Luminescence properties and energy transfer from Eu~(2+) to Tb~(3+) in Sr_5(PO_4)_3F phosphor

摘要

A series of single-phase Sr_5(PO_4)_3F: Eu~(2+), Tb~(3+), Na~+ phosphors have been synthesized by high temperature solid-state reaction. The photoluminescence excitation and emission spectra, concentration effect and energy transfer from Eu~(2+) to Tb~(3+) are investigated in detail. The work shows that there is an effective energy transfer from Eu~(2+) to Tb~(3+), where Eu~(2+) reveals an intense excitation band from 280 nm to 400 nm, matching well with the emission of n-UV chips, and Tb~(3+) emits an intense green emitting light.