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Realizing Simultaneous UV and Visible Persistent Luminescence by Defect Engineering.

Yi Hu1, Yi Wang1, Hengwei Lin1

  • 1International Joint Research Center for Photo-Responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, 214122 Wuxi, China.

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This summary is machine-generated.

Researchers developed a novel UV-visible dual-band persistent luminescent material using defect-assisted dopant engineering. This breakthrough enables simultaneous ultraviolet and visible afterglow for advanced optical information technologies.

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Area of Science:

  • Materials Science
  • Optics
  • Solid-State Chemistry

Background:

  • Multiband persistent luminescent materials are crucial for advanced optical information technologies.
  • Existing systems are limited to visible and near-infrared regions, lacking ultraviolet (UV) afterglow.
  • Incorporating UV afterglow is challenging but offers advantages in concealment and background-free readout.

Purpose of the Study:

  • To develop a single-host material capable of simultaneous UV and visible persistent luminescence.
  • To engineer a defect-assisted dopant strategy for enhanced charge storage and controlled release.
  • To explore the potential for multichannel optical information storage and anticounterfeiting.

Main Methods:

  • Introduced Gadolinium (Gd3+) into a Calcium Fluoride (CaF2) host codoped with Terbium (Tb3+).
  • Utilized a defect-assisted dopant engineering strategy.
  • Investigated charge storage and release mechanisms via induced vacancy-related traps.

Main Results:

  • Achieved simultaneous UV and visible persistent luminescence within a single wide-bandgap fluoride host.
  • Gd3+ codoping created suitable vacancy-related traps for charge storage and release.
  • Demonstrated stable UV-visible dual-band afterglow with coexisting Gd3+-UV and Tb3+-visible emissions.

Conclusions:

  • Developed a feasible design strategy for incorporating UV emission into persistent luminescent systems.
  • The novel material enables selective access to UV and visible emissions for advanced applications.
  • This work promotes the development of multiband persistent luminescent materials across the UV to near-infrared spectrum.