کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5398378 | 1505882 | 2016 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Study on optical temperature sensing properties of YVO4:Er3+, Yb3+ nanocrystals
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
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 2H11/2 and 4S3/2 levels of Er3+. It shows that in a relatively wide range of sensing temperature (293-603Â 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 1.112Ã10â2Â Kâ1 was obtained for the sample with a particle size of 20Â 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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 179, November 2016, Pages 633-638
Journal: Journal of Luminescence - Volume 179, November 2016, Pages 633-638
نویسندگان
Qingyu Meng, Ting Liu, Jiaqi Dai, Wenjun Sun,