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Updated: Jul 3, 2025
07:03
Low-energy Cathodoluminescence for OxyNitride Phosphors
Published on: November 15, 2016
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An efficient blue-violet phosphor: an advanced material designed for high-quality full-spectrum lighting
Xiudi Wu1,2, Yonghui Xu1,2, Shuwen Yin1
1State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China. zhoul@ciac.ac.cn.
Dalton Transactions (Cambridge, England : 2003)
|February 13, 2024
Summary
A new blue-violet emitting phosphor, Ba1.31Sr3.69(BO3)3Cl:Ce3+ (BSBCl:Ce3+), offers high quantum efficiency and thermal stability. This material is ideal for advanced solid-state white light-emitting diodes (WLEDs) and indoor illumination applications.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Photonics
Background:
- High-efficiency phosphors are essential for advanced solid-state white light-emitting diodes (WLEDs).
- Developing phosphors with excellent luminescence, thermal stability, and quantum efficiency is critical for WLED performance.
Purpose of the Study:
- To synthesize and characterize a novel blue-violet emitting phosphor, Ba1.31Sr3.69(BO3)3Cl:Ce3+ (BSBCl:Ce3+).
- To evaluate its potential for use in full-spectrum WLEDs, focusing on thermal stability and quantum efficiency.
Main Methods:
- High-temperature solid-phase synthesis was used to create BSBCl:Ce3+ phosphors with varying Ce3+ concentrations.
- Photoluminescence spectroscopy was employed to analyze excitation and emission properties.
- Quantum efficiency (internal and external) and thermal stability were measured.
Main Results:
- BSBCl:0.03Ce3+ exhibited a broad excitation band (250-400 nm), compatible with near-UV LED chips.
- An internal quantum efficiency (IQE) of 88.2% and external quantum efficiency (EQE) of 60.9% were achieved under 330 nm excitation.
- The phosphor demonstrated excellent thermal stability (83% intensity retention at 473 K) and color stability.
Conclusions:
- The synthesized BSBCl:Ce3+ phosphor shows promising properties for WLED applications.
- Its high efficiency, thermal stability, and compatibility with near-UV LEDs make it suitable for health-oriented indoor illumination.
- Further development could lead to improved WLEDs with enhanced color rendering.
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