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Achieved High-Sensitivity Single-Band Ratiometric Optical Thermometry by Manipulating the Intervalence

Chunwei Yang¹, Jianxia Liu¹, Chengzheng Jia¹

¹Department of Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China.

Inorganic Chemistry

|July 26, 2024

Summary

This summary is machine-generated.

This study introduces a new single-band ratiometric (SBR) optical thermometry method using Na2Gd2-xLaxTi3O10:Pr3+ phosphors. This approach offers easier analysis and high sensitivity for noncontact temperature measurements.

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Area of Science:

Materials Science
Solid-State Chemistry
Luminescence

Background:

Optical thermometry is crucial for noncontact temperature measurements across wide ranges.
Existing dual-band ratiometric methods can be complex; single-band ratiometric (SBR) thermometry offers simpler analysis and application.
Developing efficient SBR optical thermometers is essential for advancing temperature sensing technologies.

Purpose of the Study:

To develop a high-sensitivity single-band ratiometric (SBR) optical thermometer.
To investigate the effect of Gd/La substitution on the thermometric properties of Na2Gd2-xLaxTi3O10:Pr3+ phosphors.
To explore the potential of these phosphors for multifield applications, including thermometry and red light emission.

Main Methods:

Synthesized a series of Na2Gd2-xLaxTi3O10:Pr3+ phosphors (x = 0, 0.5, 1.0, 1.5, 2.0).
Utilized intervalence charge-transfer (IVCT) band modulation via Gd/La substitution.
Analyzed the thermal response difference of Pr3+ luminescence under charge-transfer band (CTB) and IVCT band excitation.

Main Results:

Achieved high-sensitivity SBR optical thermometry by enhancing the thermal response difference of Pr3+ emission.
The maximum relative sensitivity (Sr-max) reached 2.95% at 298 K.
The synthesized phosphors exhibit high-color-purity red emission, suggesting potential for diverse applications.

Conclusions:

Successfully developed a novel SBR optical thermometry based on Gd/La modulated Na2Gd2-xLaxTi3O10:Pr3+ phosphors.
The material demonstrates excellent thermometric performance and potential for multifield applications.
This work provides a promising platform for advanced optical temperature sensing.