OPTICAL PROPERTIES OF HEAVY METAL GLASS DOPED WITH TB/EU IONS
Corresponding Author(s) : Tran Thi Hong
UED Journal of Social Sciences, Humanities and Education,
Vol. 5 No. 3 (2015): UED JOURNAL OF SOCIAL SCIENCES, HUMANITIES AND EDUCATION
The Tb3+/Eu3+ doped glass with the composition of TeO2 –B2O3 - ZnO – Na2O – RE2O3 (RE=Tb, Eu) is a product resulting from the melt quenching method; the luminescence properties of the glass samples have been examined via excitation and emission spectra. The photoluminescence spectrum of the glass doped singly with Tb3+ ion when being excited at λexc=379 nm (7F6→5G6) showed a prominent green emission at 543 nm (5D4→7F5). The photoluminescence spectrum of the Eu3+ doped glass with an excitation at 394 nm (7F0→5L6) revealed a bright red emission at 612 nm (5D0→7F2). The glass sample containing Tb3+(1 mol%) co-doped with Eu3+ (1mol%) at an excitation of λexc=379 nm exhibited an energy transfer from Tb3+ to Eu3+ ions. This energy transfer process can be explained by means of a diagram showing energy levels.
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