Premium
Dimethyl Sulfoxide Solvent Engineering for High Quality Cation‐Anion‐Mixed Hybrid and High Efficiency Perovskite Solar Cells
Author(s) -
He X.,
Wu J.,
Wu T.,
Lan Z.,
Huang M.
Publication year - 2019
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201800909
Subject(s) - perovskite (structure) , dimethyl sulfoxide , chlorobenzene , solvent , energy conversion efficiency , materials science , chemical engineering , perovskite solar cell , inorganic chemistry , chemistry , organic chemistry , catalysis , optoelectronics , engineering
High‐quality perovskite thin film is one of the most key factors as to the state‐of the‐art perovskite solar cells (PSCs). Solvent‐engineering has caused widespread concern in the aspects of improving the high‐quality perovskite layers. For the preparation of the cation‐anion‐mixed perovskite Cs 0.05 (MA 0.17 FA 0.83 ) 0.95 Pb(I 0.83 Br 0.17 ) 3 , the influence of the perovskite precursor composition on the quality of perovskite layers is not clear yet. Here, we conduct a systematic study on the solution composition by changing the molar ratio for lead (Pb) to dimethyl sulfoxide (DMSO). Significantly, we obtain a dense, uniform, long charge carrier lifetime perovskite thin film, which facilitates charge transportation and reduces charge recombination in PSCs and thus considerably improves the device performance. Based on solvent engineering of DMSO and replacing toxic solvent chlorobenzene with green solvent ethyl acetate, a high‐quality perovskite layer is prepared and the device based on green solvent process exhibits a power conversion efficiency (PCE) of 19.23 %.