An effective way to enhance upconversion emission and temperature sensing via Zn2+ incorporation in Er3+-Yb3+:YMoO4 nanophosphors

[Display omitted] •Emission intensity of green band rises ∼322 times via incorporating Zn2+ ions.•Sensitivity ∼7.85×10−3K−1 at 300K temperature have been achieved.•Greater electronegativity of Zn2+ ions occur breakdown in the crystal symmetry. Frequency upconversion (UC) emission in the Er3+/Yb3+/Zn...

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Published in:Journal of industrial and engineering chemistry (Seoul, Korea) 2018, 60(0), , pp.125-132
Main Authors: Mondal, Manisha, Rai, Vineet Kumar
Format: Article
Language:English
Subjects:
Nanophosphors
TEM
Temperature sensing
Upconversion
화학공학
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description [Display omitted] •Emission intensity of green band rises ∼322 times via incorporating Zn2+ ions.•Sensitivity ∼7.85×10−3K−1 at 300K temperature have been achieved.•Greater electronegativity of Zn2+ ions occur breakdown in the crystal symmetry. Frequency upconversion (UC) emission in the Er3+/Yb3+/Zn2+:YMoO4 nanophosphors synthesized via chemical coprecipitation method has been reported under 980nm diode laser excitation. The intensity ratio of two closely spaced green UC emission transitions peaking at ∼531nm and ∼552nm at different temperatures has been monitored. UC emission intensity and temperature sensing capability of Er3+-Yb3+:YMoO4 nanophosphors have been greatly enhanced via Zn2+ ions incorporation and explained in terms of electronegativity, breakdown in crystal field symmetry and increase in transition probability. The sensitivity, energy transfer efficiency and population redistribution ability have also been determined.
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Frequency upconversion (UC) emission in the Er3+/Yb3+/Zn2+:YMoO4 nanophosphors synthesized via chemical coprecipitation method has been reported under 980nm diode laser excitation. The intensity ratio of two closely spaced green UC emission transitions peaking at ∼531nm and ∼552nm at different temperatures has been monitored. UC emission intensity and temperature sensing capability of Er3+-Yb3+:YMoO4 nanophosphors have been greatly enhanced via Zn2+ ions incorporation and explained in terms of electronegativity, breakdown in crystal field symmetry and increase in transition probability. 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Frequency upconversion (UC) emission in the Er3+/Yb3+/Zn2+:YMoO4 nanophosphors synthesized via chemical coprecipitation method has been reported under 980nm diode laser excitation. The intensity ratio of two closely spaced green UC emission transitions peaking at ∼531nm and ∼552nm at different temperatures has been monitored. UC emission intensity and temperature sensing capability of Er3+-Yb3+:YMoO4 nanophosphors have been greatly enhanced via Zn2+ ions incorporation and explained in terms of electronegativity, breakdown in crystal field symmetry and increase in transition probability. 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subjects Nanophosphors
TEM
Temperature sensing
Upconversion
화학공학
title An effective way to enhance upconversion emission and temperature sensing via Zn2+ incorporation in Er3+-Yb3+:YMoO4 nanophosphors
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