Crystal, optical, and electrical characteristics of transparent conducting gallium-doped zinc oxide films deposited on flexible polyethylene naphthalate substrates using radio frequency magnetron sputtering

Huai Shan Chin, Long Sun Chao, Chia Ching Wu

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

Gallium-doped zinc oxide (GZO) thin films were deposited on flexible polyethylene naphthalate substrates using radio frequency (RF) magnetron sputtering. The resulting GZO thin films were polycrystalline, displaying a hexagonal wurtzite-type crystal structure with a preferred grain orientation in the (002) direction. The covalent bond length of the films decreased as the RF deposition power increased, an inverse trend to that of the residual stress. In the transmission spectra, the absorption edge was about 380 nm, and the optical transmittance decreased from 93.2% to 88.6% in the visible range as the RF deposition power increased from 75 to 150 W. A minimum resistivity of 2.994 × 10-3 Ω-cm was obtained for the film deposited at 125 W, with a Hall mobility of 8.652 cm2 V s-1 and a carrier concentration of 6.3417 × 1019 cm-3. The figure of merit results indicated that the film deposited at 125 W possessed satisfactory optical and electrical properties for potential applications.

Original languageEnglish
Pages (from-to)90-96
Number of pages7
JournalMaterials Research Bulletin
Volume79
DOIs
Publication statusPublished - 2016 Jul 1

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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