Low-temperature solution synthesis and characterization of Ce-doped YAG nanoparticles
来源期刊：Journal of Rare Earths2015年第6期
论文作者：吉成 冀立宇 连刘超 沈丽明 张晓艳 王一峰 Arunava Gupta
文章页码：591 - 598
摘 要：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.
吉成1，冀立宇1，连刘超1，沈丽明1，张晓艳1，王一峰1，Arunava Gupta2
1. State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology2. Centre for Materials for Information Technology, University of Alabama
摘 要：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.
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