Transparent conducting Sc-codoped AZO film prepared from ZnO:Al-Sc by RF-DC sputtering

Jing Chie Lin, Kun Cheng Peng, Hsueh Lung Liao, Sheng Long Lee

Research output: Contribution to journalArticlepeer-review

51 Scopus citations

Abstract

Al and Sc-codoped zinc oxide (also expressed as Sc-codoped AZO or ZnO:Al-Sc) films were sputtered on STN glass using RF power sources on ZnO and DC power sources on Al-1.7wt.% Sc alloy. X-ray diffraction (XRD) of the codoped films displayed that they are crystalline and textured at (002) and (103). Examination through transmission electron microscopy (TEM) depicted that these films consists of columnar grains. X-ray photoelectron spectroscopy (XPS) analysis of the films indicated that the O1s comprises O(I), O(II), O(III), and O(IV). The component O(I) centered at 530.00 ± 0.15eV was attributable to Sc2O3; the O(III) at 531.25 ± 0.20eV was to the oxygen deficient regions within the matrix of ZnO. The transmittance of visible light (i.e., wavelength in the range from 400 to 800nm) for the film was higher than 80%. The electrical resistivity is lower (1.76 < 2.81Ω-cm), the corrosion-resistance in 3.5% NaCl solution is better for the codoped film in comparison with the usual AZO. Heat treatment of the films (at 200-400°C for 1h) improved the optical transmittance, electrical conductivity, and corrosion-resistance in saline solution.

Original languageEnglish
Pages (from-to)5349-5354
Number of pages6
JournalThin Solid Films
Volume516
Issue number16
DOIs
StatePublished - 30 Jun 2008

Keywords

  • Annealing
  • Columnar grains
  • Corrosion characteristic
  • Resistivity
  • Sc-doped ZnO:Al film

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