Synthesis and photoluminescence properties of Mn2+ doped ZnCN2 phosphors

Rohello, Erwan Leysour de; Bour, Francesco; Suffren, Yan; Merdrignac‐Conanec, Odile; Guillou, Olivier; Cheviré, François

doi:10.1016/j.oceram.2021.100157

Cited by 2 publications

(1 citation statement)

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“…Over the last decade, inorganic carbodiimide materials with the general formula M x (NCN) y (M = alkali, alkaline-earth, rare-earth or transition metals) have emerged as potential materials for lighting due to their remarkably high thermal and chemical properties [11][12][13][14][15][16][17][18][19][20]. More particularly, the emission properties of rare earth elements involving 5d-4f electronic transitions, i.e., Eu 2+ and Ce 3+ , were recently investigated in various carbodiimides hosts such as SrCN 2 :Eu 2+ (orange red) [14][15][16], BaCN 2 :Eu 2+ (red) [17] or Gd 2 (CN 2 ) 3 :Ce 3+ (yellow) [11] with activation capabilities in the near-UV-blue range.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2023

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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.

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