用于受体聚合物的硅氧烷封端侧链工程可使全聚合物太阳能电池的功率转换效率超过7%。
Siloxane-Terminated Side Chain Engineering of Acceptor Polymers Leading to Over 7% Power Conversion Efficiencies in All-Polymer Solar Cells.
作者信息
Feng Shizhen, Liu Chang, Xu Xiaofeng, Liu Xuncheng, Zhang Lianjie, Nian Yaowen, Cao Yong, Chen Junwu
机构信息
Institute of Polymer Optoelectronic Materials & Devices, State Key Laboratory of Luminescent Materials & Devices, South China University of Technology, Guangzhou 510640, P. R. China.
Biomolecular and Organic Electronics, Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, Sweden.
出版信息
ACS Macro Lett. 2017 Nov 21;6(11):1310-1314. doi: 10.1021/acsmacrolett.7b00738. Epub 2017 Nov 9.
To investigate the influence of functional pendent groups on acceptor polymers and photovoltaic properties of all-polymer solar cells (all-PSCs), two novel acceptor polymers containing siloxane-terminated side chains are synthesized and characterized. Increasing the content of siloxane-terminated side chains can reduce π-π stacking distance and improve crystalline behavior, yet lead to poorer solubility of the acceptor polymers. By modulating the proper loadings of siloxane-terminated side chains on the acceptor polymers, the PBDB-T:PNDI-Si25 all-PSC attains a maximal power conversion efficiency (PCE) of 7.4% with an outstanding fill factor of 0.68. The results provide new insights for developing high-performance all-PSCs through functional group engineering on the acceptor polymers, to achieve good solubility, polymer miscibility, and blend morphology.
为了研究功能性侧基对受体聚合物以及全聚合物太阳能电池（all-PSC）光伏性能的影响，合成并表征了两种含有硅氧烷封端侧链的新型受体聚合物。增加硅氧烷封端侧链的含量可以减小π-π堆积距离并改善结晶行为，但会导致受体聚合物的溶解性变差。通过调节受体聚合物上硅氧烷封端侧链的适当负载量，PBDB-T:PNDI-Si25全聚合物太阳能电池实现了7.4%的最大功率转换效率（PCE），填充因子高达0.68。这些结果为通过受体聚合物上的官能团工程开发高性能全聚合物太阳能电池提供了新的见解，以实现良好的溶解性、聚合物相容性和共混形态。
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