Abstracts 2003

Abstract of Publication No. 448

Annina Aebischer, Oliver S. Wenger and Hans U. Güdel
Near-infrared to visible photon up-conversion in V3+, Re4+ co-doped Cs2NaYCl6
J. Lumin. 102-103, 48-53 (2003)      Full Text (PDF)      DOI-Link     

Abstract: Cs2NaYCl6 co-doped with V3+ and Re4+ was studied by optical absorption and luminescence spectroscopy. In the cubic host lattice both dopant ions substitute for the octahedrally coordinated Y3+. Visible by eye red up-conversion luminescence centered around 14000cm1 is observed upon near-infrared excitation within the energy range from 10000 to 12000cm1 between 15 and 300K. For V3+ 3T2g excitation at 11350cm1, the efficiency of this up-conversion process increases with increasing temperature. An energy transfer step from V3+ to Re4+ followed by an energy transfer up-conversion process on the Re4+ system is shown to be the likely mechanism responsible for this phenomenon.

Last modified: 13.12.11 by Gabriela Frei