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US 10,700,229 B2Granted
Multi-layered perovskites, devices, and methods of making the same
AssigneeAlliance for Sustainable Energy, LLC
InventorsKai Zhu, Yixin Zhao, Mengjin Yang, Taiyang Zhang
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Abstract
Methods are described that include contacting an alkyl ammonium metal halide film with an alkyl ammonium halide, where the alkyl ammonium metal halide film includes a first halogen and a metal, the alkyl ammonium halide includes a second halogen, such that the contacting forms an alkyl ammonium metal mixed-halide film that interfaces with the alkyl ammonium metal halide film, where the alkyl ammonium metal mixed-halide film includes the first halogen, the second halogen, and the metal.
Claims14
A method comprising:
- contacting a first perovskite film comprising ABX3 with a solution comprising an alkyl ammonium halide, wherein:
- A comprises at least one of methyl ammonium or formamidinium,
- B comprises lead,
- X comprises a first halogen,
- the alkyl ammonium halide comprises a second halogen, X′,
- the alkyl ammonium halide is present in the solution at a first concentration between greater than 0 M (mol/L) and 0.05 M,
- the contacting forms a second perovskite film comprising A, B, X, and X′, and
- X′ is present in the second perovskite film at a second concentration between greater than zero and 1 wt %.
5 more elements
Dependencies are inferred from the claim text.