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

A. Dev; S. Chakrabarti; S. Kar; S. Chaudhuri

doi:10.1007/s11051-005-0152-1

Optical properties of Mg_0.05Zn_0.95O/SiO₂ nanocomposite films prepared by sol-gel technique

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

School of Engineering

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

Mg_0.05Zn_0.95O/SiO₂ nanocomposite films in the molar ratio 25:75 consisting of Mg_0.05Zn_0.95O 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 _0.05Zn_0.95O 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 Mg_0.05Zn_0.95O 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 language	English
Pages (from-to)	195-201
Number of pages	7
Journal	JOURNAL OF NANOPARTICLE RESEARCH
Volume	7
Issue number	2-3
DOIs	https://doi.org/10.1007/s11051-005-0152-1
Publication status	Published (in print/issue) - 1 Jun 2005

Funding

The authors are grateful to Department of Science and Technology (DST), Government of India for financial support during the execution of the programme. One of the authors (A. Dev) likes to thank DST for award of fellowship.

Keywords

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

Access to Document

10.1007/s11051-005-0152-1

Cite this

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

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.",

keywords = "Mg Zn O, Nanocomposite, Optical property, Sol-gel, Thin film, UV luminescence",

author = "A. Dev and S. Chakrabarti and S. Kar and S. Chaudhuri",

year = "2005",

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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

UR - https://www.scopus.com/pages/publications/21644460338

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JO - JOURNAL OF NANOPARTICLE RESEARCH

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IS - 2-3

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