Energy transfer mechanism between Ce and Tb ions in sol-gel synthesized YSO crystals

CHIRIU, DANIELE;STAGI, LUIGI;CARBONARO, CARLO MARIA;CORPINO, RICCARDO;RICCI, PIER CARLO
2016

Abstract

The luminescence properties of Tb and Ce in Rare Earth Doped crystalline oxides largely depend on their relative concentrations: by increasing the dopant concentration, the luminescence profile changes from blue to green because of the energy transfer among centers. The kinetic properties of the luminescence of optically excited Terbium-Cerium co-doped Y2SiO5 sol-gel synthesized crystal powders have been investigated as a function of the Tb dopant concentration (Ce content fixed at 1% atomic). The interaction among different Tb emitting centers and their relation with Ce centers was explained within the Inokuti-Hirayama model for a dipole-dipole energy transfer mechanism in the low-middle Tb concentration range whilst the Forster-Dexter model was applied in the middle-high Tb concentration range. The kinetic model allows elucidating the role of sensitizer and activator ion as a function of Tb concentration, successfully estimating the energy transfer mechanism efficiency and calculating the critical Tb concentration.
Inglese
171
201
207
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Esperti anonimi
scientifica
Optical materials; Optical properties; Photoluminescence spectroscopy; Sol-gel growth; Materials Science (all); Condensed Matter Physics
no
Chiriu, Daniele; Stagi, Luigi; Carbonaro, CARLO MARIA; Corpino, Riccardo; Ricci, PIER CARLO
1.1 Articolo in rivista
info:eu-repo/semantics/article
1 Contributo su Rivista::1.1 Articolo in rivista
262
5
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