典型文献
Extending the dynamic temperature range of Boltzmann thermometers
文献摘要：
Lanthanide-doped(nano)crystals are an important class of materials in luminescence thermometry.The working mechanism of these thermometers is diverse but most often relies on variation of the ratio of emission intensities from two thermally coupled excited states with temperature.At low temperatures,nonradiative coupling between the states can be slow compared to radiative decay,but,at higher temperatures,the two states reach thermal equilibrium due to faster nonradiative coupling.In thermal equilibrium,the intensity ratio follows Boltzmann statistics,which gives a convenient model to calibrate the thermometer.Here,we investigate multiple strategies to shift the onset of thermal equilibrium to lower temperatures,which enables Boltzmann thermometry in a wider dynamic range.We use Eu3+-doped microcrystals as a model system and find that the nonradiative coupling rates increase for host lattices with higher vibrational energies and shorter lanthanide—ligand distances,which reduces the onset temperature of thermal equilibrium by more than 400 K.We additionally reveal that thermometers with excited states coupled by electric-dipole transitions have lower onset temperatures than those with magnetic-dipole-coupled states due to selection rules.These insights provide essential guidelines for the optimization of Boltzmann thermometers to operate in an extended temperature range.
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作者姓名：
Thomas Pieter van Swieten;Jesse Merllijn Steenhoff;Auke Vlasblom;Ravi de Berg;Sam Pieter Matttern;Freddy Teunis Rabouw;Markus Suta;Andries Meijerink
作者机构：
Debye Institute for Nanomaterials Science,Utrecht University,Princetonplein 1,3584 CC Utrecht,The Netherlands;Inorganic Photoactive Materials,Heinrich Heine University Düsseldorf,Universit?tsstra?e 1,40225 Düsseldorf,Germany
文献出处：
引用格式：
[1]Thomas Pieter van Swieten;Jesse Merllijn Steenhoff;Auke Vlasblom;Ravi de Berg;Sam Pieter Matttern;Freddy Teunis Rabouw;Markus Suta;Andries Meijerink-.Extending the dynamic temperature range of Boltzmann thermometers)[J].光：科学与应用（英文版）,2022(12):3069-3079
A类：
thermometers
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AB值：
0.540595
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