Color-tunable Eu²⁺ activated oxysilicate phosphors with oxyapatite structure

Shuanglong Yuan (1) , Luting Wang (1) , Zhaofeng Cui (1) , Yunxia Yang (1) , Huidan Zeng (1) , François Cheviré (2) , Franck Tessier (2) , Guorong Chen (1)

1 Key Laboratory for Ultrafine Materials
2 ISCR - Institut des Sciences Chimiques de Rennes

Color-tunable Eu²⁺ activated oxysilicate phosphors with a general formula M_3.85La₆(SiO₄)₆O:Eu²⁺_0.15 (M = Mg, Ca, Sr, Ba) were synthesized for the first time by solid-state reaction at high temperature under reducing atmosphere. The influence of alkaline earth metal ions on the crystal structure and photoluminescence characteristics have been investigated by the measurement of XRD and photoluminescence characteristics. The results have indicated that all the phosphors were oxyapatite structure belonging to P63/m space group and cell parameters increase in order of Mg < Ca < Sr < Ba. According to the photoluminescence spectra, the peak wavelength and FWHM of emission bands have been changed by varying M ions in the host lattices, result in the emission color have been changed. The detailed explanations have been well suggested by crystal structure and covalent effect.

Mots clés: Phosphor; Oxysilicates; Oxyapatite Structure; Color-Tunable

Domaines: Matériaux; Chimie

Shuanglong Yuan, Luting Wang, Zhaofeng Cui, Yunxia Yang, Huidan Zeng, et al.. Color-tunable Eu²⁺ activated oxysilicate phosphors with oxyapatite structure. Journal of Materials Sciences and Applications, 2015, 1 (2), pp.33-37. ⟨hal-01201718⟩