The optical spectroscopy and excited state dynamics of the 5D3 and 5D4 levels of Tb3+ and 5D0 level of Eu3+ have been studied in double phosphate materials having the eulytite disordered cubic structure. In the case of Sr3Tb0.90Eu0.10(PO4)3, Tb3+ → Eu3+energytransfer is observed upon excitation in the Tb3+energy levels located in the UV region. This transfer gives rise to strong emission from the 5D0 level of Eu3+, peaking in the red spectral region at 612 nm. The energytransfer efficiency from the 5D4 level of Tb3+ in Sr3Tb0.90Eu0.10(PO4)3 has been evaluated and the luminescence quantum yields of Sr3Tb(PO4)3 and Sr3Tb0.90Eu0.10(PO4)3 have been measured.
Energy transfer processes in Sr3Tb0.90Eu0.10(PO4)3
BETTINELLI, Marco Giovanni;SPEGHINI, Adolfo;PICCINELLI, FABIO;
2010-01-01
Abstract
The optical spectroscopy and excited state dynamics of the 5D3 and 5D4 levels of Tb3+ and 5D0 level of Eu3+ have been studied in double phosphate materials having the eulytite disordered cubic structure. In the case of Sr3Tb0.90Eu0.10(PO4)3, Tb3+ → Eu3+energytransfer is observed upon excitation in the Tb3+energy levels located in the UV region. This transfer gives rise to strong emission from the 5D0 level of Eu3+, peaking in the red spectral region at 612 nm. The energytransfer efficiency from the 5D4 level of Tb3+ in Sr3Tb0.90Eu0.10(PO4)3 has been evaluated and the luminescence quantum yields of Sr3Tb(PO4)3 and Sr3Tb0.90Eu0.10(PO4)3 have been measured.
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