Effects of growth temperature on Mg-doped ZnO films fabricated by pulsed-laser deposition

Hau Wei Fang, Jenh-Yih Juang, Shiu Jen Liu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Magnesium-doped zinc oxide (MZO) films were fabricated by pulsed-laser deposition (PLD) at various substrate temperatures (Ts). The substitution of Mg for Zn sites (MgZn) in the films was confirmed by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and room-temperature photoluminescence (RTPL) measurements. Characteristic deep-level emissions (DLE) observed in the RTPL spectra further indicate the presence of Zn vacancies (VZn) in the MZO films. Moreover, it was found that the intensity of the blue emission corresponding to VZn increases with increasing Ts, indicating the important role played by Ts on the incorporation of Mg into ZnO matrix. Hall effect measurements reveal the p-type conduction of the MZO films grown at 400°C. The p-type characteristic is attributed to the formation of nMgZn - VZn complex which could act as acceptor for MZO films.

Original languageEnglish
Pages (from-to)992-1000
Number of pages9
JournalInternational Journal of Nanotechnology
Volume14
Issue number12
DOIs
StatePublished - 1 Jan 2017

Keywords

  • Mg doping
  • p-type
  • photoluminescence
  • PLD
  • pulsed-laser deposition
  • X-ray photoelectron spectroscopy
  • XPS
  • ZnO films

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