Optical properties of SrTiO3 thin films prepared by metalorganic decomposition

  • Jian Hua Ma*
  • , Xiang Jian Meng
  • , Jin Lan Sun
  • , Tie Lin
  • , Fu Wen Shi
  • , Jun Hao Chu
  • *Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

SrTiO3 thin films were deposited on vitreous silica substrates by metalorganic decomposition (MOD). The films are polycrystalline cubic in structure with the lattice constants of a=0.39nm. Their optical constants (refractive index n and extinction coefficient k) were calculated by the envelope method from the transmittance spectra in the wavelength range of 190nm to 1100nm. The refractive index of the present films is found to be higher than that of the other SrTiO3 films prepared by RF sputtering, sol-gel and chemical vapour deposition. The dispersion of the refractive index in the films follows the single electronic oscillator model with oscillator strength (So) of 0.88×1014m-2 and oscillator energy (E0) of 6.40eV. The optical band gap of the films was estimated to be 3.68eV.

Original languageEnglish
Pages (from-to)610-614
Number of pages5
JournalChinese Physics (Overseas Edition)
Volume14
Issue number3
DOIs
StatePublished - Mar 2005
Externally publishedYes

Keywords

  • Metalorganic decomposition
  • Optical properties
  • SrTiO thin films

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