Comparison of the optical responses of O-poor and O-rich thermochromic VOXfilms during semiconductor-to-metal transition

Zhenfei Luo, Zhiming Wu, Tao Wang, Xiangdong Xu, Weizhi Li, Wei Li, Yadong Jiang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

11 Citations (Scopus)

Abstract

O-poor and O-rich thermochromic vanadium oxide (VOX) nanostructured thin films were prepared by applying reactive direct current magnetron sputtering and post-annealing in oxygen ambient. UV-visible spectrophotometer and spectroscopic ellipsometry were used to investigate the optical properties of films. It was found that, when the O-poor VOXthin film underwent semiconductor-to-metal transition, the values of optical conductivity and extinction coefficient in the visible region increased due to the existence of occupied band-gap states. This noticeable feature, however, was not observed for the O-rich film, which showed a similar optical behavior with the stoichiometric crystalline VO2films reported in the literatures. Moreover, the O-poor VOXfilm exhibits consistent variations of transmission values in the visible/near-infrared region when it undergoes semiconductor-to-metal transition.
Original languageEnglish
Pages (from-to)1122-1126
Number of pages5
JournalJournal of Physics and Chemistry of Solids
Volume73
Issue number9
DOIs
Publication statusPublished - 1 Sep 2012
Externally publishedYes

Keywords

  • A. Thin films
  • D. Optical properties

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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