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US 11,387,420 B2Granted
Methods for producing perovskite halide films
AssigneesAlliance for Sustainable Energy, LLC, Brown University
InventorsKai Zhu, Mengjin Yang, Yuanyuan Zhou, Nitin P. Padture
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Abstract
An aspect of the present disclosure is a method that includes exchanging at least a portion of a first cation of a perovskite solid with a second cation, where the exchanging is performed by exposing the perovskite solid to a precursor of the second cation, such that the precursor of the second cation oxidizes to form the second cation and the first cation reduces to form a precursor of the first cation.
Claims10
A method comprising:
- exposing a first perovskite comprising a first cation, lead, and iodine to a gas comprising at least one of formylimidamide, guanidine, acetamidine, ethylamine, or methylammonia, wherein:
- the exposing results in an exchange of the first cation with a second cation comprising at least one of methylammonium, formamidinium, guanidinium, acetamidinium, or ethylammonium, and
- the exchange converts the first perovskite to a second perovskite comprising lead, iodine, and the second cation.
Dependencies are inferred from the claim text.