Journal
NANOSCALE
Volume 4, Issue 3, Pages 779-784Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1nr11365h
Keywords
-
Categories
Funding
- Fundamental Research Funds for the Central Universities [HIT.IBRSEM. 201103, DL09BB36]
Ask authors/readers for more resources
beta-NaGdF4 : Yb3+/Er3+ nanoparticles (NPs) codoped with Li+ ions were prepared for the first time via a thermal decomposition reaction of trifluoroacetates in oleylamine. The influence of site occupancy of Li+ on the upconversion emission of beta-NaGdF4 : Yb3+/Er3+ NPs was investigated in detail. The upconversion emission intensity was significantly enhanced by introducing different concentrations of Li+ ions. In contrast to lithium-free beta-NaGdF4 : Yb3+/Er3+, the green and red UC emission intensities of the NPs codoped with 7 mol% Li+ ions were enhanced by about 47 and 23 times, respectively. The luminescence enhancement should be attributed to the distortion of the local asymmetry around Er3+ ions. The mechanisms for the enhancement of upconversion emission were discussed. In addition, it was found in our research work that beta-NaGdF4 : Yb3+/Er3+ NPs exhibited paramagnetic features at room temperature and the magnetization was slightly increased by introducing Li+ ions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available