Er³⁺/Yb³⁺ co‐doped oxyfluoro tellurite glasses: Analysis of optical temperature sensing based on up‐conversion luminescence

Abstract

The effect of Yb 3+ co-doping on relaxation dynamics of excited states of Er 3+ ion in oxyfluoro tellurite (TZYN) glasses was demonstrated employing excitation and luminescence spectroscopy. The up-conversion luminescence spectra were studied as a function of temperature in the 298-633 K range, and fluorescence intensity ratio (FIR) for green bands due to the 2 H 11/2 → 4 I 15/2 and 4 S 3/2 → 4 I 15/2 transitions of Er 3+ ion against temperature was determined. The temperature sensing performance of TZYN:Er 3+ /Yb 3+ glasses was studied using the FIR technique up to 633 K. The maximum absolute (S a ) and relative (S r ) sensitivity of 0.00246 K −1 at 413 K and 0.72% K −1 at 323 K, respectively, were determined for TZYN:0.5Er 3+ /1.0 Yb 3+ glass.

Highly Sensitive Dual-Mode Optical Thermometry of Er3+/Yb3+ Codoped Lead-Free Double Perovskite Microcrystal

“…The electron population of the 4 S 3/2 energy level is effectively populated to the 4 F 9/2 energy level through nonradiative relaxation, which result in an increase of the population of the 4 F 9/2 energy level and a decrease in the population of the 4 S 3/2 energy level. The second is that electron population of the 4 S 3/2 energy level is populated efficiently to the 2 H 11/2 energy level by thermal activation, which also weakens the 4 S 3/2 emission intensity . The function graphs of three representative FIR techniques for CANIBC:1,0 and CANIBC:1,10 ( I 530 / I 610 , I 556 / I 610 , I 663 / I 610 ) versus temperature are indicated in Figure S3.…”

“…The second is that electron population of the 4 S 3/2 energy level is populated efficiently to the 2 H 11/2 energy level by thermal activation, which also weakens the 4 S 3/2 emission intensity. 24 The function graphs of three representative FIR techniques for CANIBC:1,0 and CANIBC:1,10 (I 530 /I 610 , I 556 /I 610 , I 663 /I 610 ) versus temperature are indicated in Figure S3. Using the FIR between perovskite and Er 3+ as a temperature probe signal, it is known that the values of FIR for three models increase swiftly with increasing temperature.…”

Up- and Downconversion Dual-Mode Excitation Spectral Studies of Rare Earth Doped KLaF4 Nano Emitters for Biophotonic Applications

“…for different concentrations of rare earth dopants. A summary of the dopant concentration and number of photons involved ( n ) ( I ∝ P n ) in upconversion photoluminescence (UC PL) in various host lattices under 980 nm laser excitation are summarized in Table S3. − …”

Down/Upconversion Luminescence Behaviors and Temperature-Sensing Properties of Highly Transparent (Er1–xYbx)2O3 Ceramics

“…Apart from upconversion luminescence, Er 3+ can also emit down-converted near-infrared radiation at 1.4−1.7 μm ( 4 I 13/2 → 4 I 15/2 transition) under 980 nm laser excitation for humaneye-safety remote sensing application. The Er-doped silica matrix was proposed as a luminescent material for achieving optical gain, but the total Er concentration is rather low (∼10 19 /cm 3 ) due to its restricted solid solubility. 8 In order to obtain a reasonable gain in an active microphotonic device, Miritello et al prepared the Er 2 O 3 thin films that contained a high Er 3+ concentration of ∼10 22 /cm 3 to overcome the limit, which were potentially suitable for optoelectronic application.…”

“…16 Subsequently, Yakovlev et al fabricated transparent La 3+ -doped Er 2 O 3 ceramics and studied their Faraday effects for magneto-optical sensor application. 17 Even though the photoluminescence behaviors of Er 3+ -/ Yb 3+ -doped oxides, 18 oxyfluoride, 19 phosphate, 20 borate, 21 silicate, 22 and tungstate 23 have been widely reported, the effect of the Yb 3+ dopant in the Er 2 O 3 lattice on the luminescent behavior has a rare report. In this work, we prepared a series of transparent (Er 1−x Yb x ) 2 O 3 (x = 0−0.01) ceramics and studied their optical properties via detailed spectroscopic analysis approaches, including in-line transmittance and down-/upconversion luminescence.…”