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Sn‐Pb Binary Perovskite Films with High Crystalline Quality for High Performance Solar Cells
Author(s) -
Guo Xuankun,
Chen Jiehuan,
Lian Xiaomei,
Wang Yaqin,
Wu Gang,
Chen Hongzheng
Publication year - 2019
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201900219
Subject(s) - perovskite (structure) , recrystallization (geology) , crystallinity , chemistry , energy conversion efficiency , tin , chemical engineering , binary number , optoelectronics , nanotechnology , materials science , crystallography , organic chemistry , paleontology , arithmetic , mathematics , engineering , biology
Summary of main observation and conclusion As an environmentally friendly perovskite material with low bandgap, Tin (Sn)‐based perovskite has drawn much attention. A simple and effective method for fabricating high‐quality Sn‐Pb binary perovskite film is highly desired. Here, with methylammonium chloride (MACl) post‐treatment to assist vertical recrystallization, we fabricated high quality FA 0.75 Cs 0.25 Pb 0.5 Sn 0.5 I 3 perovskite film via one‐step processing method. This recrystallization method was first used in Sn‐based perovskite. The obtained film consists of vertically aligned grains with high crystallinity, which contributes to a power conversion efficiency (PCE) of 14.03% in corresponding perovskite solar cell (PVSC). The cells maintained 80% of their initial PCEs after being stored for 30 d in glove‐box. This simple, effective method provides an easy way to fabricate high performance Sn‐Pb binary PVSC.