Nano Science and Technology Institute
Nanotech 2010 Vol. 1
Nanotech 2010 Vol. 1
Nanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites
Chapter 1: Nanoscale Materials Characterization

Effects of Non-radiative energy transfer processes on the visible upconversion in ZrO2:Yb3+/Er3+ nanocrystals

Authors:O. Meza, L.A. Diaz-Torres, P. Salas, E. De la Rosa, C.D. Solis
Affilation:Centro de Investigaciones en Optica A C, MX
Pages:75 - 78
Keywords:upconversion, nanocrystals, Ytterbium, Erbium, Zirconium Oxide
Abstract:The luminescence dynamics of both near infrared (NIR) and visible (VIS) emission of Yb3+,Er3+ in nanocrystalline ZrO2 is studied. It is found that upconversion emission is dominated by back transfer processes over direct Yb to Er energy transfer processes. A microscopic rate equation model was developed to fit both NIR and VIS fluorescence decay trends simultaneously, and to quantify the different interaction parameters responsible of the involved energy transfer processes. The microscopic model takes into account the crystalline phase as well as the size of nanocrystals.
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