A Study of Synthesis of Cerium-Doped Yttrium Silicate and Yttrium Disilicate Phosphors by the Ammonia-Added Sol-Gel Method

Abstract

Pure-phase cerium-doped yttrium silicate and yttrium disilicate phosphors were successfully synthesized by the sol-gel method with added ammonia when the precursor was calcined at 1100°C and 1300°C for 1 h. The blue light was emitted when excited by the UV radiation of 325 nm wavelength. The luminescence of Y₂SiO₅:Ce1% phosphors was less than that of Y₂Si₂O₇:Ce1% in the same synthetic condition. Besides, their photoluminescence was strongly increased when Li, Na or K sensitizers were added. The X₁-Y₂SiO₅ and X₂-Y₂SiO₅ phosphors were irregular shapes and composed of agglomerates with the particle size of approximately 70 nm to 100 nm. [DOI: 10.1380/ejssnt.2012.248]