Abstracts 2003

Abstract of Publication No. 452

Judith Grimm, Oliver S. Wenger and Hans U. Güdel
Broadband green upconversion luminescence of Ni2+ in KZnF3
J. Lumin. 102-103, 380-385 (2003)      Full Text (PDF)      DOI-Link     

Abstract: The upconversion properties of divalent nickel doped into KZnF3 are reported. By exciting into the 3T1g (3F) or 1Eg excited state of Ni2+ with monochromatic light, a broad green luminescence around 20,000cm1 is observed that originates in the 1T2g higher excited state. The upconversion is shown to be a single ion process, consisting of a sequential two-photon absorption. The green luminescence is observed at all temperatures between 15K and room temperature. This is strikingly different from what is observed in Ni2+ doped chloride and bromide materials in which the 1T2g3A2g luminescence is located in the red spectral range and is quenched well below room temperature.

Last modified: 13.12.11 by Gabriela Frei