Article Dans Une Revue Journal of Luminescence Année : 2025

Energy transfer phenomena in Er3+, Yb3+, Tm3+ tri-doped lanthanum oxysulfide phosphors

Résumé

Lanthanum oxysulfide (La2O2S) was investigated as an effective doping matrix for the development of Er3+, Yb3+, Tm3+ tri-doped phosphors emitting white light. The powders were prepared by combustion synthesis and subsequently post-sulfurized under H2S/N2 . They were characterized using Powder X-Ray Diffraction, Fourier-Transform Infrared Spectroscopy, Scanning Electron Microscopy and thermogravimetric analysis to assess their purity, morphology and thermal stability. The excitation, down-conversion and up-conversion properties of the phosphors were then studied using UV/Visible/NIR and fluorescence spectroscopy. Although white emission was not achieved with the studied compositions, a mechanism for up-conversion energy transfer in the tri-doped samples is proposed.

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hal-05043977 , version 1 (23-04-2025)

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Alexandre Le Coz, Louis Cornet, Guillaume Durand, Romane Henry-Bauer, Manon Even, et al.. Energy transfer phenomena in Er3+, Yb3+, Tm3+ tri-doped lanthanum oxysulfide phosphors. Journal of Luminescence, 2025, 281, ⟨10.1016/j.jlumin.2025.121195⟩. ⟨hal-05043977⟩
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