Effect of Sn-doped on microstructural and optical properties of ZnO thin films deposited by sol-gel method

Chien Yie Tsay, Hua Chi Cheng, Yen Ting Tung, Wei Hsing Tuan, Chung Kwei Lin

Research output: Contribution to journalArticle

183 Citations (Scopus)

Abstract

In this study, transparent thin films of Sn-doped ZnO (ZnO:Sn) were deposited onto alkali-free glass substrates by a sol-gel method; the effect of Sn doping on crystallinity, microstructural and optical properties was investigated. The atomic percentages of dopant in ZnO-based sols were Sn/Zn = 0, 1, 2, 3, and 5 at.%. The as-deposited films were pre-heated at 300 °C for 10 min and then annealed in air at 500 °C for 1 h. The results show that Sn-doped ZnO thin films demonstrate obviously improved surface roughness, enhanced transmittance in the 400-600 nm wavelength range and reduced average crystallite size. Among all of the annealed ZnO-based films in this study, films doped with 2 at.% Sn concentration exhibited the best properties, namely an average transmittance of 90%, an RMS roughness value of 1.92 nm and a resistivity of 9.3 × 102 Ω-cm.

Original languageEnglish
Pages (from-to)1032-1036
Number of pages5
JournalThin Solid Films
Volume517
Issue number3
DOIs
Publication statusPublished - Dec 1 2008
Externally publishedYes

Keywords

  • Sn doping
  • Sol-gel method
  • Transparent oxide semiconductors
  • ZnO thin films

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Metals and Alloys
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

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