Premium
A Purified, Solvent‐Intercalated Precursor Complex for Wide‐Process‐Window Fabrication of Efficient Perovskite Solar Cells and Modules
Author(s) -
Ozaki Masashi,
Shimazaki Ai,
Jung Mina,
Nakaike Yumi,
Maruyama Naoki,
Yakumaru Shinya,
Rafieh Alwani Imanah,
Sasamori Takahiro,
Tokitoh Norihiro,
Ekanayake Piyasiri,
Murata Yasujiro,
Murdey Richard,
Wakamiya Atsushi
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201902235
Subject(s) - perovskite solar cell , fabrication , materials science , solvent , iodide , energy conversion efficiency , perovskite (structure) , solar cell , dimethylformamide , solution process , annealing (glass) , chemical engineering , inorganic chemistry , optoelectronics , chemistry , organic chemistry , composite material , medicine , alternative medicine , pathology , engineering
A high‐purity methylammonium lead iodide complex with intercalated dimethylformamide (DMF) molecules, CH 3 NH 3 PbI 3 ⋅DMF, is introduced as an effective precursor material for fabricating high‐quality solution‐processed perovskite layers. Spin‐coated films of the solvent‐intercalated complex dissolved in pure dimethyl sulfoxide (DMSO) yielded thick, dense perovskite layers after thermal annealing. The low volatility of the pure DMSO solvent extended the allowable time for low‐speed spin programs and considerably relaxed the precision needed for the antisolvent addition step. An optimized, reliable fabrication method was devised to take advantage of this extended process window and resulted in highly consistent performance of perovskite solar cell devices, with up to 19.8 % power‐conversion efficiency (PCE). The optimized method was also used to fabricate a 22.0 cm 2 , eight‐cell module with 14.2 % PCE (active area) and 8.64 V output (1.08 V/cell).