We report lanthanum oxyhydride (LaHO) as a new inorganic photochromic material for passive light-control coatings. The nanocrystalline films, deposited by magnetron sputtering, show: (i) reversible photodarkening; (ii) very fast optical recovery; (iii) good optical transparency in the clear state.
This work expands the family of rare-earth oxyhydrides and highlights both the potential and current stability challenges of these materials.
Supported by the Latvian Council of Science (lzp-2024/1-0632) and the SWEB project.
