Abstract
The spectral properties of LaVO4, GdVO4 andLuVO4 crystalsdoped with Ce3+, Pr3+, Eu3+ or Tb3+ have been investigated in order to determine the position of the energy levels relative to thevalence and conduction bands of the hosts along the trivalent and divalent lanthanide series.Pr3+ and Tb3+ ground state levels are positioned based on the electron transfer energy from those states tothe conduction band, the so-called intervalence charge transfer (IVCT). This approach iscompared with an alternative model that is based on electron transfer from the valenceband to a lanthanide.
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