Synthesis of Gd[sub 1−x]Eu[sub x]Al[sub 3](BO[sub 3])[sub 4] (0

Single phase europium-activated gadolinium aluminum borate, was obtained by the evaporation of its nitrate solution, and calcination at 900 to 1100°C in air. All the solid solution was identified as the isomorphs of huntite. activated showed intense red emission with CIE chromaticity coordinates of (0.645, 0.330) under 147 nm excitation. According to the excitation and emission spectra, the red emission of was decreased under excitation of the vacuum ultraviolet (VUV) region (158-160 nm), and increased under excitation UV region (258-260 nm) with the increase of concentration. In comparison with the absorption data of borates, the 158 nm excitation peak was assigned to the energy level of groups. In excitation spectra, the sharp 274 nm peak, corresponding to the transition of in addition to the f-f transitions of were observed. Consequently, the emission of was induced by the energy transfer of VUV excitation to the activator ions via the co-activator in © 2001 The Electrochemical Society. All rights reserved.