Reisfeld, R and Patra, Amitava and Panczer, G and Gaft, M (1999) Spectroscopic properties of cerium in sol-gel glasses. Optical Materials , 13 (1). pp. 81-88. ISSN 0925-3467

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Abstract

Glasses containing Ce were prepared by the sol-gel method at elevated temperatures. Two parallel series, one in air and one in nitrogen atmosphere, were obtained. The main constituent of the glasses was silica SiO2 obtained by hydrolysis of ethoxysilane (TEOS). Spectroscopic properties of the glasses were studied by time-resolved and steady-state luminescence spectroscopy. In the present paper we made an effort to distinguish between the blue luminescence arising from Ce(III) and that obtained from the silica host which is connected with defects in the matrix. While the spectra of both pure silica and Ce activated silica excited at 337 nm or longer wavelength have the similar emission peaking between 400 and 450 nm, the emission of silica is broader and its decay time shorter than that of Ce(III). It seems that Ce quenches the luminescence of the silica centers. When excited at 308 nm by an excimer laser we detect short-lived emission of Ce(III) peaking between 350-380 nm which may be due to excitation to the conductivity band and subsequent recombination of the excited electrons with a hole. (C) 1999 Elsevier Science B.V. All rights reserved.

Item Type:	Article
Additional Information:	1st Spanish-Israeli Workshop on Solid State Lasers, EN GEDI, ISRAEL, DEC 14-16, 1997
Subjects:	Engineering Materials
Divisions:	Sol Gel
Depositing User:	Bidhan Chaudhuri
Date Deposited:	18 Jun 2012 07:48
Last Modified:	18 Jun 2012 07:48
URI:	http://cgcri.csircentral.net/id/eprint/1490

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