Scintillation performances of $CsPbBr_{3}$ thin films deposited by laser ablation under alpha-particles irradiations.

Perovskites are widely investigated as a new generation of materials thanks to their potentialities in different fields. In particular, the photophysical properties of cesium lead bromide ($CsPbBr_{3}$) perovskite have stimulated extensive efforts to properly understand and optimize its performances. Its use as indirect radiation detector is attracting due to its photophysical properties and high stopping power. The film performances are also strictly dependent on the deposition technique. Here we report on the properties of $CsPbBr_{3}$ films deposited by Pulsed Laser Deposition (PLD) technique to be used as scintillator material. $CsPbBr_{3}$ were deposited using a KrF excimer laser ({\lambda = 248 ${nm}$, $\tau$ = 20 ${ns}$) at a fluence of $1 {J/cm^{2}}$, of a mechanochemically synthesized target prepared by mixing 1:1 molar ratio of $PbBr_{2}$ and CsBr powders. The as-deposited films were annealed in air using two different protocols, since annealing treatments are proved to enhance photoluminescence and affect the evolution of the films. The crystalline, morphological and emission properties are reported together with the scintillation properties under alpha-particles irradiations emitted by an Am-241 source.