Intrinsic and impurity cross-luminescence in three-component barium-containing compounds

Academic Article

Abstract

  • Time-resolved luminescence excitation spectra under synchrotron radiation (10-30 eV) excitation for the barium-containing compounds BaLn2F8 (Ln = Y, Tm, Yb), (BaF2)1-x (NdF3)x (x = 0.005-0.3) and SrF2Ba 2+ (0.1-1%) were investigated. It was shown that BaY2F8 crystals have fast cross-luminescence with an excitation threshold at hv = 19.3 eV and spectral characteristics similar to that of BaF2. By introducing in BaF2 rare-earth elements with unfilled 4f-shells the long luminescence of self-trapped excitons is suppressed, but fast cross-luminescence is suppressed as well. The existence of impurity cross-luminescence in SrF2Ba (excitation threshold at about 18.5 eV) was confirmed. Investigations of impurity cross-luminescence give information about the band structure of crystals which do not have intrinsic cross-luminescence. © 1991.
  • Authors

    Digital Object Identifier (doi)

    Author List

  • Aleksandrov YM; Kuusmann IL; Makhov VN; Mirov SB; Uvarova TV; Yakimenko MN
  • Start Page

  • 208
  • End Page

  • 210
  • Volume

  • 308
  • Issue

  • 1-2