Synthesis and photoluminescence properties of Mn<sup>2+</sup> doped Ca<sub>1-x</sub>Sr<sub>x</sub>CN<sub>2</sub> phosphors prepared by a carbon nitride based route - Université de Rennes Accéder directement au contenu
Article Dans Une Revue Journal of Solid State Chemistry Année : 2021

Synthesis and photoluminescence properties of Mn2+ doped Ca1-xSrxCN2 phosphors prepared by a carbon nitride based route

Résumé

Mn2+ doped Ca1-xSrxCN2 phosphors were synthesized by a solid-state reaction in only 1h under NH3 atmosphere at 700 °C from doped calcium carbonate and carbon nitride as precursors. The samples were characterized by powder X-ray diffraction, scanning electron microscopy and their diffuse reflectance and luminescence properties were investigated in order to evaluate the potential of such systems as red phosphors. All pure and well-crystallized Mn2+ doped samples exhibit broad red emission around 680 nm when excited at 270 nm at room temperature corresponding to the 4T1g (4G) → 6A1g (6S) transition. Maximum emission in CaCN2:Mn is obtained for Mn2+ content of 4%mol and is stable up to 343 K and then shows a 20% decrease at 393 K. Finally, the progressive substitution of Sr2+ for Ca2+ evidences a solid solution domain between CaCN2 and β-SrCN2 with continuous increase of the crystal lattice dimensions. However, such substitution has no impact on the wavelength emission but leads to a decrease of the luminescence efficiency of the phosphor.
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Dates et versions

hal-03213306 , version 1 (06-05-2021)

Identifiants

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Erwan Leysour de Rohello, Yan Suffren, Odile Merdrignac-Conanec, Olivier Guillou, C. Calers, et al.. Synthesis and photoluminescence properties of Mn2+ doped Ca1-xSrxCN2 phosphors prepared by a carbon nitride based route. Journal of Solid State Chemistry, 2021, 300, pp.122240. ⟨10.1016/j.jssc.2021.122240⟩. ⟨hal-03213306⟩
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