Negative thermal expansion triggered anomalous thermal upconversion luminescence behaviors in Er³⁺/Yb³⁺-codoped Y₂Mo₃O₁₂ microparticles for highly sensitive thermometry

Abstract

For the sake of overcoming the challenges of the optical thermometers with high sensitivity, we designed the Er3+/Yb3+-codoped Y2Mo3O12 microparticles with thermally enhanced upconversion (UC) emissions. Excited at 980 nm,...

Tailoring of Upconversion Emission in Tm3+/Yb3+-Codoped Y2Mo3O12 Submicron Particles Via Thermal Stimulation Engineering for Non-invasive Thermometry

“…As is shown, the studied compounds are made of corner-shared [YO 6 ] octahedrons and [MoO 4 ] tetrahedrons, in which the corner of the [YO 6 ] octahedron is shared by six [MoO 4 ] tetrahedrons, whereas the corner of the [MoO 4 ] tetrahedron is shared by four [YO 6 ] octahedrons. Notably, with elevating the temperature, the aforementioned structure is not stable and can be rotated, resulting in the lattice contraction and the enhanced ET from the sensitizer to the activator. , Figure b presents the X-ray diffraction (XRD) patterns of YMO:Tm 3+ /2 x Yb 3+ submicron particles. It is significant that these recorded diffraction profiles are the same, and they exhibit a perfect correlation with the orthorhombic YMO (JCPDS #28–1541), implying that the doping ions (Tm 3+ , Yb 3+ ) have little impact on the phase composition of YMO, and the synthesized submicron particles possess a pure orthorhombic phase.…”

“…Evidently, the FIR values are hardly changed even after several cycled heating-cooling processes. Moreover, to quantitatively describe the reversibility of the studied samples, we utilized the following expression to calculate the repeatability ( R ) , herein, Q i and Q avg stand for the obtained FIR value and the average FIR value, respectively. Thus, the R values of I 700 / I 481 and I 700 / I 654 combinations are 94.2 and 94.8%, respectively, indicating that the prepared compounds possess splendid reversibility.…”

Negative and Near-Zero Thermal Expansion in A2M3O12 and Related Ceramic Families: A Review

“…The application of A 2 M 3 O 12 materials in optical thermometry is a recent research topic (Zou et al, 2019;Lv et al, 2021). Er 3+ / Yb 3+ co-doped Y 2 Mo 3 O 12 microparticles have been proposed for this purpose.…”

“…Er 3+ /Yb 3+ co-doped Y 2 Mo 3 O 12 shows rapid response, high spatial resolution and can be read without contact, providing advantages over traditional thermometers. Er 3+ /Yb 3+ co-doped Y 2 Mo 3 O 12 microparticles irradiated at 980 nm can have bright green emission, which becomes more intense with increasing temperature, presenting a mechanism for optical thermometry (Lv et al, 2021).…”

Investigation on anomalous thermal enhancement and temperature sensing properties of Zn3Mo2O9:Yb3+/RE3+ (RE = Er/Ho) phosphors

“…In recent years, the phenomenon of luminescent thermal enhancement has been discovered and has attracted attention, and the excellent fluorescence properties have attracted extensive attention of researchers, bringing Dawn to overcome the thermal quenching of luminescent materials and optical ultrahigh temperature detection. [20][21][22] In 2014, Jiang et al discovered and reported the abnormal UC luminescence thermal enhancement of NaYF 4 :Yb 3+ /Er 3+ nanocrystals with less than 30 nm nanoparticles. 23 In 2019, Meijerink reported the thermal enhancement of NaY(WO 4 ) 2 :Yb 3+ /Er 3+ nanoparticles and Wang et al also reported on the thermal enhancement phenomenon caused by NTE in Yb 2 W 3 O 12 crystallites.…”