Optical characterization of ZnO thin films prepared by Chemical bath deposition method

摘要

Optical parameters play important role in selectivity of thin films in solar cells and opto electronic devices.Since ZnO thin films being transparent and conducting,are of high demand in these applications.The present work is carried out by deposition of ZnO films using chemical bath deposition method(CBD).Samples were prepared for different deposition times.Since deposition method is important in determining optical parameters,prepared samples were investigated with UV-Visible and FTIR spectroscopy.Parameters like transmittance(T),absorption coefficient(α),extinction coefficient(k),reflectance(R)and refractive index(n)of the samples were calculated and their variation for different deposition time were studied.It is observed that with time of deposition,parameters like T and R decreases and on the other hand k and n increases.