Non-Vacuum Single Step Synthesis of Large-Grain Size CZTS Photo Absorber for Thin Film Solar Cells by Flux Assisted Chemical Spray

摘要

S added by soaking, CZTS films with large grain size are realized. XRD patterns show characteristic diffraction lines with increased intensity and decreased FWHM in CZTS thin films both with Na flux during in-situ deposition and post deposition annealing step affirming the increase in crystallinity and grain size. This is supported by Raman studies. Whereas the average crystallite size of CSP-CZTS film is ~25 nm, using the Na