Methylammonium-Mediated Evolution of Mixed-Organic-CationPerovskite Thin Films: A Dynamic Composition-Tuning Process

Citation:

Chongwen Li, Yuanyuan Zhou, Yue Chang Li Wang, Yingxia Zong, lioz etgar, Guanglei Cui, Nitin P. Padture, and Shuping Pang. 5/19/2017. “Methylammonium-Mediated Evolution of Mixed-Organic-CationPerovskite Thin Films: A Dynamic Composition-Tuning Process.” Angew. Chem. Int. Ed., 2017,56: 7674 –7678.

Abstract:

Methylammonium-mediated phase-evolution
behavior of FA1@xMAxPbI3 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 solutiongrowth
of MOCP thin films with targeted compositions.

Last updated on 10/31/2017