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Effect of Al and Ag co-doping on the structural and optical properties of zinc oxide thin films

XIAOQIANG LUO1, LINHUA XU1,2, FENGLIN XIAN2,* , HAISU QIAN1, WEN WANG1

Affiliation

  1. School of Physics and Optoelectronic Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China
  2. Optoelectronic Materials and Devices Laboratory，Nanjing University of Information Science and Technology, Nanjing 210044, China

Abstract

In view of the potential applications of Al-Ag co-doped ZnO materials in the fields of optoelectronic and microelectronic devices, in this work, we explored the influence of Al-Ag co-doping on the structure, morphology, bandgap and luminescent properties of ZnO films. ZnAgxAlyO (y=Al/Zn=0, 0.005, 0.01, 0.015 and 0.02; x=Ag/Zn=0.005) thin films were coated on glass substrates by a simple wet chemical method, namely the sol-gel method. The morphology, structure, composition and optical properties of the samples were analyzed by scanning probe microscopy, X-ray diffraction, energy dispersive spectroscopy, ultraviolet-visible absorption spectroscopy and photoluminescence, respectively. The results show that Al-Ag co-doping makes the grain size of ZnO decrease and the films surface become smoother. The c-axis orientation degree is decreased and the ultraviolet emission is weakened. However, within the range of doping concentration studied, Al-Ag co-doping has little effect on the optical bandgap of ZnO films. These results are compared with other reported experimental results about the influence of Al-Ag co-doping on ZnO thin films..

Keywords

Zinc oxide, Al-Ag co-doping, Thin films, Optical bandgap, Photoluminescence, SPM.

Submitted at: July 12, 2021
Accepted at: Oct. 5, 2022

Citation

XIAOQIANG LUO, LINHUA XU, FENGLIN XIAN, HAISU QIAN, WEN WANG, Effect of Al and Ag co-doping on the structural and optical properties of zinc oxide thin films, Journal of Optoelectronics and Advanced Materials Vol. 24, Iss. 9-10, pp. 487-493 (2022)