Synthesis and luminescent properties of Ca8MgY(PO4)7: Re3+(Re3+=Eu3+, Ce3+, Tb3+) phosphors

Document Type

Article

Publication Date

1-1-2014

Abstract

β-Ca3(PO4)2 structured Ca8MgY(PO4)7: Re3+(Re3+=Eu3+, Ce3+, Tb3+) has been prepared by solid state method. The results of XRD, FT-IR, and TG-DSC characterization indicated that the optimum synthesis temperature was at 1 200°C. PL characterization indicated that under 252 nm ultraviolet irradiation, Ca8MgY(PO4)7:Eu3+ phosphor showed the characteristic emission of Eu3+, dominated by the emission at 612 nm, which was ascribed to 5D0-7F2 transition of Eu3+, the optimum doping concentration of Eu3+ was 5.0mol%. Under 295 nm ultraviolet irradiation, Ca8MgY(PO4)7:Ce3+ phosphor showed a band emission with maximum at 363 nm, which was originated from 5d1-4f1 transition of Ce3+, the optimum doping concentration of Ce3+ was 1.0mol%.Under the irradiation of ultraviolet at 228 nm, the emission of Ca8MgY(PO4)7: Tb3+ was dominated by blue emission ascribed to 5D3-7FJ at lower doping concentration, while at higher concentration, the emission was dominated by green emission ascribed to 5D4-7FJ. This phenomenon was due to the crossing-relaxation of Tb3+. The optimum doping concentration of Tb3+ was 7.0mol%.

Publication Source (Journal or Book title)

Gongneng Cailiao/Journal of Functional Materials

First Page

12097

Last Page

12101

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