Synthesis of rubidium lead iodide perovskite nanocrystals in chalcogenide glasses and high nonlinear optical performance of the nanocomposites
Résumé
Recently, inorganic metal halide perovskites (MHP) have been demonstrated remarkable performance across a wide range of optoelectronic applications. Compared with common cesium lead halide (CsPbX3) MHP, rubidium lead halide (RbPbX3) MHP possess higher chemical and structural stability but more challenging to synthesize because of their low tolerance factors. The unique preparation process of chalcogenide glass (ChG) allows the growth of RbPbX3 MHP within, facilitating the study of their internal MHP growth trends, spectral characteristics and nonlinear optical properties when ChG is used as a substrate material. In this study, we successfully synthesized RbPbI3 nanocrystals in a ChG (GeS2-Sb2S3) system, and we studied third-order optical nonlinear attributes of the MHP-ChG nanocomposites via Z-scan and I-scan techniques in a wavelength range of 700–940 nm. Experimental findings indicate that adding RbPbI3 MHP improved nonlinear absorption and refraction characteristics of the ChG. In addition, the MHP-ChG nanocomposites exhibited exceptional optical limiting performance as a result of their strong two-photon absorption capacity.