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Updated: May 2, 2026
07:03
Low-energy Cathodoluminescence for OxyNitride Phosphors
Published on: November 15, 2016
12.7K
Yellow-orange upconversion emission in Eu(3+)-Yb(3+) codoped BaTiO(3) phosphor
Astha Kumari1, Vineet Kumar Rai1, Kaushal Kumar1
1Laser and Spectroscopy Laboratory, Department of Applied Physics, Indian School of Mines, Dhanbad 826004, Jharkhand, India.
Summary
This study synthesized a europium (Eu3+) and ytterbium (Yb3+) codoped barium titanate (BaTiO3) phosphor. The material exhibits distinct upconversion emissions, indicating potential applications in optical devices.
Area of Science:
- Materials Science
- Solid State Physics
- Luminescence
Background:
- Barium titanate (BaTiO3) is a well-known perovskite material with diverse applications.
- Rare-earth ion doping is a common strategy to engineer optical properties of host materials.
- Upconversion luminescence allows for the conversion of lower-energy photons to higher-energy photons.
Purpose of the Study:
- To synthesize and characterize Eu3+-Yb3+ codoped BaTiO3 phosphor.
- To investigate the upconversion emission properties of the synthesized material.
- To understand the underlying mechanisms of the observed upconversion luminescence.
Main Methods:
- Co-precipitation method for phosphor synthesis.
- X-ray diffraction (XRD) for phase analysis.
- 980nm diode laser excitation for upconversion emission spectroscopy.
Main Results:
- The synthesized sample confirmed the tetragonal BaTiO3 phase via XRD.
- Sharp upconversion emission bands were observed for Eu3+ ions at ~592, ~614, ~654, ~704, and ~796 nm.
- A band at 489 nm was attributed to Yb3+ ions, and a broad band at ~505 nm to defect states.
Conclusions:
- The successful synthesis of Eu3+-Yb3+ codoped BaTiO3 phosphor was achieved.
- The material exhibits characteristic upconversion emissions from both Eu3+ and Yb3+ ions.
- The study provides insights into the upconversion processes and defect-related luminescence in the codoped BaTiO3 system.
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