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Lead‐Free Solar Cells based on Tin Halide Perovskite Films with High Coverage and Improved Aggregation
Author(s) -
Liu Jiewei,
Ozaki Masashi,
Yakumaru Shinya,
Handa Taketo,
Nishikubo Ryosuke,
Kanemitsu Yoshihiko,
Saeki Akinori,
Murata Yasujiro,
Murdey Richard,
Wakamiya Atsushi
Publication year - 2018
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.201808385
Subject(s) - tin , materials science , halide , perovskite (structure) , energy conversion efficiency , crystallite , fabrication , solar cell , photovoltaic system , annealing (glass) , optoelectronics , perovskite solar cell , tin dioxide , nanotechnology , chemical engineering , inorganic chemistry , chemistry , metallurgy , electrical engineering , medicine , alternative medicine , pathology , engineering
Abstract Two simple methods to improve tin halide perovskite film structure are introduced, aimed at increasing the power conversion efficiency of lead free perovskite solar cells. First, a hot antisolvent treatment (HAT) was found to increase the film coverage and prevent electrical shunting in the photovoltaic device. Second, it was discovered that annealing under a low partial pressure of dimethyl sulfoxide vapor increased the average crystallite size. The topographical and electrical qualities of the perovskite films are substantively improved as a result of the combined treatments, facilitating the fabrication of tin‐based perovskite solar cell devices with power conversion efficiencies of over 7 %.