Rapid Nondestructive Detection Enabled by an Ultra-Broadband NIR pc-LED

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Hao Suo
  • Yu Wang
  • Xiaoqi Zhao
  • Leipeng Li
  • Kuiwen Guan
  • Wenge Ding
  • Panlai Li
  • Zhijun Wang

Detail(s)

Original languageEnglish
Article number2200012
Journal / PublicationLaser and Photonics Reviews
Volume16
Issue number7
Online published7 Apr 2022
Publication statusPublished - Jul 2022

Abstract

The rapid development of near-infrared (NIR) spectroscopic techniques has greatly stimulated the discovery of novel broadband NIR-emitting phosphors as advanced light sources. Herein, a novel double-perovskite phosphor La2MgHfO6:Cr3+/Yb3+ that displays ultra-broadband NIR emissions with a full-width at half maximum (FWHM) of 333 nm is reported. The remarkable luminescence property stems from the multiple crystallographic sites, relatively weak crystal field, and efficient Cr3-to-Yb3+ energy transfer (ET). The site occupation of Cr3+ is elaborately verified by the Rietveld refinement and first-principles calculation. By controlling the ET process, the internal/external quantum efficiency (IQE/EQE), bandwidth, and thermal stability of NIR emissions are substantially improved. The as-prepared phosphors are further integrated into a miniaturized NIR light-emitting diode (LED) package, demonstrating superior performance in rapid nondestructive detection of structural failure in thin electronic cables. The results described here provide a novel pointcut for designing broadband NIR-emitting phosphors with desired optical properties toward applications in industrial inspection and medical diagnosis.

Research Area(s)

  • broadband NIR emission, near-infrared, NIR pc-LEDs, nondestructive detection, phosphor

Citation Format(s)

Rapid Nondestructive Detection Enabled by an Ultra-Broadband NIR pc-LED. / Suo, Hao; Wang, Yu; Zhao, Xiaoqi et al.
In: Laser and Photonics Reviews, Vol. 16, No. 7, 2200012, 07.2022.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review