ブラックライト照射により発光するセリウム (III) 及びテルビウム (III) 共付活バテライト蛍光体の合成とその蛍光特性

抄録

This paper reports about synthesis and fluorescence properties of Ce (III) and Tb (III) codoped vaterite phosphor emitting by black light irradiation. Ce³⁺ and Tb³⁺ codoped vaterite was synthesized by a liquid phase reaction by adding 0.1mol·dm^-3 (NH₄)₂CO₃ solution into 0.10mol·dm^-3 CaCl₂ solution including CeCl₃ and TbCl₃ at 35°C. The formation ratio of vaterite included Tb³⁺ increased by adding glutamine. The emission wavelengths of the vaterite phosphor excited with 275nm light were 490, 545 and 580nm. However, the emission intensity of 545nm by codoping Ce³⁺ and Tb³⁺ into vaterite host increased by 50 times. Emission of Ce³⁺ and Tb³⁺ codoped vaterite phosphor observed at about 545nm and the emitted color was green. The largest emission was observed in the vaterite phosphor prepared by synthetic conditions with a (Ce+Tb)/Ca atomic ratio 0.04 (Ce/Ca atomic ratio: 0.02, Tb/Ca atomic ratio 0.02).