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Area of Science:

  • Materials Science
  • Solid State Physics
  • Luminescence

Background:

  • Persistent luminescent materials are crucial for applications like security signage, bio-imaging, and data storage.
  • Current evaluations focus on emission spectra, decay curves, and luminescence duration.
  • Understanding temperature dependence is vital for practical applications.

Purpose of the Study:

  • To investigate temperature-dependent persistent luminescence in known phosphors.
  • To correlate persistent luminescence with thermoluminescence properties.
  • To propose and validate the concept of an optimum working temperature for persistent phosphors.

Main Methods:

  • Experimental investigation of persistent luminescence and thermoluminescence.
  • Analysis of temperature-dependent afterglow decay and glow curves.
  • Simulations of thermoluminescence and afterglow characteristics.

Main Results:

  • A clear relationship was found between the efficient temperature range of afterglow and the thermoluminescence glow curve.
  • The study demonstrates that persistent luminescence is significantly influenced by temperature.
  • Simulations support the experimental findings on temperature effects.

Conclusions:

  • The concept of optimum working temperature offers a new evaluation method for persistent phosphors.
  • This criterion can guide the selection of materials for specific operating environments.
  • Temperature-dependent analysis is essential for optimizing persistent luminescent material performance.