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Oriented Grains with Preferred Low‐Angle Grain Boundaries in Halide Perovskite Films by Pressure‐Induced Crystallization
Author(s) -
Kim Wanjung,
Jung Myung Sun,
Lee Seonhee,
Choi Yung Ji,
Kim Jung Kyu,
Chai Sung Uk,
Kim Wook,
Choi DaeGeun,
Ahn Hyungju,
Cho Jeong Ho,
Choi Dukhyun,
Shin Hyunjung,
Kim Dongho,
Park Jong Hyeok
Publication year - 2018
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201702369
Subject(s) - materials science , crystallization , halide , grain boundary , perovskite (structure) , chemical engineering , grain size , composite material , inorganic chemistry , microstructure , chemistry , engineering
A general methodology is reported to create organic–inorganic hybrid metal halide perovskite films with enlarged and preferred‐orientation grains. Simply pressing polyurethane stamps with hexagonal nanodot arrays on partially dried perovskite intermediate films can cause pressure‐induced perovskite crystallization. This pressure‐induced crystallization allows to prepare highly efficient perovskite solar cells (PSCs) because the preferred‐orientation and enlarged grains with low‐angle grain boundaries in the perovskite films exhibit suppressed nonradiative recombination. Consequently, the photovoltaic response is dramatically improved by the uniaxial compression in both inverted‐planar PSCs and normal PSCs, leading to power conversion efficiencies of 19.16%.