Open AccessEffect of precursor ratios on the structural, morphological and optical properties of CBD-CdS films
Author(s) -
Tarkeshwar Sinha,
Ayush Khare
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/798/1/012023
Subject(s) - photoluminescence , scanning electron microscope , chemical bath deposition , band gap , materials science , cadmium sulfide , analytical chemistry (journal) , fourier transform infrared spectroscopy , tin oxide , cadmium oxide , infrared , thin film , doping , chemistry , nanotechnology , optics , cadmium , optoelectronics , composite material , chromatography , metallurgy , physics
Cadmium sulfide (CdS) films were deposited on fluorine doped tin oxide (FTO) glass substrates by chemical bath deposition (CBD). X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), photoluminescence (PL), and Fourier transform infrared (FT-IR) analyses were employed to compare the structural, morphological, and optical properties of deposited films. The XRD studies confirmed the cubic crystalline nature of the deposited films, and the intensities of the peaks were found to vary for different precursor ratios. The results of SEM study show that the films were smooth and uniform. The RMS surface roughness values of the CdS films were found to be in the range of 25.42nm to 35.33nm. Energy band-gap values of the CdS films were found in the range of 2.32eV to 2.39eV. Two distinct bands (centred at 489nm and 556nm) were found in the PL emission spectra. S-C-N, Cd-S, and C-S vibrations were observed to dominate in the FT-IR spectra.