Energy-saving chromium-activated garnet-structured phosphor-converted near-infrared light-emitting diodes

Phosphor-converted near-infrared light-emitting diodes (pc-NIR LEDs) are smart and energy-saving light sources compared with conventional tungsten halogen light bulbs and will enable upcoming modern devices to meet the requirements of various non-destructive security, military, medicine, and biomedi...

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Bibliographic Details
Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2022-10, Vol.1 (39), p.14367-14378
Main Authors: Rajendran, Veeramani, Huang, Wen-Tse, Chen, Kuan-Chun, Chang, Ho, Liu, Ru-Shi
Format: Article
Language:English
Subjects:
Garnets
Light emitting diodes
Light sources
Luminaires
Luminescence
Military applications
Near infrared radiation
Phosphors
Thermal stability
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Summary:Phosphor-converted near-infrared light-emitting diodes (pc-NIR LEDs) are smart and energy-saving light sources compared with conventional tungsten halogen light bulbs and will enable upcoming modern devices to meet the requirements of various non-destructive security, military, medicine, and biomedicine applications due to their compactness, low cost, and versatility. NIR phosphors with garnet structures are being investigated because of their advantages of high internal efficiency, high thermal stability, and tunable spectral properties. In this paper, the garnet structure is exclusively reviewed to unravel its structure-property relationship and to understand the luminescence mechanism of Cr 3+ . This work provides a deep understanding of NIR luminescence in the garnet system and is expected to guide the design of next-generation garnet-based smart NIR light sources. Phosphor-converted near-infrared light-emitting diodes based on garnet structure as the host for chromium incorporation are promising light sources for modern compact devices and are also an excellent alternative to traditional tungsten lamps.
ISSN:2050-7526
2050-7534
DOI:10.1039/d2tc02817d