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On the luminescence of rare-earth activated bismuth tungstates

descriptionPublicationkeyboard_double_arrow_right Article 01 Apr 1982 English Publisher:Elsevier BVJournal:Journal of Solid State Chemistry, volume 42, pages 163-169 (issn: 0022-4596,

Authors: G.J. Dirksen; G. Blasse;

doi: 10.1016/0022-4596(82)90263-8

On the luminescence of rare-earth activated bismuth tungstates

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Abstract

Abstract The luminescence properties of rare-earth activated bismuth tungstates with general formula Bi 2− x − y La x RE y WO 6 ( RE = Pr, Sm, Eu, Tb, Dy, Er) are described. The quantum efficiency of the tungstate luminescence is low, even at 4.2 K. Energy transfer from the tungstate group to certain rare-earth ions can compete successfully with the nonradiative processes in the tungstate group, so that the total quantum efficiency is considerably increased. A lower limit for the value of the transfer probability is 10 8 sec −1 .

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