Site occupancy and luminescence of Ce3+ ions in whitlockite-related strontium lutetium phosphate

Geng YQ; Shi QF; You FT; Ivanovskikh KV; Leonidov II; Huang P; Wang L; Tian Y; Huang Y; Cui CE

Materials Research Bulletin, Vol.116, 106-110, 2019

DOI10.1016/j.materresbull.2019.04.014 Export Citation

Site occupancy and luminescence of Ce3+ ions in whitlockite-related strontium lutetium phosphate

Geng YQ, Shi QF, You FT, Ivanovskikh KV, Leonidov II, Huang P, Wang L, Tian Y, Huang Y, Cui CE

Ce3+-doped Sr9Lu(PO4)(7) polycrystalline material has been synthesized using a solid state reaction at high temperature. Luminescence spectroscopic properties and emission decay kinetics have been studied upon UV-VUV excitation. Emission from Ce3+ ions located in two types of crystallographic sites has been identified in low-temperature spectra. Ce3+ ions have been shown to prefer occupying Sr2+ sites rather than Lu3+ sites. The temperature-dependent decay curves of Ce3+ 5d -> 4f emission demonstrate an excellent luminescence thermal stability.

Keywords:Whitlockites;Ce(3+)5d-4f emission;Crystallographic sites;UV-VUV spectroscopy;Decay curves