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US 11,616,158 B2Granted
Multi-layered perovskites, devices, and methods of making the same
AssigneeAlliance for Sustainable Energy, LLC
InventorsKai Zhu, Yixin Zhao, Mengjin Yang, Taiyang Zhang
Life of this patent
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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.
Claims7
A device comprising:
- an alkyl ammonium metal halide film comprising lead and a first halogen;
- and
- an alkyl ammonium metal mixed-halide film comprising the first halogen and a second halogen, wherein:
- the alkyl ammonium metal mixed-halide film is adjacent to the alkyl ammonium metal halide film,
- the alkyl ammonium metal mixed-halide film comprises grains having a characteristic length between 1 micron and 2 microns, inclusively,
- the alkyl ammonium metal mixed-halide film has less than 0.25 pin-holes/μm2,
- the alkyl ammonium metal halide film has a thickness between 1 nanometer and 1000 nanometers, inclusively, and
- the alkyl ammonium metal mixed-halide film has a second thickness that is less than the first thickness.
5 more elements
Dependencies are inferred from the claim text.