Phosphor thermometry: On the synthesis and characterisation of Y3Al5O12:Eu (YAG:Eu) and YAlO3:Eu (YAP:Eu)

Kissel, T.; Brübach, J.; Euler, M.; Frotscher, Michael; Litterscheid, Christian; Albert, Barbara; Dreizler, Andreas

doi:10.1016/j.matchemphys.2013.02.065

Cited by 26 publications

(7 citation statements)

References 18 publications

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“…[ 85,86,134–138 ] Recently reported creative alternatives of the use of this upconversion couple were vacuum sensing [ 139 ] or photothermal conversion. [ 140 ] Finally, Sm 3+ , [ 141,142 ] Eu 3+ , [ 135,143–146 ] Dy 3+[ 147–153 ] or Ho 3+[ 154–157 ] show potential for thermometry far above room temperature, as was also reviewed by Chambers and Clarke. [ 158 ]…”

Section: Introductionmentioning

confidence: 97%

A Theoretical Framework for Ratiometric Single Ion Luminescent Thermometers—Thermodynamic and Kinetic Guidelines for Optimized Performance

Suta

Meijerink

2020

Advcd Theory and Sims

193

191

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Luminescence (nano)thermometry is an increasingly important field for remote temperature sensing with high spatial resolution. Most typically, ratiometric sensing of the luminescence emission intensities of two thermally coupled emissive states based on a Boltzmann equilibrium is used to detect the local temperature. Dependent on the temperature range and preferred spectral window, various choices for potential candidates appear possible. Despite extensive experimental research in the field, a universal theory covering the basics of luminescence thermometry is virtually nonexistent. In this manuscript, a general theoretical framework of single ion luminescent thermometers is presented that offers simple, user-friendly guidelines for both the choice of an appropriate emitter and respective embedding host material for optimum temperature sensing. The results show that the optimum performance (thermal response and sensitivity) around T 0 is realized for an energy gap ∆E 21 between thermally coupled levels between 2k B T 0 and 3.41k B T 0. Analysis of the temperature-dependent excited state kinetics shows that host lattices in which ∆E 21 can be bridged by one or two phonons are preferred over hosts in which higher order phonon processes are required. Such a framework is relevant for both a fundamental understanding of luminescent thermometers but also the targeted design of novel and superior luminescent (nano)thermometers.

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Section: Introductionmentioning

confidence: 97%

A Theoretical Framework for Ratiometric Single Ion Luminescent Thermometers—Thermodynamic and Kinetic Guidelines for Optimized Performance

Suta

Meijerink

2020

Advcd Theory and Sims

193

191

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“…Moreover, this effect was not observed for YAG:Eu, which is also excited at 266 nm. For YAG:Eu it has been reported that a reducing methane/nitrogen atmosphere will shift the calibration curve by about 25 K, probably due to redox reactions [26]. However, for a gas turbine application with typically lean conditions this should not cause systematic errors.…”

Section: Discussion Of Different Phosphorsmentioning

confidence: 99%

“…Figure 3 shows emission spectra of all investigated phosphors. Spectra of YAG:Dy and YAG:Tb were measured at 1100 K, while the spectra of YAG:Eu [26], Al 2 O 3 :Cr (ruby) and Mg 4 FGeO 6 :Mn (SV67) were measured at room temperature. The detection wavelengths listed in Tab.…”

Section: Phosphor Selection and Characterizationmentioning

confidence: 99%

Wall Temperature Measurements in Gas Turbine Combustors With Thermographic Phosphors

Nau

Yin

Lammel

et al. 2018

Journal of Engineering for Gas Turbines and Power

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Phosphor thermometry has been developed for wall temperature measurements in gas turbines and gas turbine model combustors. An array of phosphors has been examined in detail for spatially and temporally resolved surface temperature measurements. Two examples are provided, one at high pressure (8 bar) and high temperature and one at atmospheric pressure with high time resolution. To study the feasibility of this technique for full-scale gas turbine applications, a high momentum confined jet combustor at 8 bar was used. Successful measurements up to 1700 K on a ceramic surface are shown with good accuracy. In the same combustor, temperatures on the combustor quartz walls were measured, which can be used as boundary conditions for numerical simulations. An atmospheric swirl-stabilized flame was used to study transient temperature changes on the bluff body. For this purpose, a high-speed setup (1 kHz) was used to measure the wall temperatures at an operating condition where the flame switches between being attached (M-flame) and being lifted (V-flame) (bistable). The influence of a precessing vortex core (PVC) present during M-flame periods is identified on the bluff body tip, but not at positions further inside the nozzle.

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“…The sharp-line emission from different closely spaced levels can be easily observed and separated, which allows for a highly accurate determination of intensity ratios. Advantages of Ln-doped inorganic host materials over other optical probes (e.g., quantum dots [22] or organic complexes [23]) are the high quenching temperature of emission [24,25], thermal stability of the material, and the insensitivity of the optical properties to variations in the environment (such as pH, embedding medium or solvent, pressure, etc.). For bio-imaging and other applications in the temperature range 300-600 K, Er 3+ is a popular probe [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Non-Boltzmann Luminescence inNaYF4:Eu3+: Implications for Luminescence Thermometry

2018

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Luminescence (nano)thermometry is an important technique for remote temperature sensing. The recent development of lanthanide-doped nanoparticles with temperature-dependent emission has expanded the field of applications, especially for ratiometric methods relying on the temperature variation of relative emission intensities from thermally coupled energy levels. Analysis and calibration of the temperature dependence is based on a Boltzmann equilibrium for the coupled levels. To investigate the validity of this assumption, we analyze and model thermal equilibration for Eu 3+ 5 D 1 and 5 D 0 emission in NaYF 4. The results show that for low Eu 3+ concentrations, temperature-dependent multiphonon relaxation can accurately explain both the intensity ratio and emission decay dynamics. The analysis also reveals that a Boltzmann equilibrium is not realized in the temperature regime investigated (300-900 K). By increasing the Eu 3+ concentration, cross relaxation between neighboring Eu 3+ ions enhances 5 D 1-5 D 0 relaxation rates and extends the temperature range in which emission intensity ratios can be used for temperature sensing (500-900+ K). The results obtained are important for recognizing, understanding, and controlling deviations from Boltzmann behavior in luminescence (nano)thermometry. By varying the dopant concentration, the range for accurate temperature sensing can be adjusted. These insights are crucial in the development and understanding of reliable temperature sensors.

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Phosphor thermometry: On the synthesis and characterisation of Y3Al5O12:Eu (YAG:Eu) and YAlO3:Eu (YAP:Eu)

Cited by 26 publications

References 18 publications

A Theoretical Framework for Ratiometric Single Ion Luminescent Thermometers—Thermodynamic and Kinetic Guidelines for Optimized Performance

A Theoretical Framework for Ratiometric Single Ion Luminescent Thermometers—Thermodynamic and Kinetic Guidelines for Optimized Performance

Wall Temperature Measurements in Gas Turbine Combustors With Thermographic Phosphors

Non-Boltzmann Luminescence inNaYF4:Eu3+: Implications for Luminescence Thermometry

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