Synthesis of Cerium (III) and Terbium (III) Codoped Vaterite Phosphor Emitting by Black Light Irradiation and Its Fluorescence Property.

Abstract

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).