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Researchers developed new persistent luminescence materials using Gd3+-mediated cluster traps. These materials enable bright, tunable multicolor emission for advanced optical technologies like displays and medical imaging.

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Area of Science:

  • Materials Science
  • Solid-State Chemistry
  • Luminescence

Background:

  • Persistent luminescence (PL) materials offer unique advantages for applications like night-vision displays and medical diagnostics.
  • A key challenge is achieving efficient multicolor emission (violet, yellow, red) within a single, scalable host material.

Purpose of the Study:

  • To overcome the limitations in multicolor PL materials by developing a novel host-activator system.
  • To enable bright and spectrally tunable persistent luminescence for advanced optical technologies.

Main Methods:

  • Construction of Gd3+-mediated cluster traps within alkaline-earth fluorochlorides.
  • Incorporation of various activators (Eu2+, Sm2+, Tb3+, Mn2+) into the host matrix.
  • Investigation of energy transfer mechanisms and luminescence properties upon X-ray irradiation.

Main Results:

  • Gd3+-mediated clusters act as intrinsic emitters and energy transfer platforms, minimizing energy loss.
  • Achieved bright and spectrally tunable multicolor persistent luminescence.
  • Eu2+ PL intensity enhanced up to 32.7-fold with Gd3+ codoping.
  • Demonstrated violet PL for exciting quantum dots in dynamic displays and Sm2+ emission for X-ray imaging.

Conclusions:

  • Established a generalizable strategy for designing efficient multicolor persistent materials.
  • The developed materials show promise for multifunctional optical applications, including advanced displays and low-dose medical imaging.