Abstract
Mist-atomization deposition method was applied in order to grow ZnO nanoparticles on Au-seeded glass substrates acting as seeded template. Ag doped ZnO thin films were deposited on ZnO seeded templates by solution-immersion method. The influence of Ag doping content on the optical and Raman scattering properties of ZnO films were systematically investigated by UV-Vis transmittance measurement measured by ultra-violet visible spectroscopy (UV-Vis) and Raman scattering spectrum measured by Raman spectroscopy under room temperature. From UV-Vis transmittance measurement, the incorporation of Ag dopant to the ZnO makes the transmittance wavelength shifted to the shorter wavelength as compared to the pure ZnO. From Raman spectra, 4 cm-1 downshift is observed in Ag-doped thin films as compared to pure ZnO thin films. This Raman peak shift shows that a tensile stress existed in the Ag-doped ZnO film.
Highlights
ZnO is a II–VI semiconductor compound with wide direct band-gap of 3.37 eV and large excitation binding energy of 60 meV at room temperature
We focus on the synthesis of un-doped and Ag-doped ZnO from solution-based method
As-prepared ZnO and Ag-doped ZnO have been deposited by two-step deposition methods; mistatomizer and solution-immersion
Summary
ZnO is a II–VI semiconductor compound with wide direct band-gap of 3.37 eV and large excitation binding energy of 60 meV at room temperature. Doped ZnO shows high electrical conductivity and improved optical properties by doping with suitable elements. The optical properties and Raman spectroscopic of as-prepared samples are studied. The optical properties and Raman spectroscopic of un-doped ZnO and 1 at.
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