Investigation of Cu2ZnSnS4 film by Simple Flow-Coating Technique

Abstract

Abstract This present study aims to investigate a Cu2ZnSnS4 (CZTS) film obtained by simple flow-coating technique using with CZTS precursor solution synthesized by non-vacuum sol-gel process and annealing without sulfurization. The precursor solution was prepared by mixture CuCl2, ZnCl2 SnCl2 and CH4N2S molar to obtain the ion of Cu, Zn, Sn and S. The CZTS film was investigated by using XRD, FE-SEM, and UV-Visible Spectroscopy, respectively. The XRD results show main peak at the angle 28.48° according with (112) plane on the kieserite phase of tetragonal structure, crystallite size average about ∽ 103.137 ± 0.9788 nm. The surface morphology was observing microscopic porosity structure of the particles and cross-section achieve a film thickness of approximately 32.92 ± 0.62 μm. The EDX result was revealed that whereas the composition nonuniformity from the simple flow-coating process. The optical properties show band gap energy quite close to the optimum value ∼ 1.518 eV, good optical absorption (∼105 cm−1). These characteristics make the simple fabrication CZTS film suitable material as an absorber layer in photovoltaic.