Effect of femtosecond irradiation on the luminescence of CsPbI3 perovskite crystals in borogermanate glass

The article demonstrates femtosecond-laser-induced crystallization of CsPbI3 perovskite nanocrystals in borogermanate glass with no additional heat treatment. With an increase in the laser radiation power, the mean size of the precipitated crystals increases, which leads to the luminescence redshift from 660 up to 700 nm and its width decrease from 60 down to 35 nm. An increase in the mean size of CsPbI3 nanocrystals is also accompanied by an increase in the size of the laser exposure modified region. The appearance of CsPbI3 after irradiation with without additional heat treatment indicates the prospects for using this material for the repeated optical information recording.