Intense visible fluorescence and energy transfer in Dy3+, Tb3+, Sm3+ and Eu3+ doped rare-earth borate glasses

Abstract Tb 3+ /Dy 3+ and Eu 3+ /Sm 3+ doped rare-earth borate glasses have been synthesized and characterized. Under UV excitation, Dy 3+ , Tb 3+ , Sm 3+ and Eu 3+ emit intense yellowish white, green, reddish orange and red lights, respectively. In Tb 3+ /Dy 3+ co-doped glasses, the enhancement of Tb 3+ green emission is observed, and the sensitization is related to the efficient energy transfer from Dy 3+ to Tb 3+ . In Eu 3+ /Sm 3+ co-doped glasses, the excitation wavelength range of Eu 3+ emission is broadened owing to the energy transfer from Sm 3+ to Eu 3+ . This broadening makes the Ar + 488 nm wavelength laser a powerful excitation source for Eu 3+ fluorescence. The rare-earth doped glasses with various visible emissions are useful for developing new color light sources, fluorescent display devices, UV-sensor and tunable visible lasers.

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