研究目的
Investigating the tunable upconversion luminescence and optical temperature sensing based on non-thermal coupled levels of Lu3NbO7:Yb3t/Ho3t phosphors.
研究成果
The Lu3NbO7:Yb3t/Ho3t phosphors exhibit tunable UC luminescence and effective optical temperature sensing based on NTCL, with potential applications in upconverters, color tunable devices, and optical temperature sensors. The maximum absolute sensitivity was found to be 0.94%K?1 at 298 K.
研究不足
The study is limited by the synthesis method and the specific temperature range (293–573 K) for optical temperature sensing. The sensitivity and accuracy of temperature sensing may be affected by the phosphor's composition and the excitation conditions.
1：Experimental Design and Method Selection:
The phosphors were synthesized by the solid-state method. UC luminescence properties were discussed by change of pump power and ion concentration as well as the measured temperature.
2：Sample Selection and Data Sources:
Lu3NbO7:Yb3t/Ho3t phosphors were prepared with various concentrations of Yb3t and Ho3t.
3：3t. List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Chemicals used include Nb2O5, Lu2O3, Yb2O3, and Ho2O
4：Equipment includes a muffle furnace, X-ray diffractometer, SEM, FT-IR spectrometer, and a Horiba/Jobin Yvon Fluorolog-3 double monochromator. Experimental Procedures and Operational Workflow:
Raw materials were mixed, ground, heated, and then characterized by XRD, SEM, EDS, and FT-IR. UC spectra were obtained under 980 nm excitation.
5：Data Analysis Methods:
The UC emission intensity dependence on pump power was analyzed, and temperature sensing performances were investigated using fluorescence intensity ratio technology.
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