Manipulating the thermometric behaviors of Er³⁺/Yb³⁺/Ho³⁺-tridoped La₂Mo₃O₁₂ polychromatic upconverting microparticles via adjusting spatial mode and a sensing strategy

Abstract

To meet the needs of contactless optical thermometry, Er3+/Yb3+/Ho3+-tridoped La2Mo3O12 (LMO) microparticles were designed. Excited at 980 nm light, the resultant compounds emit glaring upconversion (UC) emissions and their emitting...

Regulating the upconversion luminescence properties of Tm3+/Yb3+-codoped ZrScW2PO12 microparticles with a negative thermal expansion effect through thermal stimulation for optical thermometry

“…from 303 to 623 K), the prepared samples still exhibit the pure orthorhombic phase, implying their high thermal stability, which enables their promising applications in a high-temperature environment. Moreover, according to the obtained XRD patterns, it is evident that the cell volume shows a significant downward tendency at elevated temperatures, namely, it decreases from about 1128.757 to 1121.443 Å 3 , as presented in 32 Moreover, two peaks at 1624 and 3453 cm −1 , which are assigned to O-H vibrations, 33 are also observed in the studied samples. On the other hand, the light harvesting capacities of the final products were characterized by UV-vis diffuse-reflectance spectroscopy and the corresponding spectra are illustrated in Fig.…”

“…As revealed, all the samples exhibit an intense absorption band in the range of around 500–1450 cm −1 , corresponding to the overlapped vibrations of [WO 4 ] 2− , [PO 4 ] 3− and [ZrO 4 ] 4− groups. 32 Moreover, two peaks at 1624 and 3453 cm −1 , which are assigned to O–H vibrations, 33 are also observed in the studied samples. On the other hand, the light harvesting capacities of the final products were characterized by UV-vis diffuse-reflectance spectroscopy and the corresponding spectra are illustrated in Fig.…”

Multifunctional Optical Sensing with Lanthanide-Doped Upconverting Nanomaterials: Improving Detection Performance of Temperature and Pressure in the Visible and NIR Ranges

“…Based on the collected findings, it can be concluded that the designed thermometer is suitable for thermal sensing in both biological and industrial systems. The findings demonstrate that the NSYM-based phosphor exhibits superior temperature resolution compared to the Gd 2 Mo 3 O 12 :Yb 3+ /Er 3+ and La 2 Mo 3 O 12 :Yb 3+ /Er 3+ /Ho 3+ phosphors and Yb 3+ /Tm 3+ -Y 2 Mo 3 O 12 ceramics within the specified operating temperature range. ,, The results of our study indicate that NSYM-upconverting materials, which exhibit a high degree of sensitivity to thermal changes and little error in temperature measurements, have great potential for optical thermometry using the LIR technique.…”