Alkaline-earth oxide network modifier on optical properties. of Ce3+-activated borogermanate glasses

摘要

Transparent and colorless CeO2-activated borogermanate glasses, with the nominal composition of 25B(2)O(3)-40GeO(2)-14Gd(2)O(3)-1CeO(2)-20MO (M = Ba, Sr, Ca and Mg), were synthesized by a melt-quenching method in air. Their optical properties including the transmittance, photoluminescence (excitation and emission spectra), the luminescence decay curves, 8 well as the temperature-dependent emission spectra were studied in detail. The room temperature photoluminescence spectra reveal that the emission intensity of the MgO glass is about two times stronger than that of the BaO glass. The blue shift of the cut-off edge, excitation and emission spectra of Ce3+-activated borogermanate glass were clearly observed in the order of BaO, SrO, CaO and MgO. And the emission intensity of Ce3+ ions as a function of temperature range in 325-475 K was also investigated. (C) 2015 Elsevier B.V. All rights reserved.