Efficient upconversion emission and high-sensitivity thermometry of BaIn₂O₄:Yb³⁺/Tm³⁺/RE³⁺ (RE = Er³⁺, Ho³⁺) phosphor

Abstract

The BaIn2O4: Yb3+/Tm3+/RE3+ (RE=Er3+, Ho3+) upconversion (UC) phosphors are synthesized with a sol-gel method. The Rietveld refinement based on the XRD data proved that the In3+ ions are replaced by...

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

“…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. Furthermore, the temperature uncertainty (ΔT) of the designed optical thermometer based on YMO:Tm 3+ / 0.26Yb 3+ submicron particles is verified through the following expressions 53,54 T S where I 1 and I 2 are the UC emission intensities, andδI 1 and δI 2 are the errors of I 1 and I 2 , respectively. Thereby, when the combination of I 700 /I 481 is adopted, the ΔT value of YMO:Tm 3+ /0.26Yb 3+ submicron particles is decided to be around 0.01−0.07 K with adjusting the temperature in the range of 303−503 K, whereas its values is changed to be approximately 0.03−0.09 K when the I 700 /I 652 combination is employed, suggesting that the prepared samples exhibit high resolution in temperature measurement.…”

Visible and near-infrared luminescence properties of Nd3+/Yb3+ co-doped Gd2O3 phosphors for highly sensitive optical thermometry

“…According to the Mott–Seitz model, the relationship equation of FIR based on non-TCLs has been deduced by Carlos. 40 The equation has been derived as: 41 where A and B are constants. Then, S A and S R can be expressed by the following equations:…”

“…According to the Mott-Seitz model, the relationship equation of FIR based on non-TCLs has been deduced by Carlos. 40 The equation has been derived as: 41 FIR…”

Manipulating Upconversion Emission and Thermochromic Properties of Ho3+/Yb3+-Codoped Al2Mo3O12 Microparticles by Negative Lattice Expansion for Multimode Visual Optical Thermometry

“…32,33 Besides, to enhance the UC emission of Ho 3+ , Yb 3+ is needed to be codoped, since it is able to absorb near-infrared (i.e., NIR) efficiently and shift the captured energy to Ho 3+ . 34,35 Clearly, the influence of NTE on the UC emission and temperature In addition, based on the temperature-dependent color coordinates, we further investigated the thermometric behaviors of the resultant microparticles. , which were all purchased from Aladdin Company with purities of 99.99, 99.5, 99.99, and 99.9%, respectively, were employed as raw materials.…”

“…Thus, the investigation on the synthesis and luminescence properties of rare-earth ion-doped Al 2 Mo 3 O 12 materials is very necessary. As one of the rare-earth ions, Ho 3+ is considered an important upconverting activator, since it can emit strong green and red UC emissions. , Besides, to enhance the UC emission of Ho 3+ , Yb 3+ is needed to be codoped, since it is able to absorb near-infrared (i.e., NIR) efficiently and shift the captured energy to Ho 3+ . , Clearly, the influence of NTE on the UC emission and temperature sensing characterization of Ho 3+ /Yb 3+ -codoped Al 2 Mo 3 O 12 compounds has never been investigated yet. For the sake of making up this shortage, we utilized the high-temperature solid-state reaction method to synthesize Ho 3+ /Yb 3+ -codoped Al 2 Mo 3 O 12 microparticles, in which their basic features including phase component, microstructure, surface behavior, light harvest capacity, UC emission properties, and thermal quenching performance have been investigated in detail.…”