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Designing a Double-Perovskite Ca2MgTeO6:Fe3+ Near-Infrared Phosphor for Multifunctional Applications
Xuewan Lin1, Jiyou Zhong1,2
1School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China.
Inorganic Chemistry
|December 15, 2025
Summary
Researchers developed a novel near-infrared (NIR) phosphor, Ca2MgTeO6:Fe3+, for efficient NIR light-emitting diodes (LEDs). This material achieves bright NIR emission beyond 900 nm, enabling advanced spectroscopic applications.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Luminescence
Background:
- Near-infrared (NIR) phosphors are crucial for NIR phosphor-converted light-emitting diodes (pc-LEDs) used in smart spectroscopic applications.
- Developing efficient, broadband NIR phosphors emitting beyond 900 nm presents significant challenges.
Purpose of the Study:
- To design and synthesize a novel NIR phosphor material.
- To investigate the potential of double-perovskite structures for NIR luminescence.
- To achieve efficient NIR emission for advanced applications.
Main Methods:
- Guided by design principles, Ca2MgTeO6 was selected as a host material for Fe3+ doping.
- Systematic analysis of crystal and electronic structures was performed.
- Experimental characterization of luminescence properties, including photoluminescence quantum yield (PLQY).
Main Results:
- The double-perovskite Ca2MgTeO6:Fe3+ phosphor exhibits NIR emission centered at 944 nm.
- An optimal doping concentration yielded a high photoluminescence quantum yield (PLQY) of 87.8% under 310 nm excitation.
- The developed phosphor demonstrated successful application in nondestructive testing, night vision, and information encryption.
Conclusions:
- The Fe3+-doped Ca2MgTeO6 double-perovskite is a promising efficient NIR phosphor.
- The material's broadband emission and high PLQY support its use in NIR pc-LEDs.
- Multifunctional applications highlight the material's versatility and practical potential.
