Proceedings of MATSUS Fall 2024 Conference (MATSUSFall24)
Publication date: 28th August 2024
Chalcogenide perovskites have recently emerged as a popular class of materials for optoelectronic applications. Remarkable structural and optoelectronic properties make chalcogenide perovskites a promising candidate for solar energy conversions. High stability and non-toxicity make them a potential alternative to lead halide perovskites. This study reports BaTeS3, a tellurium-based chalcogenide perovskite with detailed structural and optoelectronic properties. Thermogravimetric analysis (TGA) and temperature-dependent Raman spectra demonstrate that the material possesses good thermal stability. This material exhibited exceptional panchromatic absorption with a band gap of 1.81 eV. The potential of BaTeS3 in photoelectrochemical water splitting was also explored. Mott Schottky analysis of the films revealed n-type conductivity with band positions well suited for solar water oxidation reactions. Under one sun illumination, photoelectrochemical devices fabricated with this material gave a photocurrent density of 0.15 mA/cm2 at 0.62 V vs. Ag/AgCl. Electrochemical impedance, as well as the bulk impedance of the material, was studied in detail.
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