Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 57, Issue 40, Pages 13221-13225Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201808385
Keywords
crystal growth; energy conversion; lead-free perovskites; perovskite solar cells; thin films
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Funding
- JST ALCA [JPMJAL1603]
- COI, CREST [JPMJCR16N3]
- ERATO [JPMJER1302]
- NEDO
- JSPS
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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%.
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