Wei Liu, Yijie Nai, Weikun Chen, Guanhaojie Zhen, Songting Liang, Xueyi Guo, Jun Yuan, Yingping Zou
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引用次数: 0
Abstract
Herein, a new A-DA′D-A structured small molecule acceptor named m-TF9, containing semi-perfluoroalkyl chains, was designed and synthesized for highly efficient organic solar cells (OSCs). Compared with its alkylsubstituted analogous m-TH, m-TF9 exhibits tighter molecular packing and lower surface free energy. When blended with PTQ10, m-TF9 can achieve a high fill factor of 77.3%. By using 1,4-difluorobenzene as an additive, the PTQ10:m-TF9-based OSC delivers a high efficiency of 16.3% with an improved short circuit current (JSC) of 27.0 mA cm−2. In addition, the m-TF9-based OSC demonstrates good storage stability in both air and nitrogen environments. This work highlights the great potential of semi-perfluoroalkyl chains as the modification blocks for A-DA′D-A type acceptors to achieve good charge transport properties and high efficiency.
期刊介绍：
Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.
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