Abstract
Optical absorption and photoluminescence properties of Sn2+, Sb3+, and Te4+-doped zinc borate glasses are examined. The obtained ns2-type center-doped glasses prepared by non-quenching method using glassy carbon crucible show different absorption and photoluminescent (PL) properties compared with those prepared by a conventional rapid-quenched method. The optical absorption edges red-shift with increasing amount of ns2-type center. There is a linear relationship between the optical absorption edge and the PL excitation band among Sn2+, Sb3+, and Te4+ centers. Although these 5s2 emission centers possess the same electron configuration, Sn2+ center possessing the longest decay constant exhibits the highest intensity and quantum efficiency.
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