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High-Sensitivity Optical Thermometry in CdF2:Tm3+ /Yb3+ Single Crystals Based on Multi-Band Upconversion Fluorescence Intensity Ratios
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DOI：10.1016/j.jlumin.2026.122016.png)
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Abstract
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• Upconversion emission of Tm3+/Yb3+ ions investigated in CdF2 single crystals. • Multi-band fluorescence intensity ratios enable ratiometric thermometry. • Maximum relative sensitivity of 2.14 % K-1 is obtained. • High temperature resolution of 0.20 K is achieved. • CdF2 proves a promising host for luminescent temperature sensing.
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3.6
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