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Abstract
The photoluminescence properties of lithium borate glasses doped with Tb3+ and Eu3+ ions individually and together were explored. The combination of bright green and orange-red emissions from the optimized glasses can generate white light under ultraviolet excitation. The red emission of Eu3+ ions was remarkably improved by external doping with Tb3+ ions by means of energy transmission from Tb3+ to Eu3+. The correlated color temperature and chromaticity coordinates were significantly changed from warm reddish to cool white region in Eu3+ and (Tb3++Eu3+):lithium borate glassy matrices, respectively, which were found to be a good candidates for white light emitting device applications.
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