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Updated: Aug 12, 2026
07:03
Low-energy Cathodoluminescence for (Oxy)Nitride Phosphors
Published on: November 15, 2016
Engineering Efficient Long-Wavelength Broadband NIR Persistent Luminescence for Multifunctional Applications
Qiyue Sun1, Wenjun Hu1, Fangyi Zhao1
1Center of Advanced Optoelectronic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, China.
Small (Weinheim an Der Bergstrasse, Germany)
|August 10, 2026
Summary
We developed a novel chromium-doped phosphor (NCSGO:Cr3+) for near-infrared persistent luminescence. This material offers long-wavelength, broadband emission and extended luminescence duration for advanced optical applications.
Area of Science:
- Materials Science
- Solid State Chemistry
- Photonics
Background:
- Near-infrared (NIR) persistent luminescent (PersL) materials are crucial for bioimaging and data storage.
- Current Cr3+-doped NIR PersL materials have limitations in emission wavelength and spectral bandwidth.
Purpose of the Study:
- To develop an optimized Cr3+-doped Na2CaSn2Ge3O12 (NCSGO:Cr3+) phosphor.
- To achieve long-wavelength, broadband NIR PersL with enhanced performance.
Main Methods:
- Synthesis and characterization of NCSGO:Cr3+ phosphor.
- Investigation of electron charging processes and trap distributions.
- Demonstration of practical applications.
Main Results:
- Achieved long-wavelength broadband NIR PersL with a peak at 815 nm and a 124 nm bandwidth.
- Exhibited a PersL duration exceeding 80 hours.
- Cr3+ doping enhanced brightness, duration, and excitation flexibility, with the undoped host showing self-activated PersL.
Conclusions:
- The optimized NCSGO:Cr3+ phosphor offers superior NIR PersL properties.
- Cr3+ doping is an effective strategy for tailoring long-wavelength broadband NIR PersL.
- Demonstrated potential in night-time reading, encryption, and deep-tissue imaging.
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