US Patent Issued to City University of Hong Kong on Oct. 27 for "Hydrochromic halide perovskite, its preparation and use the same" (Chinese Inventors)

ALEXANDRIA, Va., Oct. 27 -- United States Patent no. 12,774,413, issued on Oct. 27, was assigned to City University of Hong Kong (Kowloon, Hong Kong).

"Hydrochromic halide perovskite, its preparation and use the same" was invented by Feng Wang (Kowloon, Hong Kong) and Jiangkun Chen (Kowloon, Hong Kong).

According to the abstract* released by the U.S. Patent & Trademark Office: "A hydrochromic halide perovskite includes a CsxTbyFz halide perovskite doped with a lanthanide ion dopant, which is capable of water-induced reversible phase transformation between pristine state and wet state, and exhibits reversible change in optical emission under ultraviolet excitation. A printable pattern comprising a film of the hydrochromic halide perovskite...