Abstracts 2004

Abstract of Publication No. 471

Christine Reinhard, Pascal Gerner, Fernando Rodríguez, Sara García-Revilla, Rafael Valiente and Hans U. Güdel
Near-infrared to green photon upconversion in Mn2+ and Yb3+ doped lattices
Chem. Phys. Lett. 386, 132-136 (2004)      Full Text (PDF)      DOI-Link     

Abstract: Yb3+ excitation in the near-infrared around 1 mm leads to green Mn2+ 4T1   6A1 luminescence in CaZnF4:Mn2+; Yb3+, Zn2SiO4:Mn2+; Yb3+ and SrZnCl4:Mn2+; Yb3+ at 15 K. In the former two compounds the green upconversion (UC) luminescence is visible by eye up to room temperature. In Cs3MnBr5:Mn2+; Yb3+ no UC luminescence is observed. The UC mechanism consists of a sequence of ground-state absorption and excited-state absorption steps. The UC efficiency at 15 K is of the order of 1% for laser excitation with 130 mW (f=53 mm focusing lens).

Last modified: 13.12.11 by Gabriela Frei