Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8018190 | Materials Letters | 2015 | 4 Pages |
Abstract
In this paper, we reported a type of highly luminescent YVO4:Eu3+@YVO4 core-shell nanoparticles (NPs) obtained by a surface-confined thermal diffusion method. YVO4:Eu3+ particle cores with a doping ratio of 50% were firstly synthesized, followed by the regrowth of pure YVO4 shells. Thereafter, the raw YVO4:Eu3+@YVO4 core-shell NPs were embedded into a silica xerogel, which underwent annealing at 800 °C for different times. Thanks to the protection of silica matrix and thermal diffusion of Eu3+, the as-obtained optimal NPs maintained the initial small size (19 nm), but exhibited considerably improved luminescent properties: the intensity was enhanced by 13 times and absolute quantum yield raised up to 14.4%. Such a good performance was interpreted by the corporation of three factors, i.e. improved crystallization, decreased concentration quenching and absent surface quenching.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Dini Xie, Hongshang Peng, Shihua Huang, Fangtian You, Xiqing Zhang, Gang Wang,