标题：Dissolution and recrystallization of perovskite induced by N-methyl-2-pyrrolidone in a closed steam annealing method
作者：Zhi, Lili; Li, Yanqing; Cao, Xiaobing; Li, Yahui; Cui, Xian; Ci, Lijie; Wei, Jinquan
作者机构：[Zhi, Lili; Ci, Lijie] Shandong Univ, Sch Mat Sci & Engn, Minist Educ, SDU & Rice Joint Ctr Carbon Nanomat,Key Lab Liqui, Jinan 250061, Shandong, Peop 更多
通讯作者：Ci, Lijie;Ci, LJ;Wei, JQ
通讯作者地址：[Ci, LJ]Shandong Univ, Sch Mat Sci & Engn, Minist Educ, SDU & Rice Joint Ctr Carbon Nanomat,Key Lab Liqui, Jinan 250061, Shandong, Peoples R China;[We 更多
来源：JOURNAL OF ENERGY CHEMISTRY
关键词：Perovskite solar cell; N-Methyl-2-pyrrolidone (NMP); Dissolution and; recrystallization; Closed-steam annealing; Oswald ripening
摘要：High quality perovskite films with large columnar grains are greatly desired for efficient perovskite solar cells. Here, low volatility N-methyl-2-pyrrolidone (NMP) was added in MAI/IPA solution in a two-step spin-coating method, which promoted the conversion of lead iodide to perovskite. The perovskite films were annealed by a closed-steam annealing method to prolong the recrystallization process of perovskite films assisted by the residual NMP. It leaded to high quality CH3NH3PbI3 perovskite films with large columnar grains due to its enhancement of the Oswald ripening. The large grain perovskite film leaded to efficient carrier transformation and injection, and low recombination. The photovoltaic performance of the perovskite solar cells was improved significantly. (C) 2018 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.