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Structure and Optical Thermometry Characterization of Er3+/Yb3+ Co-Doped BaGd2CuO5
Journal of Nanoscience and Nanotechnology
|July 26, 2016
Summary
Er3+/Yb3+ co-doped BaGd2CuO5 phosphors exhibit green upconversion luminescence. These materials demonstrate high sensitivity for temperature sensing applications.
Area of Science:
- Materials Science
- Luminescence
- Solid-State Chemistry
Background:
- Upconversion luminescent materials are crucial for various optical applications.
- Rare-earth doped host materials offer tunable optical properties.
Purpose of the Study:
- To synthesize and characterize Er3+/Yb3+ co-doped BaGd2CuO5 upconversion luminescent materials.
- To investigate the temperature sensing capabilities of these phosphors.
Main Methods:
- Solid-phase synthesis method.
- X-ray diffraction (XRD) with Rietveld refinement for structural analysis.
- Optical spectroscopy to analyze upconversion luminescence.
- Fluorescence Intensity Ratio (FIR) technique for temperature sensing.
Main Results:
- Er3+/Yb3+ ions preferentially occupy the Gd(1) site in the BaGd2CuO5 structure.
- Green upconversion emissions at 523 nm and 547 nm were observed upon 971 nm laser diode excitation.
- The fluorescence intensity ratio (FIR) showed a temperature sensitivity of approximately 0.0038 K-1 in the range of 290 K-594 K.
- High transmission power at low excitation density was achieved.
Conclusions:
- Er3+/Yb3+ co-doped BaGd2CuO5 phosphors are promising candidates for optical thermometry.
- The material exhibits good sensitivity and performance for temperature measurements.
