Optical properties of Mg0.05Zn0.95O/SiO2 nanocomposite films prepared by sol-gel technique

A. Dev, S. Chakrabarti, S. Kar, S. Chaudhuri

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14 Citations (Scopus)

Abstract

Mg0.05Zn0.95O/SiO2 nanocomposite films in the molar ratio 25:75 consisting of Mg0.05Zn0.95O nanoparticles embedded in a dielectric matrix were prepared by sol-gel technique (spin coating). Optical transmittance, Raman effect and photoluminescence measurements of the composites indicated effective capping of the Mg 0.05Zn0.95O nanoparticles (radii 1. 61-1.68 nm) in the host showing practically no variation of particle size with the post deposition annealing treatments. The blue shift of the band gap (4.29-4.23 eV) from that of bulk Mg0.05Zn0.95O indicated strong carrier confinement for samples annealed at T ≤ 873 K. Highly intense UV emission ( ∼4.14 eV) compared to that of defect related emission (2.59 eV) at room temperature was obtained by incorporating 5% Mg in ZnO.

Original languageEnglish
Pages (from-to)195-201
Number of pages7
JournalJOURNAL OF NANOPARTICLE RESEARCH
Volume7
Issue number2-3
DOIs
Publication statusPublished - 1 Jun 2005

Keywords

  • Mg Zn O
  • Nanocomposite
  • Optical property
  • Sol-gel
  • Thin film
  • UV luminescence

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