Luminescence and decay kinetics of Pb2+ center in LiCaAlF6 single crystal host

Jan Pejchal, Eva Mihokova, Martin Nikl, Andrey Novoselov, Akira Yoshikawa

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The Pb-doped LiCaAlF6 single crystals were grown using the micro-pulling-down method. The temperature dependences of photoluminescence characteristics were studied to reveal the kinetic processes in the excited state of Pb2+ luminescence center. A simple three-level phenomenological model applied to the decay time temperature dependences shows that energy separation between the metastable 3P0 and the radiative 3P1 states of Pb2+ center is relatively high, about 180 meV (∼1470 cm-1). Induced absorption spectrum after UV illumination at 500 K points to slight ionization of the Pb2+ excited state and creation of the color F-center with an absorption peak located around 260 nm.

Original languageEnglish
Pages (from-to)1673-1677
Number of pages5
JournalOptical Materials
Volume31
Issue number11
DOIs
Publication statusPublished - 2009 Sep

Keywords

  • Doping
  • Micro-pulling-down
  • Neutron detectors
  • Scintillator materials

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Computer Science(all)
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrical and Electronic Engineering

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