SUN Ying-fei, LYU Shu-chen, MENG Qing-yu etc. Luminescence and Optical Temperature Sensing Properties of NaY(MoO<sub>4</sub>)<sub>2</sub>:Er<sup>3+</sup> Nanocrystalline Phosphor[J]. Chinese Journal of Luminescence, 2017,38(12): 1582-1590
SUN Ying-fei, LYU Shu-chen, MENG Qing-yu etc. Luminescence and Optical Temperature Sensing Properties of NaY(MoO<sub>4</sub>)<sub>2</sub>:Er<sup>3+</sup> Nanocrystalline Phosphor[J]. Chinese Journal of Luminescence, 2017,38(12): 1582-1590 DOI: 10.3788/fgxb20173812.1582.
Luminescence and Optical Temperature Sensing Properties of NaY(MoO4)2:Er3+ Nanocrystalline Phosphor
phosphors derived at different calcination temperatures were prepared by molten salt method and the crystal structure and microscopic morphology were characterized by means of X-ray diffraction(XRD) and field emission scanning electron microscopy (FE-SEM). The Stokes fluorescence emission spectra of nanocrystals derived at different calcination temperatures have been measured. It can be found that the emission intensity ratio of
2
H
11/2
-
4
I
15/2
to
4
S
3/2
-
4
I
15/2
transitions from NaY(MoO
4
)
2
:Er
3+
increases with the decrease of the calcination temperature. Furthermore
the temperature sensing properties of NaY(MoO
4
)
2
:Er
3+
phosphors were studied based on the emission intensities from two thermally coupled
2
H
11/2
and
4
S
3/2
levels of Er
3+
. The results show that the temperature sensing sensitivity of the sample calcinated at 600℃ is somewhat higher than that of the sample calcinated at 900℃in a relatively wide range of sensing temperature (303-573 K). The sensing sensitivity increases with the decreasing of the calcination temperature
and a relative high sensitivity of 1.3610
-2
K
-1
is obtained for the sample calcinated at 600℃
which is about 76.6% higher than that of the sample obtained at 900℃. Finally
the physical mechanism for the calcination temperature-dependence of temperature sensing sensitivity was explained and predicted.
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Keywords
references
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