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Unraveling the Remarkable Influence of Square Antiprism Geometry on Highly Efficient Far‐Red Emission of Eu3+ in Borotellurate Phosphors for Versatile Utilizations.
- Source :
-
Laser & Photonics Reviews . Aug2024, p1. 11p. 10 Illustrations. - Publication Year :
- 2024
-
Abstract
- Eu3+‐activated red‐emitting inorganic phosphors have been favored highly for their classical 5D0→7FJ (J = 0, 1, 2, 3, 4) emissions. However, the fatal drawbacks of poor luminous efficacy and weak 5D0→7F4 transition persist, resulting in the ongoing challenge of achieving far‐red emission. This research reports series of highly efficient far‐red phosphors LnTeBO5 (Ln = La3+, Y3+, Gd3+):Eu3+ with anomalously strong 5D0→7F4 transition, resulting from the distorted square antiprism [Ln/EuO8]. Both the luminous efficacy and thermal stability can be greatly enhanced via the simple composition variation. [Ln/EuO8] square antiprism‐triggered 5D0→7F2,4 transitions are elucidated in depth, acquiring ultra‐high luminous efficacy (IQE = 95%, EQE = 40%, and AE = 42%) and near‐zero thermal quenching (99%@150°C and 98%@200°C). Subsequently, the versatile utilizations in indoor lighting, plant growth lighting, and security ink are illustrated. This finding establishes a deep understanding for constructing high‐quality far‐red phosphors via the Eu3+‐centered structural units of square antiprism. [ABSTRACT FROM AUTHOR]
- Subjects :
- *INTERIOR lighting
*PLANT growth
*THERMAL stability
*PHOSPHORS
*SQUARE
Subjects
Details
- Language :
- English
- ISSN :
- 18638880
- Database :
- Academic Search Index
- Journal :
- Laser & Photonics Reviews
- Publication Type :
- Academic Journal
- Accession number :
- 178935081
- Full Text :
- https://doi.org/10.1002/lpor.202400843