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

Journal Article · Fri Jul 15 04:00:00 EDT 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3606317· OSTI ID:21608131

Panigrahi, Shrabani; Basak, Durga ^[1]

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1. Department of Solid State Physics, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032 (India)

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.

• OSTI ID: 21608131
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1349; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
ANNEALING
CHALCOGENIDES
COMPOSITE MATERIALS
ELECTROMAGNETIC RADIATION
EMISSION
EMISSION SPECTROSCOPY
ENERGY-LEVEL TRANSITIONS
EXCITATION
FLUORESCENCE
HEAT TREATMENTS
LUMINESCENCE
MATERIALS
MATRICES
NANOSTRUCTURES
OXIDES
OXYGEN COMPOUNDS
PHOTOLUMINESCENCE
PHOTON EMISSION
QUANTUM DOTS
RADIATIONS
RANDOMNESS
SILICATES
SILICON COMPOUNDS
SILICON OXIDES
SPECTROSCOPY
ULTRAVIOLET RADIATION
ZINC COMPOUNDS
ZINC OXIDES