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White Light Emission and Enhanced Color Stability in a Single-Component Host
Junhao Li1, Qiongyun Liang1, Jun-Yu Hong1
1Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry , Sun Yat-Sen University , Guangzhou 510275 , P. R. China.
ACS Applied Materials & Interfaces
|May 5, 2018
Summary
This study demonstrates novel white light generation using a controlled energy transfer chain of cerium (Ce3+), terbium (Tb3+), and europium (Eu3+) ions in GdBO3. This approach offers superior color stability for advanced lighting applications.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Luminescence
Background:
- Cerium (Ce3+) ion sensitization of Europium (Eu3+) via energy transfer is known for red phosphors in white light-emitting diodes (WLEDs).
- The Ce3+-(Tb3+)n-Eu3+ energy transfer system is underutilized, with potential for broader applications beyond red emission enhancement.
Purpose of the Study:
- To realize white light generation by leveraging the combined emissions of Ce3+, Tb3+, and Eu3+.
- To investigate the Ce3+-(Tb3+)n-Eu3+ energy transfer mechanism for white light emission in a GdBO3 host.
- To achieve superior color stability in the novel white light emitter.
Main Methods:
- Synthesis and characterization of GdBO3 doped with Ce3+, Tb3+, and Eu3+.
- Photoluminescence spectroscopy to analyze energy transfer pathways and emission spectra.
- Thermal quenching studies to evaluate luminescence stability at elevated temperatures.
Main Results:
- Successful generation of white light through controlled Ce3+-(Tb3+)n-Eu3+ energy transfer in GdBO3.
- Demonstration of blue (Ce3+), green (Tb3+), and red (Eu3+) emissions contributing to the white light spectrum.
- Well-matched thermal quenching rates for all three emission colors, ensuring excellent color stability.
Conclusions:
- This work presents the first instance of white light generation via controlled Ce3+-(Tb3+)n-Eu3+ energy transfer in GdBO3.
- The novel white light emitter exhibits superior color stability due to matched thermal quenching properties.
- The findings suggest significant potential for this material in advanced lighting applications.
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