Methods of Making Bandgap-Tunable Perovskite Materials
AssigneeThe Florida State University Research Foundation, Inc.
InventorsHanwei Gao, Biwu Ma, Yichuan Ling, Xi Wang
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Abstract
Bandgap-tunable perovskite compositions are provided having the formula CsPb(AxBy)3, wherein A and B are each a halogen. The mixed halide perovskite composition has a morphology which suppresses phase segregation to stabilize a tuned bandgap of the mixed halide perovskite composition. For example, the perovskite may be in the form of nanocrystals embedded in a non-perovskite matrix, which, for example, may have the formula Cs4Pb(AxBy)6, wherein A and B are each a halogen. Solar cells and light-emitting diodes comprising the mixed perovskite compositions are also provided.
Claims18
A method of making a mixed halide perovskite composition comprising:
- depositing a first portion of a first precursor solution on a substrate;
- and
- depositing a first portion of a second precursor solution on the substrate, wherein the second precursor solution is different from the first precursor solution,
- wherein the depositing of the first and second precursor solutions is carried out in a manner effective to produce a mixed halide composition comprising a perovskite having the formula:
- CsPb(AxBy)3 wherein A and B are each a halogen, and the perovskite is in the form of nanocrystals embedded in a non-perovskite matrix, which suppresses phase segregation to stabilize a tuned bandgap of the mixed halide perovskite composition.
Dependencies are inferred from the claim text.