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US 12,349,585 B2Granted
Pb-free perovskite materials for short wave IR devices
AssigneesHonda Motor Co., Ltd., Utah State University
InventorsGugang Chen, Yi Rao, Xia Li
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Abstract
The present disclosure is directed to methods of making Pb-free perovskites for short-wave IR (SWIR) devices and to various Pb-free perovskite materials disclosed herein. The perovskites disclosed herein have improved chemical stability and long-term stability, while the production methods disclosed herein have improved safety and lower cost.
Claims24
A Pb-free perovskite material having a general formula A3+B+C+2X6 wherein:
- A3+ is a trivalent metal cation,
- B+ is a first monovalent metal cation,
- C+ is a second monovalent metal cation,
- X is a monovalent nonmetal anion,
- the Pb-free perovskite material has been annealed to a surface of a substrate by an annealing process comprising an annealing time between about 10 and 30 minutes,
- the surface of the substrate comprises glass, and
- the Pb-free perovskite material has a wavelength of maximum absorbance from 1000 nm to 2800 nm.
4 more elements
Dependencies are inferred from the claim text.