Polyvinylbutyral assisted synthesis and characterization of kesterite quaternary semiconductor Cu sub(2)ZnSnSe sub(4) nanofibers by electrospinning route

Kesterite quaternary semiconductor Cu sub(2)ZnSnSe sub(4) nanocrystals were successfully prepared via a relatively simple electrospinning route and characterized using X-ray powder diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and transmission electron microscopy (TEM). Semiconductor Cu sub(2)ZnSnSe sub(4) nanofibers were obtained for PVB/ Cu sub(2)ZnSnSe sub(4) precursor at an applied voltage of 20 kV after annealing treatment at 500 degree C for 2 h. The optical property of Cu sub(2)ZnSnSe sub(4) nanocrystals was also recorded by means of UV-vis absorption spectroscopy. It was shown that the dimension effect of composites could be enhanced by increasing the electrospinning conditions (voltage, distances, concentrations, viscosity) and the CZTSe nanofibers prepared at annealing process exhibited more intense optical properties. Temperature dependent studies were conducted and the annealing of composites was found to be the key factor in determining the phase formation.