Synthesis and characterizations of Cu2MgSnS4 thin films with different sulfuration temperatures

Cu2MgSnS4 thin films were prepared by sol-gel spin-coating route followed by sulfuration. The effects of the annealing temperature on structural, optical and electrical characteristics were investigated. All the annealed CMTS thin films show Cu-poor and slightly S-poor condition. X-ray diffraction and X-ray photoelectron spectroscopy results reveal the formation of zinc-blende structure CMTS thin films. The increase of sulfurization temperature improves the crystallinity and diminishes the bandgaps of CMTS films. The CMTS solar cell shows a better efficiency of 0.78% with the optimized temperature of 530 degrees C. (C) 2019 Elsevier B.V. All rights reserved.