SPRAY PYROLYSIS DEPOSITED ZnO NANOSTRUCTURES AS TRANSPARANT WINDOW LAYER FOR PHOTOVOLTAIC APPLICATION

R.M. Mohite; R.R. Kothawale

Volume : III, Issue : XII, December - 2014

SPRAY PYROLYSIS DEPOSITED ZnO NANOSTRUCTURES AS TRANSPARANT WINDOW LAYER FOR PHOTOVOLTAIC APPLICATION

R. M. Mohite, R. R. Kothawale

Abstract :

Zinc Oxide nanostructures (ZnONS) have been synthesized by spray pyrolysis technique. The prepared samples were characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM), and Transmission electron microscope (TEM). XRD pattern of the prepared sample shows preferential orientation along (002) crystallographic plane and can be indexed to wurtzite structure (JCPDS 36-1451). The X-ray diffraction patterns and transmission electron microscopy for the film showed that the ZnO exibit hexagonal wurtzite crystal structure. Also XRD confirmed that the ZnONS are polycrystalline in nature and no additional peaks were present showing the formation of pure ZnO nanoparticles (ZnONPL). The UV-Vis spectra showed absorbance peaks in the 300-800nm region. Optical transmittance spectra gives excellent transmittance (>85%) and a sharp cut off edge at 385nm. From the spectra, direct band gap of ZnO is determined which is 3.37eV at room temperature that makes ZnO useful for optoelectronic devices such as solar cell, photonic crystals, photodiodes, etc.