In situ synthesis of highly crystalline Tb-doped YAG nanophosphor using the mesopores of silica monolith as template - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Materials Chemistry C Année : 2015

In situ synthesis of highly crystalline Tb-doped YAG nanophosphor using the mesopores of silica monolith as template

Résumé

This report describes the first synthesis of a highly crystalline YAG:Tb nanophosphor inside the pores of a mesoporous silica monolith (MSM). A simple wet impregnation procedure using a YAG:Tb sol and a MSM platform prepared by a sol–gel method was adopted to prepare highly homogeneous MSM–YAG:Tb luminescent composites. The morphological, structural and luminescence properties of in situ generated YAG:Tb nanocrystals, investigated using XRD, TEM, HRTEM, EDS, FTIR, nitrogen gas sorption and photoluminescence measurements, were compared to those of the bulk YAG:Tb phosphor. The specific surface area and the pore volume of the MSM host material were found to be lower when YAG:Tb nanoparticles were grown in the pores of the MSM material. The particle diameter of the nano-sized YAG:Tb phosphor was estimated to be about 23 nm. The MSM–YAG:Tb composite exhibited a strong green fluorescence emission with the characteristic main emission band of Tb3+ located at 548 nm. The prepared composite also showed a shorter photoluminescence (PL) lifetime and excitation bands shifted to lower wavelengths compared to the neat YAG:Tb phosphor. The as-prepared MSM–YAG:Tb material could be integrated into optoelectronic devices and holds good potential to be applied in decorative lighting
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Dates et versions

hal-01146369 , version 1 (01-12-2015)

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Aboulaich Abdelhay, Nathalie Caperaa, Hicham El Hamzaoui, Bruno Capoen, Audrey Potdevin, et al.. In situ synthesis of highly crystalline Tb-doped YAG nanophosphor using the mesopores of silica monolith as template. Journal of Materials Chemistry C, 2015, 3 (19), pp.5041-5049. ⟨10.1039/C5TC00587F⟩. ⟨hal-01146369⟩
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