Structural and optical properties of CdTe thin film nanoparticles prepared using chemical bath deposition technique with different Te concentration

Abstract The CdTe thin films with different Te concentration were grown by chemical bath deposition technique using glass substrates. The prepared thin films were characterized by X-ray diffraction (XRD), Raman spectroscopy, UV–Visible diffuse reflectance spectroscopy, photoluminescence (PL). The X-ray diffraction (XRD) analysis shows that the prepared thin films are polycrystalline in nature with Zinc blend structure. Decrease in the intensities of XRD peak for decreasing the Te concentration. The characteristic phonon modes of CdTe thin film nanoparticle confirmed by Raman spectra analysis. Optical absorption studies shows that direct transition with decrease in band gap energy with decreasing the Te molar concentration. Green emission was observed for prepared CdTe thin films excited with 325 nm.