Wavelength-sensitive energy storage in Sr3MgSi2O8:Eu2+,Dy3+

  • Mika Lastusaari
  • Adrie J. J. Bos
  • Pieter Dorenbos
  • Taneli Laamanen
  • Marja Malkamäki
  • Lucas C. V. Rodrigues
  • Jorma Hölsä
Article

Abstract

Optical energy storage materials can store energy when exposed to radiation and subsequently release it as light after thermal or optical stimulation. Such materials are thus employed in, e.g., detectors, dosimetry, self-lit signs, and imaging. In, e.g., dosimetry, the response of the material is correlated with the absorbed energy, but no distinction of different radiation energies can be achieved. In this work, Sr3MgSi2O8:Eu2+,Dy3+ was studied with thermoluminescence (TL) initiated by irradiating the material with photon energies between 2.6 (480) and 5.4 eV (230 nm). The TL glow curves revealed that the material has two main traps. Both the overall TL intensity and the TL intensity ratio between the two traps strongly depend on the photon energy of the irradiation. A mechanism of energy storage and charge carrier release in this material was constructed from the results obtained.

Keywords

Energy storage Persistent luminescence Sr3MgSi2O8 Europium Thermoluminescence XANES 

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2015

Authors and Affiliations

  • Mika Lastusaari
    • 1
    • 2
  • Adrie J. J. Bos
    • 3
  • Pieter Dorenbos
    • 3
  • Taneli Laamanen
    • 1
  • Marja Malkamäki
    • 1
  • Lucas C. V. Rodrigues
    • 1
    • 4
  • Jorma Hölsä
    • 1
    • 2
    • 4
  1. 1.Department of ChemistryUniversity of TurkuTurkuFinland
  2. 2.Turku University Centre for Materials and Surfaces (MatSurf)TurkuFinland
  3. 3.Faculty of Applied SciencesDelft University of TechnologyDelftThe Netherlands
  4. 4.Instituto de QuímicaUniversidade de São PauloSão Paulo-SPBrazil

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