SPECTRAL ANALYSIS OF Tb3+ /Sm3+ ION DOPED IN TeO2 - B2O3 - ZnO - Na2O GLASS
Corresponding Author(s) : Tran Thi Hong
UED Journal of Social Sciences, Humanities and Education,
Vol. 7 No. 1 (2017): UED JOURNAL OF SOCIAL SCIENCES, HUMANITIES AND EDUCATION
The Tb3+/Sm3+ doped glass with its composition of TeO2 -B2O3 - ZnO - Na2O - RE2O3 (RE=Tb, Sm) has been synthesized via the melt quenching method; their luminescence properties are investigated through excitation and emission spectra. The photoluminescence spectrum of the Tb3+ ion singly doped glass shows a prominent green emission at 543nm (5D4→7F5) with an excitation of λexc=379nm (7F6→5G6). The photoluminescence spectrum of the Sm3+ doped glass reveals a bright red emission at 600nm (4G5/2→6H7/2) with an excitation of 401nm (6H5/2→4F7/2). The Tb3+/Sm3+ co-doped glass with an excitation of λexc=379nm exhibits an energy transfer from Tb3+ to Sm3+. This energy transfer process is explained by means of schemata showing energy levels.
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