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Remote Control and Noninvasive Detection Enabled by a High-performance NIR pc-LED.

Pengcheng Luo1,2, Dashuai Sun2, Zeyu Lyu2

  • 1Laboratory of Rare Earths, Chinese Academy of Sciences, Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, P. R. China.

Inorganic Chemistry
|January 22, 2024
PubMed
Summary
This summary is machine-generated.

A new near-infrared phosphor, CaLu2ZrScAl3O12:Cr3+ (CLZSA:Cr3+), offers efficient broadband emission for near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs). This material demonstrates excellent thermal stability and high output power for applications like remote control.

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Area of Science:

  • Materials Science
  • Solid-State Lighting
  • Photonics

Background:

  • Near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) are advanced light sources due to their high power, cost-effectiveness, and portability.
  • NIR phosphors are essential components for NIR pc-LED performance.

Purpose of the Study:

  • To report a novel blue light excitable NIR phosphor, CaLu2ZrScAl3O12:Cr3+ (CLZSA:Cr3+), for efficient broadband NIR emission.
  • To evaluate the performance of CLZSA:Cr3+ in NIR pc-LED devices for practical applications.

Main Methods:

  • Synthesis and characterization of the CLZSA:Cr3+ phosphor.
  • Measurement of its photoluminescence properties, including emission spectrum and thermal stability.
  • Fabrication and testing of an NIR pc-LED device utilizing the CLZSA:Cr3+ phosphor.

Main Results:

  • The CLZSA:Cr3+ phosphor exhibits intense broadband NIR emission peaking at 776 nm with a 140 nm full width at half-maximum (fwhm).
  • The phosphor shows remarkable thermal stability, retaining 80% of its emission intensity at 423 K.
  • The fabricated NIR pc-LED achieved a high output power of 68.4 mW at 100 mA with a photoelectric conversion efficiency of 23.0%.

Conclusions:

  • The novel CLZSA:Cr3+ phosphor is a highly efficient broadband NIR emitter suitable for NIR pc-LEDs.
  • The developed NIR pc-LEDs demonstrate excellent performance for applications such as remote control and non-invasive detection.