Achieving Ultra‐Broadband Near‐Infrared Emission in Cr3+‐Activated Cs2NaScCl6 Perovskite for Efficient Phosphor‐Converted Light‐Emitting Diodes

Ultra‐broadband near‐infrared (NIR) phosphor‐converted light‐emitting diodes (pc‐LEDs) have great application prospects in research and industrial fields. However, simultaneously achieving highly efficient and ultra‐broad NIR emission in phosphor material remains a challenge. Herein, an ultra‐broadb...

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Bibliographic Details
Published in:Advanced optical materials 2024-01, Vol.12 (2), p.n/a
Main Authors: Wang, Zhaoyu, Chen, Yameng, Ke, Jianxi, Wei, Youchao, Liu, Yongsheng, Hong, Maochun
Format: Article
Language:English
Subjects:
Broadband
Charge transfer
Cr3
Cs2NaScCl6
First principles
Light emitting diodes
Medical imaging
near infrared emissions
Near infrared radiation
Nondestructive testing
Perovskites
Phosphors
Trivalent chromium
Ultraviolet radiation
ultra‐broadband luminescence
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Summary:Ultra‐broadband near‐infrared (NIR) phosphor‐converted light‐emitting diodes (pc‐LEDs) have great application prospects in research and industrial fields. However, simultaneously achieving highly efficient and ultra‐broad NIR emission in phosphor material remains a challenge. Herein, an ultra‐broadband NIR emission in the range of 800–1200 nm with ultra‐high emission efficiency of up to 64.2% is first achieved by substituting the Sc3+ site in Cs2NaScCl6 perovskite single‐crystal with a Cr3+ ion. By combining the experimental results with first‐principles calculations, an efficient charge transfer sensitization process from host to Cr3+ is found to be the fundamental reason for the ultra‐high NIR emission efficiency. Benefiting from the excellent efficiency and superior chemical resistance to heat and UV radiation, an ultra‐broadband NIR pc‐LED made of this phosphor demonstrates great potential in biomedical imaging, nondestructive testing, and night‐vision devices. Ultra‐broadband near‐infrared (NIR) emission in the range of 800–1200 nm is achieved by incorporating Cr3+ into a Cs2NaScCl6 single‐crystal matrix. The Cs2NaScCl6:Cr phosphor with a high photoluminescence quantum yield of 64.2% and excellent environmental stability shows unique advantages as the NIR light source in applications such as biomedical imaging, non‐destructive testing, and night‐vision devices.
ISSN:2195-1071
2195-1071
DOI:10.1002/adom.202301323