Defect-Induced Photoluminescence of Powdered Silica Glass

Abstract:

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Visible photoluminescence was generated in standard soda-lime-silica glass powder, mechanically milled in a high-energy attrition mill. The broad emission band maximum shows a linear dependence on the exciting wavelength, suggesting the possibility to tune the PL emission. The photoluminescence was attributed to defect generation related to unsatisfied chemical bonds due to the high surface area. Raman scattering and ultraviolet-visible optical reflectance measurements corroborate this assertion. Transmission electron microscopy measurements indicate that the powder is composed by nanocrystallites with about 10-20 nanometers immersed in an amorphous media.

Info:

Periodical:

Defect and Diffusion Forum (Volumes 273-276)

Edited by:

Andreas Öchsner and Graeme E. Murch

Pages:

479-484

DOI:

10.4028/www.scientific.net/DDF.273-276.479

Citation:

P. S. Pizani et al., "Defect-Induced Photoluminescence of Powdered Silica Glass", Defect and Diffusion Forum, Vols. 273-276, pp. 479-484, 2008

Online since:

February 2008

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Price:

$35.00

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