Abstract
Cu2ZnSnS4 (CZTS) thin films were fabricated by a low-cost nanoparticle ink method. The eco-friendly hydrophilic CZTS nanoparticles were mixed with low-cost n-propanol to form nanoparticle ink. To improve crystallinity and remove oxygen element, the CZTS thin films were sulfurized further. The effects of sulfurization temperature on the structure, morphologies, and photovoltaic performances of CZTS thin films were investigated. The results showed that the crystallinity of CZTS thin film was improved with increasing sulfurization temperature. The surface morphology studies demonstrated the formation of compact and homogenous CZTS thin film at a sulfurization temperature of 600 °C. By optimizing thickness of CZTS thin film, the CZTS thin-film solar cell with an optimal efficiency of 2.1% was obtained.
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