Ge Qian-Qing, Shao Jiang-Yang, Ding Jie, Deng Li-Ye, Zhou Wen-Ke, Chen Yao-Xuan, Ma Jing-Yuan, Wan Li-Jun, Yao Jiannian, Hu Jin-Song, Zhong Yu-Wu
Beijing National Research Centre for Molecular Sciences, CAS Research/Education Centre for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China.
Angew Chem Int Ed Engl. 2018 Aug 20;57(34):10959-10965. doi: 10.1002/anie.201806392. Epub 2018 Jul 23.
A readily available small molecular hole-transporting material (HTM), OMe-TATPyr, was synthesized and tested in perovskite solar cells (PSCs). OMe-TATPyr is a two-dimensional π-conjugated molecule with a pyrene core and four phenyl-thiophene bridged triarylamine groups. It can be readily synthesized in gram scale with a low lab cost of around US$ 50 g . The incorporation of the phenyl-thiophene units in OMe-TATPyr are beneficial for not only carrier transportation through improved charge delocalization and intermolecular stacking, but also potential trap passivation via Pb-S interaction as supported by depth-profiling XPS, photoluminescence, and electrochemical impedance analysis. As a result, an impressive best power conversion efficiency (PCE) of up to 20.6 % and an average PCE of 20.0 % with good stability has been achieved for mixed-cation PSCs with OMe-TATPyr with an area of 0.09 cm . A device with an area of 1.08 cm based on OMe-TATPyr demonstrates a PCE of 17.3 %.
合成了一种易于获得的小分子空穴传输材料（HTM）OMe-TATPyr，并在钙钛矿太阳能电池（PSC）中进行了测试。OMe-TATPyr是一种二维π共轭分子，具有芘核和四个苯基噻吩桥联的三芳基胺基团。它可以很容易地以克级规模合成，实验室成本低，约为50美元/克。OMe-TATPyr中苯基噻吩单元的引入不仅有利于通过改善电荷离域和分子间堆积来进行载流子传输，而且如深度剖析X射线光电子能谱、光致发光和电化学阻抗分析所支持的，还通过Pb-S相互作用实现潜在的陷阱钝化。结果，对于面积为0.09平方厘米的含OMe-TATPyr的混合阳离子PSC，实现了高达20.6%的令人印象深刻的最佳功率转换效率（PCE）和20.0%的平均PCE，且具有良好的稳定性。基于OMe-TATPyr的面积为1.08平方厘米的器件显示出17.3%的PCE。
