Influence of cadmium ion (Cd2+)concentration on the optical properties of electrodeposited CdO-NiO thin films.
Journal Title: IOSR Journal of Applied Physics (IOSR-JAP) - Year 2018, Vol 10, Issue 5
Abstract
CdO-NiO thin films were successfully deposited on glass substrates using electro-deposition technique. Cadmium chloride salt provided source of cadmium ion, citric acid as oxidizing agent, nickel chloride as source of nickel ion, and sodium hydroxide as pH adjuster. The films were deposited at various concentrations. The optical properties were investigated using UNICO-UV-2012 PC spectrophotometer. The optical results showed that the films exhibited interference patterns based on the variation of the transmittance with growth parameter. The maximum transmittances are 63%, 65%, 60% and 64% for 0.01M, 0.05M, 0.07M and 0.1M samples of CdO/NiO thin films respectively. The band-gaps were found to be between 2.38eVand 2.50 eV as the concentrations were varied and have extinction coefficient of that fluctuates between maxima and minima. The properties of high transmittance in the visible region and wide direct band gap of the films suggest that they can be used as window layers in a heterojunction solar cell as well as in optoelectronic applications.
Authors and Affiliations
S. O. Onyishi1,2*, M. N. Nnabuchi1,3, C. Augustine4
Keywords
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