XRD, AFM and UV-Vis Optical Studies of PbSe Thin Films Produced by Chemical Bath Deposition Method

Abstract

PbSe thin films have been deposited on microscope glass substrates by chemical bath deposition technique. The chemical bath consisted of lead nitrate, sodium selenate and triethanolamine solutions. The in uence of bath temperature on the properties of PbSe lms was investigated. The X-ray diffraction, atomic force microscope and UV/Vis Spectrophotometer were used to obtain the structural characterization, surface morphological and absorbance data, respectively. Based on the X-ray di raction results, the thin lms obtained were found to be polycrystalline in nature with cubic structure. The intensity of the (111) peak showed a signi cant increased as the bath temperature was increased from 40 to 80 C. The lms deposited at 80 C indicated that the crystallinity was improved and more PbSe peaks were observed. On the other hand, the grain size, lm thickness and surface roughness were increased while band gap energy decreased as could be observed in atomic force microscope and UV-Vis optical studies, respectively.