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Methylammonium‐Mediated Evolution of Mixed‐Organic‐Cation Perovskite Thin Films: A Dynamic Composition‐Tuning Process
Author(s) -
Li Chongwen,
Zhou Yuanyuan,
Wang Li,
Chang Yue,
Zong Yingxia,
Etgar Lioz,
Cui Guanglei,
Padture Nitin P.,
Pang Shuping
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201704188
Subject(s) - perovskite (structure) , composition (language) , phase (matter) , thin film , materials science , grain size , process (computing) , chemical engineering , chemistry , nanotechnology , computer science , crystallography , organic chemistry , metallurgy , operating system , philosophy , linguistics , engineering
Abstract Methylammonium‐mediated phase‐evolution behavior of FA 1−x MA x PbI 3 mixed‐organic‐cation perovskite (MOCP) is studied. It is found that by simply enriching the MOCP precursor solutions with excess methylammonium cations, the MOCPs form via a dynamic composition‐tuning process that is key to obtaining MOCP thin films with superior properties. This simple chemical approach addresses several key challenges, such as control over phase purity, uniformity, grain size, composition, etc., associated with the solution‐growth of MOCP thin films with targeted compositions.