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Additive Enhanced Crystallization of Solution‐Processed Perovskite for Highly Efficient Planar‐Heterojunction Solar Cells
Author(s) -
Liang PoWei,
Liao ChienYi,
Chueh ChuChen,
Zuo Fan,
Williams Spencer T.,
Xin XuKai,
Lin Jiangjen,
Jen Alex K.Y.
Publication year - 2014
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201400231
Subject(s) - crystallization , materials science , perovskite (structure) , nucleation , heterojunction , planar , crystal (programming language) , layer (electronics) , crystal growth , chemical engineering , nanotechnology , computer science , optoelectronics , crystallography , chemistry , computer graphics (images) , organic chemistry , engineering , programming language
An effective method to control the rate of perovskite crystallization by incorporating rationally chosen additives into the perovskite precursor solutions is demonstrated. The processing additives simultaneously facilitate nucleation and modulate the kinetics of crystal growth during crystallization, leading to much smoother perovskite morphology with improved coverage area and crystal uniformity. As a result, it enables very high PCE (∼12%) planar‐heterojunction solar cells to be fabricated through the low‐temperature solution processes (under 150 °C). This study opens up a new direction for optimizing perovskite active layer properties to expand device performance ceilings.