Photoluminescence Studies on Copper Zinc Sulfide Thin Films Synthesized Through Chemical Bath Deposition

This paper reports on room temperature photoluminescence (PL) studies on copper zinc sulfide (CuZnS) films that are deposited through chemical bath deposition (CBD) technique. The PL emission is a broad emission in greenish red region of the spectra. PL spectroscopy is employed as a non-destructive tool to identify copper rich and copper deficient areas of the film. The emissions attributing to copper related and zinc related defects are well distinguished in copper rich and zinc rich films. PL also serves as a contactless method to determine the uniformity of the films. Structural and morphological analysis of the film gives further confirmation of the results obtained from PL analysis