首页|Tm3+,Yb3+: Y2SiO5 up-conversion phosphors: Exploration of temperature sensing performance by monitoring the luminescence emission
Tm3+,Yb3+: Y2SiO5 up-conversion phosphors: Exploration of temperature sensing performance by monitoring the luminescence emission
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NSTL
Elsevier
Tm3+,Yb3+:Y2SiO5 ceramic powders synthesized via combustion route exhibited up-conversion (UC) fluorescence when were submitted to CW-laser radiation at 980 nm. Four emission bands at 478 nm, 650 nm 690 nm and 798 nm, corresponding to transitions (1)G(4)-> H-3(6), (1)G(4)-> F-3(4), F-3(2,3) -> H-3(6) and H-3(4)-> H-3(6) were observed. The properties of the UC emission bands are influenced by temperature. Thermal coupling levels (TCL) cause a noticeable change in the relative intensities between the excited states F-3(2,3) -> H-3(6) and H-3(4)-> H-3(6) in the temperature range of 298-473 K. The maximum absolute sensitivity (1.25 x 10(-3) K-1, 473 K) and relative sensitivity (1.83% K-1, 298 K) were obtained using the fluorescence intensity ratio (FIR) technique. Thermal sensing performance has been explored by utilizing the FIR technique between non-thermally coupled levels (NTCL). Through the calculation of FIR of NTCL (1)G(4)-> H-3(6) and H-3(4)-> H-3(6), the value of the relative sensitivity was acquired (1.5% K-1, 298 K). The comparison of TCL and NTCL FIR-method performances shows that this ceramic powder has the potential to be used as a ratiometric thermal sensor for remote temperature measurements.
NSTL
Elsevier
