Preparation and upconversion luminescence of monodisperse Y2O2S:Yb/ Ho-silica/aminosilane core-shell nanoparticles
来源期刊：Journal of Rare Earths2010年第4期
论文作者：庞涛 曹望和 邢明铭 冯威 徐书婧 罗昔贤
文章页码：509 - 512
摘 要：Y2O2S:Yb/Ho-silica/aminosilane core-shell nanoparticles were prepared by a solid-gas method in combination with polyvinylpyr-rolidone assisted one-step ammoniating method. The core was a single Y2O2S:Yb/Ho with 80 nm in diameter and the shell was silica/aminosilane with around 5 nm in thickness. The results of sedimentation experiment indicated that the nanoparticles could be well-dispersed in ethanol and water to form stable colloids. Since the coating weakened lattice vibration energies of the Y2O2S:Yb/Ho particles, the proportion of upconversion processes in the depletion of Ho3+ 5I6 level were increased, resulting in increase of green light and decrease of red light.
庞涛，曹望和，邢明铭，冯威，徐书婧，罗昔贤
Optoelectronic Technology Institute, Dalian Maritime University
摘 要：Y2O2S:Yb/Ho-silica/aminosilane core-shell nanoparticles were prepared by a solid-gas method in combination with polyvinylpyr-rolidone assisted one-step ammoniating method. The core was a single Y2O2S:Yb/Ho with 80 nm in diameter and the shell was silica/aminosilane with around 5 nm in thickness. The results of sedimentation experiment indicated that the nanoparticles could be well-dispersed in ethanol and water to form stable colloids. Since the coating weakened lattice vibration energies of the Y2O2S:Yb/Ho particles, the proportion of upconversion processes in the depletion of Ho3+ 5I6 level were increased, resulting in increase of green light and decrease of red light.
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