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Highly Efficient, Reproducible, Uniform (CH 3 NH 3 )PbI 3 Layer by Processing Additive Dripping for Solution‐Processed Planar Heterojunction Perovskite Solar Cells
Author(s) -
Kim Hansol,
Jeong Hanbin,
Lee Jae Kwan
Publication year - 2016
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201600722
Subject(s) - materials science , perovskite (structure) , crystallinity , chlorobenzene , heterojunction , energy conversion efficiency , planar , layer (electronics) , optoelectronics , photovoltaic system , homogeneous , chemical engineering , nanotechnology , composite material , computer science , electrical engineering , chemistry , catalysis , organic chemistry , computer graphics (images) , physics , engineering , thermodynamics
A processing additive dripping (PAD) approach to forming highly efficient (CH 3 NH 3 )PbI 3 (MAPbI 3 ) perovskite layers was investigated. A MAPbI 3 (CB/DIO) perovskite film fabricated by this approach, which included briefly dripping chlorobenzene incorporating a small amount of diiodooctane (DIO) during casting of a MAPbI 3 perovskite precursor dissolved in dimethylformamide, exhibited superior smooth, uniform morphologies with high crystallinity and large grains and revealed completely homogeneous surface coverage. The surface coverage and morphology of the substrate significantly affected the photovoltaic performance of planar heterojunction (PHJ) perovskite solar cells (PrSCs), resulting in a power conversion efficiency of 11.45 % with high open‐circuit voltage of 0.91 V and the highest fill factor of 80.87 %. Moreover, the PAD approach could effectively provide efficient MAPbI 3 (CB/DIO) perovskite layers for highly efficient, reproducible, uniform PHJ PrSC devices without performance loss or variation even over larger active areas.