skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Emission Properties from ZnO Quantum Dots Dispersed in SiO{sub 2} Matrix

Abstract

Dispersion of ZnO quantum dots in SiO{sub 2} matrix has been achieved in two techniques based on StOeber method to form ZnO QDs-SiO{sub 2} nanocomposites. Sample A is formed with random dispersion by adding tetraethyl orthosilicate (TEOS) to an ethanolic solution of ZnO nanoparticles and sample B is formed with a chain-like ordered dispersion by adding ZnO nanoparticles to an already hydrolyzed ethanolic TEOS solution. The photoluminescence spectra of the as-grown nanocomposites show strong emission in the ultraviolet region. When annealed at higher temperature, depending on the sample type, these show strong red or white emission. Interestingly, when the excitation is removed, the orderly dispersed ZnO QDs-SiO{sub 2} composite shows a very bright blue fluorescence visible by naked eyes for few seconds indicating their promise for display applications.

Authors:
;  [1]
  1. Department of Solid State Physics, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032 (India)
Publication Date:
OSTI Identifier:
21608131
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1349; Journal Issue: 1; Conference: 55. DAE solid state physics symposium 2010, Manipal (India), 26-30 Dec 2010; Other Information: DOI: 10.1063/1.3606317; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; ANNEALING; COMPOSITE MATERIALS; EMISSION SPECTROSCOPY; EXCITATION; FLUORESCENCE; MATRICES; PHOTOLUMINESCENCE; QUANTUM DOTS; RANDOMNESS; SILICATES; SILICON OXIDES; ULTRAVIOLET RADIATION; ZINC OXIDES; CHALCOGENIDES; ELECTROMAGNETIC RADIATION; EMISSION; ENERGY-LEVEL TRANSITIONS; HEAT TREATMENTS; LUMINESCENCE; MATERIALS; NANOSTRUCTURES; OXIDES; OXYGEN COMPOUNDS; PHOTON EMISSION; RADIATIONS; SILICON COMPOUNDS; SPECTROSCOPY; ZINC COMPOUNDS

Citation Formats

Panigrahi, Shrabani, and Basak, Durga. Emission Properties from ZnO Quantum Dots Dispersed in SiO{sub 2} Matrix. United States: N. p., 2011. Web. doi:10.1063/1.3606317.
Panigrahi, Shrabani, & Basak, Durga. Emission Properties from ZnO Quantum Dots Dispersed in SiO{sub 2} Matrix. United States. doi:10.1063/1.3606317.
Panigrahi, Shrabani, and Basak, Durga. Fri . "Emission Properties from ZnO Quantum Dots Dispersed in SiO{sub 2} Matrix". United States. doi:10.1063/1.3606317.
@article{osti_21608131,
title = {Emission Properties from ZnO Quantum Dots Dispersed in SiO{sub 2} Matrix},
author = {Panigrahi, Shrabani and Basak, Durga},
abstractNote = {Dispersion of ZnO quantum dots in SiO{sub 2} matrix has been achieved in two techniques based on StOeber method to form ZnO QDs-SiO{sub 2} nanocomposites. Sample A is formed with random dispersion by adding tetraethyl orthosilicate (TEOS) to an ethanolic solution of ZnO nanoparticles and sample B is formed with a chain-like ordered dispersion by adding ZnO nanoparticles to an already hydrolyzed ethanolic TEOS solution. The photoluminescence spectra of the as-grown nanocomposites show strong emission in the ultraviolet region. When annealed at higher temperature, depending on the sample type, these show strong red or white emission. Interestingly, when the excitation is removed, the orderly dispersed ZnO QDs-SiO{sub 2} composite shows a very bright blue fluorescence visible by naked eyes for few seconds indicating their promise for display applications.},
doi = {10.1063/1.3606317},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1349,
place = {United States},
year = {2011},
month = {7}
}