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Rb2InCl5·H2O doped with Te4+ for fluorescence thermometry and coordinated water-related structural phase
Optics Letters
|November 1, 2024
Summary
We developed a novel orange-luminescent material, Rb2InCl5·H2O doped with tellurium (Te4+), for non-contact temperature sensing. Its luminescence properties show significant temperature dependence, enabling accurate remote measurements.
Area of Science:
- Materials Science
- Solid State Chemistry
- Luminescence
Background:
- Pure Rb2InCl5·H2O exhibits no luminescence.
- Developing new luminescent materials is crucial for advanced sensing applications.
Purpose of the Study:
- To synthesize and characterize tellurium (Te4+)-doped Rb2InCl5·H2O.
- To investigate its luminescence properties and temperature-sensing capabilities.
- To analyze temperature-induced structural changes.
Main Methods:
- Coprecipitation method for material synthesis.
- Photoluminescence (PL) spectroscopy to study luminescence and lifetime.
- Temperature-dependent Raman spectroscopy to analyze structural changes.
Main Results:
- Synthesized Rb2InCl5·H2O doped with Te4+ exhibiting orange luminescence (peak at 648 nm).
- Demonstrated strong temperature dependence of PL lifetime with high sensitivity (SA = 12 × 10^-3 K^-1 at 260 K, SR = 3.5% K^-1 at 300 K).
- Observed temperature-induced structural phase transformations related to coordinated water, with reversible behavior.
Conclusions:
- Te4+-doped Rb2InCl5·H2O is a promising material for non-contact remote temperature sensing.
- The material's luminescence and structural properties are sensitive to temperature variations.
- Understanding the structural dynamics provides insights into the sensing mechanism.
