Synthesis, Luminescence and Energy Transfer Properties of Ce<sup>3+</sup>/Mn<sup>2+</sup> Co-Doped Calcium Carbodiimide Phosphors - Université de Rennes Accéder directement au contenu
Article Dans Une Revue Inorganics Année : 2023

Synthesis, Luminescence and Energy Transfer Properties of Ce3+/Mn2+ Co-Doped Calcium Carbodiimide Phosphors

Résumé

Ce3+-doped and Ce3+/Mn2+ co-doped calcium carbodiimide (CaCN2) phosphors were synthesized from doped calcium carbonate and carbon nitride by a solid-state reaction at 700 °C under flowing NH3 using a very short reaction time (1 h). The samples were characterized by powder X-ray diffraction, scanning electron microscopy and their diffuse reflectance and luminescence properties were investigated. Single-doped CaCN2:Ce3+ exhibits a blue emission under near-ultraviolet activation (386 nm) corresponding to the 5d1 → 2F5/2 and 5d1 → 2F7/2 transitions of Ce3+. Maximum emission is obtained at temperatures lower than 150 K and then progressively decreases up to 387 K, with an 80% drop in the emission at room temperature. Efficient energy transfers from Ce3+ to Mn2+ via a non-radiative dipole–dipole mechanism are evidenced for the co-doped samples, leading to various colored phosphors under near-ultraviolet activation (386 nm). The emission color of the obtained phosphors can be modulated from blue to red through a shade of white depending on the sensitizer/activator ratio.

Domaines

Chimie Matériaux
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Dates et versions

hal-04156360 , version 1 (10-07-2023)

Identifiants

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Erwan Leysour de Rohello, Yan Suffren, Francis Gouttefangeas, Odile Merdrignac-Conanec, Olivier Guillou, et al.. Synthesis, Luminescence and Energy Transfer Properties of Ce3+/Mn2+ Co-Doped Calcium Carbodiimide Phosphors. Inorganics, 2023, 11 (7), pp.691. ⟨10.3390/inorganics11070291⟩. ⟨hal-04156360⟩
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