Tran Ngoc, Phan Thi Hoai Thuong, Hoang Sy Tai

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Abstract: Spectroscopic properties of Tb3+ and Sm3+ ions co-doped in alkali aluminoborate glasses (70-x-y)B2O3.28Li2O.2Al2O3.xSm2O3.yTb2O3 (ABL:Tb, Sm) fabricated by melting method have been studied. The emission intensity of Tb3+ or Sm3+ in ABL:Tb or ABL:Sm glasses is influenced by the Tb3+ or Sm3+doping concerning with the 0.75 mol% and 1.0 mol% optimum concentrations, respectively. The concentration quenching effect of Tb3+ or Sm3+ in ABL:Tb, Sm glasses is observed. The mechanism of this phenomenon is attributed to the f-f interaction for either Tb3+/Sm3. The ABL:Tb, Sm glasses can produce color emission from green to red by properly tuning the relative ratio between Tb3+ and Sm3+. The emission intensity of Tb3+/Sm3+ in ABL:Tb, Sm glasses can be enhanced by the energy transfer from Tb3+/Tb3+ and Sm3+/Sm3+. The results indicate that ABL:Tb, Sm may be a promising double emission for white light emitting diodes.

Keywords:Sm3+and Tb3+ ions; alkali aluminoborate glass, the concentration quenching mechanism.

Keywords: Sm3 and Tb3 ions; alkali aluminoborate glass, the concentration quenching mechanism


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