Luminescent properties of ytterbium ions in strontium haloborates

Abstract

The luminescence e properit4se of ytterbium ions in strongtium haloborates were studied under optical, x-ray and synchrotron excitation. The emission spectra of Sr2(1-x)Yb5O9R consists of a blue and a UV band. The former is due to 4f135d yields 4f14 transtions on the Yb2+ ions. The latter is tentatively assigned to charge transfer luminescence of Yb3+ ions. The influence of the structural features of Sr2B5O9R and some preparative conditions on the luminescent behavior of Yb ions is discussed.