Zhao Xiao-Chong, Wu Dong-Xue, Yang Li-Jun, Tang Jun, Yue Guo-Zong, Yang Pan
Institute of Materials, Chinese Academy of Engineering Physics, Jiangyou 621908, P. R. China.
J Nanosci Nanotechnol. 2020 Feb 1;20(2):1008-1012. doi: 10.1166/jnn.2020.16896.
Institute of Materials, Chinese Academy of Engineering Physics, Jiangyou 621908, P. R. China To improve the stability of organic-inorganic hybrid perovskite, cesium-containing methylammonium lead iodide perovskite have been synthesized by one-step solution deposition. With the increasing of Cs doping concentration, direct optical band gap of perovskite was increases, while defects and roughness of perovskite thin films were gradually augmented. A certain amount of Cs incorporated in perovskite absorb layer could improve power conversion efficiency through the enhancing of open circuit voltage and fill factor. However, excessive Cs doping concentration results in the reduced of short-circuit current and fill factor, which reduced power conversion efficiency. The optimized ratio 10% Cs doping achieved the highest power conversion efficiency (16.84%).
中国工程物理研究院材料研究所，四川江油621908，中华人民共和国 为提高有机-无机杂化钙钛矿的稳定性，通过一步溶液沉积法合成了含铯的甲基铵碘化铅钙钛矿。随着Cs掺杂浓度的增加，钙钛矿的直接光学带隙增大，而钙钛矿薄膜的缺陷和粗糙度逐渐增加。在钙钛矿吸收层中掺入一定量的Cs可通过提高开路电压和填充因子来提高功率转换效率。然而，过高的Cs掺杂浓度会导致短路电流和填充因子降低，从而降低功率转换效率。优化的10%Cs掺杂比例实现了最高的功率转换效率（16.84%）。
