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.

Concentration and Cyrstalline Phase Effects on the Spectroscopic Properties of Sol-Gel Synthesized Er³⁺:Y₂Si₂O₇ Nanopowders

“…Although, various rare earth-activated yttrium orthosilicates have been studied a lot [17][18][19][20][21][22][23][24][25][26][27][28] [25].…”

“…Rare earth elements (RE) doped, co-doped and tridoped Y2Si2O7 are crucial nanophosphors for lasers, light emitting diodes (LED), white LED and plasma display panel applications [13][14][15][16]. Although, various rare earth-activated yttrium orthosilicates have been studied a lot [17][18][19][20][21][22][23][24][25][26][27][28], there have been a few studies reported on the Er 3+ : Y2Si2O7. Diaz et al analyzed the luminescence properties of Y2Si2O7 : Dy phosphors prepared by a new pressureless hydrothermal route.…”

“…Thanh et al studied the structure of Y2Si2O7 : Ce phosphors prepared by the sol-gel method with added ammonia. The blue light was emitted when excited by the 325 nm UV radiation [23].…”