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Deep-trap ultraviolet persistent phosphor for advanced optical storage application in bright environments.

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Researchers developed a novel ultraviolet storage phosphor, ScBO3:Bi3+, for rewritable optical data storage. This material offers intense, long-lasting deep UV emission and controllable readout, overcoming limitations of existing storage phosphors.

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Area of Science:

  • Materials Science
  • Solid-State Chemistry
  • Optoelectronics

Background:

  • Visible-light and infrared-light storage phosphors are used for optical data storage in dark environments.
  • A scarcity exists for storage phosphors emitting in the deep ultraviolet (200-300 nm) spectral region.

Purpose of the Study:

  • To report a novel deep-trap ultraviolet storage phosphor, ScBO3:Bi3+.
  • To investigate its X-ray energy storage capabilities and deep ultraviolet luminescence properties.
  • To explore its potential for advanced optical storage applications.

Main Methods:

  • Synthesis and characterization of ScBO3:Bi3+ phosphor.
  • X-ray irradiation and persistent luminescence measurements under various stimuli (light, heat).
  • Experimental and theoretical investigations of defect levels and trap dynamics.
  • Demonstration of controllable optical information readout.

Main Results:

  • ScBO3:Bi3+ exhibits ultra-narrowband deep ultraviolet emission centered at 299 nm (FWHM 0.21 eV).
  • The phosphor shows excellent X-ray energy storage and intense, long-lasting luminescence upon optical or thermal stimulation.
  • Oxygen vacancies and Scandium interstitials act as deep electron traps, enhancing luminescence.
  • Controllable optical information readout was successfully demonstrated.

Conclusions:

  • ScBO3:Bi3+ is a promising deep-trap ultraviolet storage phosphor with unique spectral features and trap distribution.
  • Its ability to provide intense, long-lasting UV emission and controllable readout makes it suitable for advanced optical storage, even in bright environments.