Low-temperature solution synthesis and characterization of Ce-doped YAG nanoparticles

• 作 者: 吉成 冀立宇 连刘超 沈丽明 张晓艳 王一峰 Arunava Gupta
• 机 构: State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology,Ce
• 出 处: Journal of Rare Earths
• 发表日期: 2015年06期
• 关键词: calcination ammonium crystallinity ammonia tunable doping yttrium purity cerium

Monophasic Ce3+-doped yttrium aluminum garnet(Ce:YAG) nanoparticles with high crystallinity and tunable grain size ranging from ~19–30 nm were prepared by a modified co-precipitation process with a follow-up calcination treatment. For the synthesis, aluminum, yttrium, and cerium nitrates were used as starting materials, ammonium sulfate as dispersant, and a combination of ammonium bicarbonate and ammonia as precipitating agent. Influence of precipitation temperature, the pH value of precipitant solutions, aging period, calcination conditions, and Ce-doping level were investigated for controlling the purity, particle size, and photoluminescence performance of the Ce:YAG nanoparticles. High-purity YAG nanoparticles were prepared at pH =10.50–11.00 and calcination temperatures of 850–1100 ℃ with a calcination time of 3 h. With increasing Ce3+ concentration, the peak in the emission spectra of the obtained nanopowders shifted from 529 nm for the 0.67 wt.%-Ce:YAG to 544 nm for the 3.4 wt.%-Ce:YAG, while the strongest photoluminescence intensity was observed for the 1.3 wt.%-Ce:YAG nanoparticles.

Monophasic Ce3 + -doped yttrium aluminum garnet (Ce: YAG) nanoparticles with high crystallinity and tunable grain size ranging from ~ 19-30 nm were prepared by a modified co-precipitation process with a follow-up calcination treatment. For the synthesis, aluminum, Yttrium, and cerium nitrates were used as starting materials, ammonium sulfate as dispersant, and a combination of ammonium bicarbonate and ammonia as precipitating agent. Influence of precipitation temperature, the pH value of precipitant solutions, aging period, calcination conditions, and Ce-doping level were investigated for controlling the purity, particle size, and photoluminescence performance of the Ce: YAG nanoparticles. High-purity YAG nanoparticles were prepared at pH = 10.50-11.00 and calcination temperatures of 850-1100 ° C with a calcination time of 3 h. With increasing Ce3 + concentration, the peak in the emission spectra of the obtained nanopowders shifted from 529 nm for the 0.67 wt.% -Ce: YAG to 544 nm for the 3 .4 wt.% - Ce: YAG, while the strongest photoluminescence intensity was observed for the 1.3 wt.% - Ce: YAG nanoparticles.