Minimizing Bond Angle Distortion to Improve Thermal Stability of Cr3+ Doped Near-Infrared Phosphor

doi:10.1002/lpor.202300092

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	Minimizing Bond Angle Distortion to Improve Thermal Stability of Cr3+ Doped Near-Infrared Phosphor
	L. Zhang, D. Wang, F. Liu, H. Wu, G. Pan, H. Wu, Z. Hao, H. Zhang and J. Zhang
	2023
发表期刊	Laser and Photonics Reviews
ISSN	18638880
卷号	17 期号:9
摘要	Broadband near-infrared (NIR) phosphor-converted light-emitting diodes are next-generation smart NIR light sources. However, the NIR phosphor suffers from serious thermal quenching (TQ), resulting in efficiency reduction and spectral shift. Here, a novel strategy is realized to suppress TQ by minimizing bond angle distortion, completely different from the conventional TQ suppression approach through bond length variation. Li(Sr1−xCax)AlF6:Cr3+ NIR phosphor is taken as an example in which rotation between the two parallel fluorine planes perpendicular to the C3 axis in the [AlF6] octahedron is found to dominate TQ. Increasing x from 0 to 1 reduces the amplitude of the rotation from 16.17° to 5.06°, weakening the electron–phonon coupling and, consequently, raising the TQ temperature significantly from 320 to 570 K. This mechanism is elucidated from both theoretical calculations and spectroscopic studies. The findings open a new horizon for the exploration of thermally stable NIR phosphors. © 2023 Wiley-VCH GmbH.
DOI	10.1002/lpor.202300092
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收录类别	sci ; ei
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/68181
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	L. Zhang, D. Wang, F. Liu, H. Wu, G. Pan, H. Wu, Z. Hao, H. Zhang and J. Zhang. Minimizing Bond Angle Distortion to Improve Thermal Stability of Cr3+ Doped Near-Infrared Phosphor[J]. Laser and Photonics Reviews,2023,17(9).
APA	L. Zhang, D. Wang, F. Liu, H. Wu, G. Pan, H. Wu, Z. Hao, H. Zhang and J. Zhang.(2023).Minimizing Bond Angle Distortion to Improve Thermal Stability of Cr3+ Doped Near-Infrared Phosphor.Laser and Photonics Reviews,17(9).
MLA	L. Zhang, D. Wang, F. Liu, H. Wu, G. Pan, H. Wu, Z. Hao, H. Zhang and J. Zhang."Minimizing Bond Angle Distortion to Improve Thermal Stability of Cr3+ Doped Near-Infrared Phosphor".Laser and Photonics Reviews 17.9(2023).

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