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Boltzmann-distribution-dominated persistent luminescence ratiometric thermometry in NaYF4:Pr3
Optics Letters
|April 1, 2022
Summary
A new optical temperature measurement method, persistent luminescence intensity ratio (PLIR) thermometry, uses persistent luminescence from NaYF4:Pr3+ material. The intensity ratio of specific luminescence lines indicates temperature variations.
Area of Science:
- Materials Science
- Optical Physics
- Nanotechnology
Background:
- Accurate temperature measurement is crucial in various scientific and industrial applications.
- Existing optical thermometry methods have limitations in certain environments.
- Persistent luminescence (PersL) materials offer unique properties for sensing applications.
Purpose of the Study:
- To propose and validate a novel optical temperature measurement technique using persistent luminescence.
- To investigate the potential of NaYF4:Pr3+ as a temperature sensing material.
- To establish a correlation between persistent luminescence intensity ratio and temperature.
Main Methods:
- Utilizing micro-sized NaYF4:Pr3+ material capable of emitting persistent luminescence after X-ray charging.
- Analyzing the persistent luminescence spectra, specifically the 3P1→3H5 and 3P0→3H5 transitions at ~522 nm and 538 nm.
- Applying the Boltzmann distribution model to the selected luminescence transitions.
Main Results:
- Demonstrated that the persistent luminescence intensity ratio of NaYF4:Pr3+ follows the Boltzmann distribution.
- Confirmed that the intensity ratio of the 522 nm and 538 nm PersL lines is a reliable indicator of temperature changes.
- Established a novel method for optical temperature sensing based on persistent luminescence.
Conclusions:
- Persistent Luminescence Intensity Ratio (PLIR) thermometry is a viable novel optical temperature sensing method.
- NaYF4:Pr3+ is a promising material for developing advanced optical thermometers.
- This research contributes a new tool to the field of optical temperature sensing.
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