Preparation and fluorescence properties of color tunable phosphors Ca3Y2(Si3O9)2:Dy3+

Abstract

A novel reddish-orange phosphor, Ca₃Y_2−2x(Si₃O₉)₂:2xDy³⁺, was synthesized via conventional solid-state reaction. Its photoluminescence properties were investigated. With increasing Dy³⁺ concentration, the luminescence intensity first increases, reaches the greatest, and then decreases. The concentration quenching mechanism is based on the electric dipole–dipole interaction. The decay times were also determined.