科研之友
微信
新浪微博
Facebook
分享链接
摘要
A simple and cost effective spray pyrolysis technique was employed to deposit nanostructured ZnO thin films at the substrate temperature of 523 K on glass substrates from the aqueous solution of zinc acetate dehydrate. The effect of various ratios of water and ethanol solvents on the structural, morphological, optical, electrical and sensing characteristics of ZnO film was investigated. X-ray diffraction patterns revealed the polycrystalline nature of the films with hexagonal wurtzite structure. Morphology and grain size of the films were observed using Field Emission Scanning Electron Microscope (FE-SEM). SEM images revealed the uniform distribution of the spherical grains particularly for the films prepared with ethanol as solvent. The optical absorbance spectra of the thin films were studied using UV-Vis spectrophotometer in the wavelength range of 300-800 nm which showed a sharp absorption edge with overall transmittance of more than 85%. The sensing performance of the thin films towards the volatile organic compounds (VOC's) like acetaldehyde, ethanol, ammonia, hydrogen peroxide, and ethanolamine (MEA) were studied and films showed better response towards MEA than others.
- 出版日期2014-12
