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Chlorobenzene: A Processing Solvent Enabling the Fabrication of Perovskite Solar Cells with Consecutive Double‐Perovskite and Perovskite/Organic Semiconductor Bulk Heterojunction Layers
Author(s) -
Wang Jiandong,
Yao Xiang,
Xiao WenJing,
Bai Yang,
Xu ZiWen,
Lin Jian,
Li WeiShi
Publication year - 2019
Publication title -
solar rrl
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.201800325
Subject(s) - chlorobenzene , perovskite (structure) , materials science , heterojunction , fabrication , perovskite solar cell , solvent , butylamine , chemical engineering , energy conversion efficiency , bromide , layer (electronics) , inorganic chemistry , chemistry , amine gas treating , nanotechnology , organic chemistry , optoelectronics , catalysis , medicine , alternative medicine , pathology , engineering
Chlorobenzene (CB), which has been used as an anti‐solvent, is demonstrated here as a processing solvent for the fabrication of perovskite films and solar cells. This approach results from the unexpected finding that butylamine‐bound organolead iodides can be dissolved in CB to form precursor solutions. Together with previously established perovskite composition transformation methods, not only conventionally structured perovskite solar cells (PSCs) with a (CH 3 NH 3 )PbI 3 active layer but also nonconventionally structured devices with a consecutive (CH 3 NH 3 )PbI 3 /(C 4 H 9 NH 3 ) 2 PbI 4 double layer or a mixed poly(triaryl amine) (PTAA) and (CH 3 NH 3 )PbI 3 bulk heterojunction layer are successfully prepared and demonstrated with an optimal efficiency of 16.44%. This is the first time that nonpolar solvents are used for perovskite material processing, which can remove the solvent limitation and open a new avenue for designing and preparing perovskite devices with desired structures.