Multifunctional optical thermometry based on the stark sublevels of Er³⁺ in CaO‐Y₂O₃: Yb³⁺/Er³⁺

Abstract

A conventional high temperature solid state method was utilized to prepare CaO-Y 2 O 3 , which is a potential candidate for manufacturing crucible material to melt titanium and titanium alloys with low cost. Meanwhile, Yb 3+ ions and Er 3+ ions were selected as the sensitizers and activators respectively to dope into CaO-Y 2 O 3 , aimed at providing real-time optical thermometry during the preparation process of titanium alloys realized using fluorescence intensity ratio (FIR) technology. The results reveal that a high measurement precision can be acquired by using the Stark sublevels of Er 3+ 4 F 9/2 to measure the temperature with a maximum absolute error of only about 3 K. In addition, by analyzing the dependence of 4 I 13/2 → 4 I 15/2 transition on pump power of 980 nm excitation wavelength, it was found that the laser-induced thermal effect has almost no influence on the temperature measurement conducted by using the FIR of the Stark sublevels of Er 3+ 4 I 13/2 , which means that a high excitation pump power can be used to obtain strong NIR emission and good signal-to-noise ratio for optical thermometry without the influence of the laser-induced thermal effect. All the results reveal that CaO-Y 2 O 3 : Yb 3+ /Er 3+ is an excellent temperature sensing material with high measurement precision. K E Y W O R D Sfluorescence intensity ratio, optical thermometry, upconversion, Yb 3+ /Er 3+

Up-conversion luminescence properties with temperature change of strontium tungstate phosphors

“…The excited Yb 3+ ions are adjacent to Er 3+ ions, which excite the Er 3+ ions to the 4 I 11/2 level through ET ( 2 F 5/2 (Yb 3+ ) + 4 I 15/2 (Er 3+ ) → 2 F 7/2 (Yb 3+ ) + 4 I 11/2 (Er 3+ )) and return to the ground state. 30–32 When an up-conversion phosphor with a wavelength of 980 nm is pumped by an excitation source, the Er 3+ ions are excited to the 4 I 11/2 level through the ET 1 process, and the GSA process, as shown in Fig. 5(c).…”

“…As the concentration of Er 3+ ions increased, PL intensity decreased, and it is considered that the energy absorbed due to the concentration quenching caused by excessive rare earth )) and return to the ground state. [30][31][32] When an up-conversion phosphor with a wavelength of 980 nm is pumped by an excitation source, the Er 3+ ions are excited to the 4 I 11/2 level through the ET 1 process, and the GSA process, as shown in Fig. 5(c).…”

Multiple fluorescence-temperature feedback in Y7O6F9:Er/Yb crystal-embedded polyacrylonitrile fibers

“…[21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40] Among various temperature-dependent fluorescence parameters, the temperature-based fluorescence intensity ratio (FIR) can circumvent the disturbances of the local environment and provide real-time feedback results. [41][42][43][44][45][46][47][48][49][50] In addition, Nd 3+ -based thermometers were proposed for bio-applications, and new multipurpose strategies, Cr 3+ -based Boltzmann thermometers, were demonstrated to be particularly promising. [51][52][53][54][55][56][57][58] Intense up-conversion luminescence and high-temperature sensitivity are vital parameters to construct an accurate thermometer, which can be optimized by selecting suitable rare earthdoped optical materials.…”

“…21–40 Among various temperature-dependent fluorescence parameters, the temperature-based fluorescence intensity ratio (FIR) can circumvent the disturbances of the local environment and provide real-time feedback results. 41–50 In addition, Nd 3+ -based thermometers were proposed for bio-applications, and new multipurpose strategies, Cr 3+ -based Boltzmann thermometers, were demonstrated to be particularly promising. 51–58…”

Avaliação das propriedades fotônicas do material fotoluminescente à base de SiO2 e Gd2O3 triplamente-dopado com Er3+/Yb3+/Eu3+ para conversão de energia

“…Materiais contendo Yb 3+ são desenvolvidos para diversas aplicações como termômetros óticos [32][33][34] , fibras óticas 35,36 e, principalmente como sensibilizador no upconversion, devido a sua alta sessão de choque e uma vez que a sua banda de absorção 4 F7/2 → 4 F5/2 é ressonante com a transição 4 H15/2 → 4 I11/2 do íon Er 3+ , permitindo a eficiente transferência de energia entre estes íons [37][38][39] .…”