‐polymer solar cells. The improved device performance may be attributed to the resemble crystallinity of the donor/acceptor polymers, which can lead to the optimal phase separation morphology balancing both charge transfer and transport.