The photoluminescence of Ce3+ and Tb3+ ions in zinc metaphosphate glasses is investigated. The blue and green emissions of Tb3+ ions are enhanced upon UV excitation through energy transfer from Ce3+ to Tb3+ ions. The efficiency of such an energy transfer was estimated based on spectroscopic data and resulted in being about 20-23%. Spectroscopic data revealed that the energy transfer occurs via a non-radiative process inside Ce3+-Tb3+ clusters formed in the glass. This ion clustering could be useful for the design of efficient conversion phosphors of ultraviolet to blue and green light.
Optical spectroscopy of zinc metaphosphate glasses activated by Ce3+ and Tb3+ ions
SPEGHINI, Adolfo;BETTINELLI, Marco Giovanni
2006-01-01
Abstract
The photoluminescence of Ce3+ and Tb3+ ions in zinc metaphosphate glasses is investigated. The blue and green emissions of Tb3+ ions are enhanced upon UV excitation through energy transfer from Ce3+ to Tb3+ ions. The efficiency of such an energy transfer was estimated based on spectroscopic data and resulted in being about 20-23%. Spectroscopic data revealed that the energy transfer occurs via a non-radiative process inside Ce3+-Tb3+ clusters formed in the glass. This ion clustering could be useful for the design of efficient conversion phosphors of ultraviolet to blue and green light.
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