Ni-Doped ZnO Thin Films Deposited by Pneumatic Spray Pyrolysis
No Thumbnail Available
Date
2019
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Trans Tech Publications Ltd, Switzerland
Abstract
The objective of the present work is the study the Ni concentration effect on the optical,
structural and electrical properties of ZnO:Ni thin films deposited by pneumatic spray pyrolysis
method. Un-doped and Ni-doped ZnO thin films were prepared from zinc acetate dihydrate and nickel
chloride hexahydrate dissolved in distilled water onto glass substrates by pneumatic spray pyrolysis
method. Solution concentration, substrate temperature and nozzle-substrate distance were kept
constant during all deposition processes. Effect of nickel content on the optical, structural and
electrical properties of as-prepared films obtained was investigated by UV–Vis-NIR
spectrophotometry, X-ray diffraction and four-point probe technique. The results indicate that the
deposited films are well adherent to the substrates, present surface roughness and have a preferential
growth in the (002) direction. The observed transmittance in the visible region was situated between
60% and 70%. For Ni-doped ZnO, there are two separate phases. The Urbach energy, grain size, and
electrical conductivity increase with Ni content. The same behavior for both the optical energy gap
and the ZnO:Ni lattice parameters.
Description
Keywords
Thin films; Pneumatic spray pyrolysis; Doping effect; Optical properties; Electrical
conductivity