SYNTHÈSE ET CARACTÉRISATION DES MATÉRIAUX PÉROVSKITES À HALOGÉNURE CsPbI2Br et CsPbIBr2 POUR DES APPLICATIONS PHOTOVOLTAIQUES

Abstract

Caesium halide perovskite materials, including CsPbI₂Br and CsPbIBr₂, are promising candidates for photovoltaic applications due to their optoelectronic properties. A synthesis and characterization of these materials using several analytical techniques has been carried out. According to X-ray diffraction (XRD), the crystal size of the materials under study was 35.13 nm for CsPbI₂Br and 24.70 nm for CsPbIBr₂. These measurements indicate good crystallinity, essential for high photovoltaic performance. The experimental optical gaps of these materials were determined. The optical gap was found to be 1.85 eV for CsPbI₂Br and 2.02 eV for CsPbIBr₂. These values are compatible with the efficient absorption of sunlight, making these materials attractive for photovoltaic devices. Photoluminescence measurements also confirmed these experimental optical gaps, indicating an optical gap of 1.9 eV for CsPbI₂Br and 2.10 eV for CsPbIBr₂. These results suggest that these materials possess favorable optical qualities for the conversion of solar energy into electricity.

https://doi.org/10.70974/mat09225001