Synthesis and characterization of CuSbS2 nanocrystals via hot injection route and investigation of sulfur precursor source

In this paper, chalcostibite (CuSbS2) nanocrystals were successfully synthesized via hot injection route. Sulfur precursor source and the effect of it on crystalline structure and morphology have been investigated. Sulfur powder (S) and thiourea (Tu) were used as a sulfur source and particles obtained were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV-Vis-NIR spectroscopy. Results revealed that CuSbS2 particles prepared by S had high purity and shape and size uniformity. Moreover, band gap determination studies indicated that direct and indirect values for the powders were 1.49 eV and 1.42 eV, respectively. Small difference between these values confirmed that this material has both direct and indirect band gaps.