Journal
JOURNAL OF LUMINESCENCE
Volume 179, Issue -, Pages 633-638Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2016.07.002
Keywords
Nano-materials; Er3+; Up-conversion; Temperature sensing
Categories
Funding
- Foundation for Young Key Scholars of Higher Education Institution, Heilongjiang Province of China [1252G032]
- Natural Science Foundation of Heilongjiang Province of China [F201202]
Ask authors/readers for more resources
The YVO4: Er3+, Yb3+ phosphors with various particle sizes were prepared by a precipitation method and the crystal structure and microscopic image were characterized by means of X-ray Diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). The up-conversion luminescent spectra of Er3+, Yb3+ co-doped YVO4 nanocrystals with different particle sizes have been measured. It can be found that the red-green upconversion emission intensity ratio increases with the decrease of the particle size. Furthermore, the temperature sensing properties of YVO4: Er3+, Yb3+ phosphors with different particle sizes were studied based on the change of emission intensities from two thermally coupled H-2(11/2) and S-4(3/2) levels of Er3+, It shows that in a relatively wide range of sensing temperature (293-603 K), the temperature sensing sensitivity of nanosized materials is somewhat higher than that of bulk material. The sensing sensitivity of the sample increases with decreasing particle size, and a relative high sensitivity of 1.112 x 10(-2) K-1 was obtained for the sample with a particle size of 20 nm, which is about 17.3% higher than the bulk sample. Finally, physical mechanism for the size-dependence of temperature sensing sensitivity was explained and predicted. (C) 2016 Elsevier B.V. All rights reserved.
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