Concentration quenching of photoluminescence. The case of F3+ and F2 color centers in LiF

G. Baldacchini, F. Menchini, R.M. Montereali

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The relative emission efficiency of F3+ and F2 centers as a function of their concentration has been investigated in LiF crystals colored at room temperature and -60°C with 3 MeV electrons. From a careful study of their absorption and emission spectra, we discovered that the emission efficiency η of both F3+ and F2 defects is constant up to ∼ 1016 centers/cm3. When increasing the concentration up to 1018 centers/cm3, η decreases slightly for the F2 centers and considerably for the F3+ ones, a difference which is bigger at room temperature with respect to liquid nitrogen temperature. A thermally activated process is taking place, where the F2 center and other aggregated defects play an important role.
Original languageEnglish
Pages (from-to)-
JournalJournal of the Electrochemical Society
Issue number5
Publication statusPublished - May 2003


All Science Journal Classification (ASJC) codes

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

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