Modeling the Performance of Dy³⁺‐Based Boltzmann Thermometers by the Judd–Ofelt Theory

Abstract

Energy level positions, refractive index values, Judd-Ofelt (JO) intensity parameters, Slater integrals, and spin-orbit coupling parameters are taken from the literature for 27 Dy 3+ -doped materials (five crystals and 22 glasses). Investigated are only the transitions that are used for the Boltzmann-type luminescence intensity ratio (LIR) thermometers (transitions from the three thermalized levels, 4 F 9/2 , 4 I 15/2 , and 4 G 11/2 to the ground level). Reduced matrix elements of these three transitions are calculated from the Slater integrals and spin-orbit coupling parameters and they are compared to the most frequently used values from Carnall's tables. The comparison of JO parameters shows the smaller variation of the 𝛀 6 , related to rigidity, in crystal hosts than in glasses, and the opposite was observed for the 𝛀 2,4 parameters. LIR performances are simulated by the JO thermometric model for each material by the conventional LIR and the LIR that exploits the third thermalized level. The comparison of the predicted figures of merit in luminescence thermometry reveals the most promising thermometric Dy 3+ doped crystals and glasses.

Exploiting High-Energy Emissions of YAlO3:Dy3+ for Sensitivity Improvement of Ratiometric Luminescence Thermometry

“…The comparison of the performance of YAP:Dy 3+ with other probes that include the thermalization of the 3rd excited level for LIR is given in Table 2 . The more extensive comparison of LIR2 and sensitivities for Er 3+ and Dy 3+ ions can be found in the literature where the values were obtained theoretically for many hosts from the Judd–Ofelt theory [ 37 , 38 ], while Table 2 only presents and compares the values obtained experimentally. Sr values in Table 2 are given in a format that allows comparisons at all temperatures.…”

Current stage and future development of Belgrade collisional and radiative databases/datasets of importance for molecular dynamics

“…Dataset is obtained in Srec ´kovic ´et al 54 of the main uses of JO theory in these, and indeed many other applications, is to provide a characterization of a materials optical properties. Moreover, use of JO parameters is a convenient tool for predicting materials characteristics, [113][114][115][116][117] and we have decided to build our own database with JO parameters (henceforth described as JO Database). JO parameters can be calculated from experimentally obtained emission and excitation spectra of Rare earth doped materials.…”

“…JO parameters can be calculated from experimentally obtained emission and excitation spectra of Rare earth doped materials. [114][115][116][117][118][119][120] A Typical time-resolved spectrum of rare earth doped phosphor (YVO 4 :Eu) acquired in our measurements is shown in Fig. 6.…”