Abstract
The luminescent borate glasses co-doped Tb3+/Eu3+ were successfully synthesized by conventional melting quenching technique. Under 378 nm UV-light excitation, the 542 nm emission intensity of Tb3+ weakened gradually and a shorter decay time was found with increasing the content of Eu3+ concentration, confirming the occurrence of Tb3+ to Eu3+ energy transfer. The luminescent color tunable from pure green to yellow and finally to orange was observed in the Tb3+/Eu3+ co-doped borate glasses. The fluorescence intensity ratio between the 542 nm of Tb3+: 5D4 → 7F5 transition and 702 nm of Eu3+: 5D0 → 7F4 transition in the luminescent glass was found to be highly temperature-dependent with a good sensitivity of 0.357 % K−1. Such Tb3+/Eu3+ co-doped borate glasses may present potential application in solid-state lighting and optical temperature sensors.
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