Supercritical CO2-assisted amorphization of WO2.72 and its high-efficiency photothermal conversion

Abstract

Amorphous materials with unique atomic arrangements have attracted great attention owing to their unique optical and electronic properties. In this work, amorphization of pristine WO_2.72 was successfully achieved with the assistance of supercritical carbon dioxide (SC CO₂). Experimental results indicate that the obtained amorphous sample has strong optical absorbance in the near-infrared (NIR) region. Furthermore, an excellent photothermal conversion efficiency (PCE) of 52.5% indicates that it enables the capture of solar energy and converts it into thermal energy efficiently.