Optical and Structural Properties of ZnO Thin Films Fabricated by SILAR Method

Abstract

ABSTRACT:A novel and simple chemical route was used for the deposition of ZnO thin film from aqueous solution of zinc-ammonia complex, integrating the merits of successive ionic layer adsorption and reaction (SILAR) and chemical bath deposition methods. ZnO thin films on glass substrates were deposited with the precursor of zincammonia complex. Characterization techniques of XRD, SEM, EDAX and DRS are used to characterize ZnO thin films. X-ray diffraction study show that the film prepared in this work exhibits good crystallinity with the hexagonal wurtzite crystalline structure and the preferential orientation along (0 0 2) plane, with a texture coefficient value of ~2.56, average crystallite size of 28.92 nm and with lattice constants a = b = 3.257 Å, c = 5.215 Å. EDAX spectrum indicates that the film consists of zinc and oxygen elements. The optical band gap energy of the thin films is calculated from optical absorption spectrometry using DRS data and the value was found to be direct allowed transition ~3.22 eV.

Effect of Oxygen Sputter Pressure on the Structural, Morphological and Optical Properties of ZnO Thin Films for Gas Sensing Application

“…The diffraction peaks can be indexed to ZnO (JCPDS no. 36-1451), consistent with the data reported in the literature [ 37 ]. XRD spectra were recorded in the 2ϴ range 10°–100°.…”

Properties of Zinc Oxide thin layers for Photovoltaic Applications

“…Thickness was determined using the mass-loss formula [12,13]. Mass added to the slide, weighed before the ZnO layer was applied and then weighed afterward the layer had been added.…”

“…They were also not as tough as the previous samples. This was attributed to lack of annealing [4,12,14]. It was only the first three samples that were though and without brittle.…”

Physical properties of nanostructured ZnO thin films deposited by DC magnetron sputtering method with different volume of O2 in carrier gas

“…Using this method the optical band gap value obtained for ZnO nanoparticles was 3.91, 4.17 and 4.41 eV for 5%, 10% and 15% O 2 in plasma which are greater than that of bulk. The properties of particles with nano meter sized exhibit quite different from bulk materials because of some emergence phenomenon like quantum size confinement, wave like transport and predominance of interfacial [48].…”