1. A Ho3+-Based Luminescent Thermometer for Sensitive Sensing over a Wide Temperature Range
- Author
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van Swieten, Thomas P., Yu, Dechao, Yu, Ting, Vonk, Sander J.W., Suta, Markus, Zhang, Qinyuan, Meijerink, Andries, Rabouw, Freddy T., Sub Condensed Matter and Interfaces, Sub Soft Condensed Matter, Sub Inorganic Chemistry and Catalysis, Condensed Matter and Interfaces, Inorganic Chemistry and Catalysis, Soft Condensed Matter and Biophysics, Sub Condensed Matter and Interfaces, Sub Soft Condensed Matter, Sub Inorganic Chemistry and Catalysis, Condensed Matter and Interfaces, Inorganic Chemistry and Catalysis, and Soft Condensed Matter and Biophysics
- Subjects
Materials science ,business.industry ,cross-relaxation ,chemistry.chemical_element ,lanthanide luminescence ,Atmospheric temperature range ,Cross relaxation ,luminescence thermometry, remote thermometry ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,chemistry ,Atomic and Molecular Physics ,Thermometer ,Electronic ,remote thermometry ,Optoelectronics ,holmium ,Optical and Magnetic Materials ,and Optics ,Luminescence ,business ,Holmium ,luminescence thermometry - Abstract
Luminescence thermometry is used in a variety of research fields for noninvasive temperature sensing. Lanthanide‐doped micro‐/nanocrystals are exceptionally suitable for this. The popular concept of luminescence‐intensity‐ratio thermometry is based on emission from thermally coupled levels in a single lanthanide ion, following Boltzmann's law. These thermometers can measure temperature with low uncertainty, but only in a limited temperature range. In this work, a Ho3+‐based thermometer is presented and quantitatively modeled with sustained low temperature uncertainty from room temperature up to 873 K. The thermometer shows bright green and red luminescence with a strong and opposite dependence on temperature and Ho3+ concentration. This is the result of temperature‐dependent competition between multi‐phonon relaxation and energy transfer, feeding the green‐ and red‐emitting levels, respectively, following excitation with blue light. This simple and quantitative model of this competition predicts the output spectrum over a wide range of temperatures (300–873 K) and Ho3+ concentrations (0.1–30%). The optimum Ho3+ concentration can thus be determined for reliable measurements over any temperature range of interest. Quantitative modeling as presented here is crucial to optimally benefit from the potential of energy‐transfer thermometers to achieve low measurement uncertainties over a wide temperature range.
- Published
- 2021