Abstract
The Tm3+/Tb3+/Sm3+ doped 60TeO2·40ZnO glass were prepared and white light generation under 355 nm excitation were investigated. The glass samples were produced adjusting the ions concentrations in order to achieve the red-green-blue relative intensity ratios pursuing white light emission. The overall emission light chromaticity coordinates sweeped out the CIE-1931 color diagram. In addition, the emission spectra showed a decrease in Tm3+ emission intensity when Tb3+ and Sm3+ was added to the glass samples, suggesting energy transfer mechanisms. The decay lifetime data revealed the occurrence of a non-radiative energy transfer process from Tm3+ for both Tb3+ and Sm3+ ions. Accordingly, the results herein reported suggest that the 60TeO2·40ZnO glasses are viable as hosts for W-LED and SSL applications.
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