题目：

Controllable Perovskite Crystallization by Water Additive for High-Performance Solar Cells

作者：

Xiu Gong , Meng Li , Xiao-Bo Shi , Heng Ma , Zhao-Kui Wang , ^* and Liang-Sheng Liao ^*

单位：

Jiangsu Key Laboratory for Carbon-based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, P. R. China

College of Physics and Electronic Engineering Henan Normal University, Xinxiang 453007, P. R. China

摘要：

A key issue for perovskite solar cells is the stability of perovskite materials due to moisture effects under ambient conditions, although their efficiency is improved constantly. Herein, an improved CH₃NH₃ PbI_3−xCl_x perovskite quality is demonstrated with good crystallization and stability by using water as an additive during crystal perovskite growth. Incorporating suitable water additives in N,N -dimethylformamide (DMF) leads to controllable growth of  perovskites due to the lower boiling point and the higher vapor pressure of water compared with DMF. In addition, CH₃NH₃ PbI_3−xCl_x ・ nH₂O hydrated perovskites, which can be resistant to the corrosion by water molecules to some extent, are assumed to be generated during the annealing process. Accordingly, water additive based perovskite solar cells present a high power conversion efficiency of 16.06% and improved cell stability under ambient conditions compared with the references. The findings in this work provide a route to control the growth of crystal perovskites and a clue to improve the stability of organic�inorganic halide perovskites.

影响因子：

11.805

分区情况：

1区

链接：

http://onlinelibrary.wiley.com/doi/10.1002/adfm.201503559/abstract