Title

Specific absorption spectra of cerium in multicomponent silicate glasses

Authors

Authors

M. L. Brandily-Anne; J. Lumeau; L. Glebova;L. B. Glebov

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

J. Non-Cryst. Solids

Keywords

Optical glass; Cerium ions; Spectroscopy; Photoionization; NA2O-CAO-MGO-SIO2 GLASSES; WATER; IRON; Materials Science, Ceramics; Materials Science, Multidisciplinary

Abstract

Photoionization of glass requires photon energies larger than the bandgap of the glass matrix. To shift the photosensitivity of a glass to longer wavelengths, it is common to add a sensitizer, e.g. cerium. Cerium has two valence states but only the Ce(3+) is UV-photoactive. Hence, we present a spectral method that allows determining specific absorption spectra of both valent states of cerium in two different silicate glasses. Two overlapped absorption spectra, one for Ce(3+) and one for Ce(4+), were observed in soda lime silicate glass. It was found that both spectra consist from two Gaussian bands. Specific absorption of each ion was calculated on the basis of balance equations written for glasses melted under different redox conditions and used to estimate the absolute concentration of each ion. An identical analysis was performed on a photosensitive multicomponent silicate glass (photo-thermo-refractive (PTR) glass). It was found that absorption band of Ce(3+) in PTR glass is shifted to short wavelength region due to the presence of fluorine while absorption spectra of Ce(4+) are identical. The effect of UV-exposure on absorption spectra of cerium was studied. An absorption spectrum of photo-ionized Ce(3+) is not identical to that of Ce(4+): UV-exposure induces a new band resulting from Ce(3++) and electron color centers. (C) 2010 Elsevier B.V. All rights reserved.

Journal Title

Journal of Non-Crystalline Solids

Volume

356

Issue/Number

44-49

Publication Date

1-1-2010

Document Type

Article; Proceedings Paper

Language

English

First Page

2337

Last Page

2343

WOS Identifier

WOS:000285282100011

ISSN

0022-3093

Share

COinS