Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, P. R. China.
Suzhou Institute of Nano-Tech and Nano-Bionics, CAS, Suzhou, 215123, P. R. China.
Adv Mater. 2018 Mar;30(11). doi: 10.1002/adma.201705786. Epub 2018 Jan 29.
A bifunctional conjugated organic molecule 4-(aminomethyl) benzoic acid hydroiodide (AB) is designed and employed as an organic cation in organic-inorganic halide perovskite materials. Compared with the monofunctional cation benzylamine hydroiodide (BA) and the nonconjugated bifunctional organic molecule 5-ammonium valeric acid, devices based on AB-MAPbI show a good stability and a superior power conversion efficiency of 15.6% with a short-circuit current of 23.4 mA cm , an open-circuit voltage of 0.94 V, and a fill factor of 0.71. The bifunctional conjugated cation not only benefits the growth of perovskite crystals in the mesoporous network, but also facilitates the charge transport. This investigation helps explore new approaches to rational design of novel organic cations for perovskite materials.
一种双官能共轭有机分子 4-（氨甲基）苯甲酸氢碘酸盐（AB）被设计并用作有机-无机卤化物钙钛矿材料中的有机阳离子。与单官能阳离子苄胺氢碘酸盐（BA）和非共轭双官能有机分子 5-氨戊酸相比，基于 AB-MAPbI 的器件表现出良好的稳定性和较高的功率转换效率为 15.6%，短路电流为 23.4 mA cm-2，开路电压为 0.94 V，填充因子为 0.71。双官能共轭阳离子不仅有利于钙钛矿晶体在介孔网络中的生长，而且有利于电荷输运。这项研究有助于探索合理设计新型有机阳离子用于钙钛矿材料的新方法。
