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Trivalent lanthanides in fluoride or phosphate materials exhibit persistent luminescence after X-ray exposure. This phenomenon, observed from 200 nm to 1.7 µm, opens avenues for novel applications.

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Area of Science:

  • Materials Science
  • Solid-State Chemistry
  • Luminescence

Background:

  • Persistent luminescence (PersL) materials store energy and emit light long after excitation.
  • Trivalent lanthanide ions (Ln³⁺) are key dopants in developing advanced luminescent materials.

Purpose of the Study:

  • To review the mechanisms behind persistent luminescence in lanthanide-doped wide bandgap materials.
  • To explore potential applications of this X-ray-activated luminescence.

Main Methods:

  • Review of existing literature on persistent luminescence in Ln³⁺-doped fluoride and phosphate hosts.
  • Analysis of luminescence spectra and decay curves after X-ray irradiation.

Main Results:

  • Trivalent lanthanides in wide bandgap fluoride or phosphate hosts exhibit persistent luminescence.
  • The emission range spans from 200 nm to 1.7 µm.
  • Mechanisms involve energy storage and release following X-ray excitation.

Conclusions:

  • X-ray-activated persistent luminescence in lanthanide-doped materials is a viable phenomenon.
  • The broad emission spectrum suggests diverse application possibilities.
  • Further research can optimize materials for specific uses.