The Photoluminescence Decay of the 2.2 eV-Emission Band in KTaO<SUB>3</SUB> Single Crystal

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  • Yamaichi Eiji
    Department of Physics, School of Science and Engineering, Waseda University
  • Watanabe Koichi
    Department of Physics, School of Science and Engineering, Waseda University
  • Ohi Kikuo
    Department of Physics, School of Science and Engineering, Waseda University

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  • The Photoluminescence Decay of the 2.2eV-Emission Band in KTaO3 Single Crystal
  • Photoluminescence Decay of the 2.2eV Em

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Abstract

The decay of the 2.2 eV emission band in KTaO3 single crystal was measured using an N2 laser. The decay of the 2.2 eV emission band at low temperature is in good agreement with that of the 2.6 eV emission band. However, the decay of the 2.2 eV emission band differs from that of the 2.6 eV emission band above 70 K. The decay kinetics of the 2.2 eV emission band is explained by the theory of the recombination of holes trapped on two classes of acceptors and electrons trapped on one class of donors.

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