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- W3010155745 endingPage "109445" @default.
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- W3010155745 abstract "In this paper, non-contact optical low temperature sensing behavior is explored between non-thermally coupled level of Ho3+ and the defect level of Zn2+ ion on doping in Yb3+:Y2Ti2O7 phosphor for the first time. The Ho3+/Zn2+ co-doped phosphor prepared by solid state reaction method demonstrates a temperature dependent behavior of emission intensity below the room temperature (25 °C). Under 450 nm (diode laser) excitation, the fluorescence at 552 nm (Green) and 754 nm (NIR) from Ho3+ ions and at 713 nm (NIR) from defect level of Zn2+ ions has been observed and studied at different temperatures in between 300K-100K. An enhancement in the emission intensity of defect band along with Ho3+ ions emission bands is observed on lowering the temperature. The ratio of emission intensity of peaks from Ho3+ level and defect level is considered for temperature sensing by polynomial fitting in FIR technique. The emission intensity of defect band increases with a larger rate than Ho3+ ions emission bands which increase the temperature sensor sensitivity. This paper opens a new field to use defect emission as a low temperature sensor. Thus, the present phosphor may be used as a low temperature sensing device." @default.
- W3010155745 created "2020-03-13" @default.
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- W3010155745 date "2020-07-01" @default.
- W3010155745 modified "2023-09-29" @default.
- W3010155745 title "Low temperature optical sensor based on non-thermally coupled level of Ho3+ and defect level of Zn2+ in Yb3+:Y2Ti2O7 phosphor" @default.
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- W3010155745 doi "https://doi.org/10.1016/j.jpcs.2020.109445" @default.
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