Effect of Sb2O3 addition on photoluminescence properties of zinc phosphate and borate glasses

Trivalent cation oxides were added to zinc phosphate glasses by conventional melt-quenching technique to dope excess electrons in order to create donor electrons easily excited by the incident light, in specific Ga2O3 and Sb2O3. By exciting 200 and 250 am light, the glasses containing Sb2O3 emitted visible light, while no emission from those containing Ga2O3 could be observable. The intensity of emission light depended upon Sb2O3 concentration, and 0.3-1.0 mol % Sb2O3 addition was most effective for the emission, and concentration quenching was seen in over 5 mol % Sb2O3 addition. With respect to necessity of the presence of ZnO was explored by replacing ZnO by CaO and BaO. Even by changing of ZnO by CaO and BaO, the emission intensity was not influenced. Further, we used borate glasses instead of phosphate glasses. Since only weak emission was obtained from borate glasses, P2O5 can be considered to be indispensable for photoluminescence (PL) phenomena. (C) 2012 The Ceramic Society of Japan. All rights reserved.