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

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

Research output: Contribution to journalArticle

13 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.

LanguageEnglish
Pages195-201
Number of pages7
JournalJOURNAL OF NANOPARTICLE RESEARCH
Volume7
Issue number2-3
DOIs
Publication statusPublished - 1 Jun 2005

Fingerprint

Sol-gel
Nanocomposite films
Nanocomposites
SiO2
Optical Properties
Sol-gels
Nanoparticles
nanocomposites
Optical properties
gels
optical properties
nanoparticles
Opacity
Photoluminescence
Transmittance
Spin coating
Band Gap
Raman
Annealing
Particle Size

Keywords

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

Cite this

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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.",
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Optical properties of Mg0.05Zn0.95O/SiO2 nanocomposite films prepared by sol-gel technique. / Dev, A.; Chakrabarti, S.; Kar, S.; Chaudhuri, S.

In: JOURNAL OF NANOPARTICLE RESEARCH, Vol. 7, No. 2-3, 01.06.2005, p. 195-201.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Optical properties of Mg0.05Zn0.95O/SiO2 nanocomposite films prepared by sol-gel technique

AU - Dev, A.

AU - Chakrabarti, S.

AU - Kar, S.

AU - Chaudhuri, S.

PY - 2005/6/1

Y1 - 2005/6/1

N2 - 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.

AB - 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.

KW - Mg Zn O

KW - Nanocomposite

KW - Optical property

KW - Sol-gel

KW - Thin film

KW - UV luminescence

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