Luminescence properties of Ce3+ in orthosilicate oxyapatite NaY9(SiO4)6O2

Abstract Ce 3+ ‐doped orthosilicate oxyapatite NaY 9 (SiO 4 ) 6 O 2 phosphors NaY 9– x (SiO 4 ) 6 O 2 : x Ce 3+ were prepared by a conventional high‐temperature solid‐state reaction method, and their spectroscopic characteristics were systematically investigated. The occupancies of Ce 3+ ions at two different sites (Wyckoff 6 h and 4 f sites) in NaY 9 (SiO 4 ) 6 O 2 were determined. The influence of doping concentration on the emission intensity of Ce 3+ was investigated and the critical distance Rc was estimated in terms of the concentration quenching data.