期刊
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
卷 11, 期 11, 页码 9631-9635出版社
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2011.5312
关键词
Y2O3@YOF; Core-Shell; Luminescent Enhancement; Charge Transfer
类别
资金
- NSFC (National Natural Science Foundation of China) [51002041, 50972021, 11104023, 11104024, 61078061]
- Natural Science Foundation of Liaoning Province [20092147]
- Foundation of Education Department of Liaoning Province [L2010056]
- Fundamental Research Funds for the Central Universities [2011QN152, 2011ZD032-033, 2011JC037, 017004]
In this paper, a two-step synthesis method for preparing Eu3+ ion-doped Y2O3@YOF core-shell nanocrystals is introduced. Eu3+ ion-doped Y2O3@YOF core-shell nanocrystals were prepared by combining an autocombustion process with a low temperature solid state reaction. X-ray powder diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), photoluminescence (PL) and fluorescence decay were employed to characterize the prepared samples. The results of XRD, TEM and EDS indicated that the products prepared by this method were not a mixture of Y2O3:Eu3+ and YOF:Eu3+ nanocrystals, but Eu3+ ion-doped Y2O3@YOF core-shell nanocrystals. Compared with Y2O3:Eu3+ nanocrystals, a 20% increment in luminescence intensity was observed in the Eu3+ ion-doped Y2O3@YOF core-shell nanocrystals, thus suggesting that coating with a YOF:Eu3+-shell can efficiently block the nonradiative relaxation channels that are induced by surface defect states.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据