Orange luminescence of Eu3+-doped CuLaO2 delafossite oxide

Abstract

CuLa1-xEuxO2 polycrystalline specimens were successfully prepared by the solid-state reaction method. X-ray diffraction measurement revealed that CuLa1-xEuxO2 (0.01≤x≤0.2) was a single phase with the delafossite structure with successful substitution of Eu3+ into the La3+ site at the center of the LaO6 octahedron. Orange luminescence due to 5D0-7F0,1 transitions was observed in photoluminescence spectra of CuLa1-xEuxO2, although Eu3+-containing materials usual show red luminescence due to the 5D0-7F2 transition. This luminescent color difference suggests that rare earth ion doping into a delafossite-type oxide is promising for constructing new color-luminescent materials. © 2010 The Ceramic Society of Japan.