Fast luminescence in ZnO structures

Larisa Grigorjeva 1Aleksandr Kalinko 1Donats Millers 1Claude J. Monty 2Adam M. Presz 3Janis Grabis 4

1. Institute of Solid State Physics, University of Latvia, 8 Kengaraga, Riga LV-1063, Latvia
2. CNRS laboratoire Procedes, Materiaux et Energie solaire (PROMES), BP5 Odeillo, Font-Romeu 66120, France
3. Polish Academy of Sciences, Institute of High Pressure Physics (UNIPRESS), Sokolowska 29/37, Warszawa 01-142, Poland
4. Riga Technical University, Miera 34, Riga, Latvia

Abstract

The results of the photo- and cathodoluminescence studies in ZnO nanopowders and ceramics were reported. The luminescence due to exciton annihilation was studied in undoped and Al, Co, Eu doped ZnO nanopowders obtained by sol-gel, microwave-driven hydrothermal, plasma synthesis methods and vaporization-condensation in Solar reactor. Luminescence depends on nanopowder morphology. The results of luminescence studies were compared with those obtained for commercial ZnO powder. The ZnO ceramics was sintered from different raw powders. The grain size of obtained ceramics was estimated from SEM images. The luminescence properties of ceramics obtained with different sintering parameters was studied. The decay times and light yield was analyzed. It is shown that fast scintillating ceramics will be prepared from nanostructured raw material.

 

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Presentation: Poster at E-MRS Fall Meeting 2007, Acta Materialia Gold Medal Workshop, by Larisa Grigorjeva
See On-line Journal of E-MRS Fall Meeting 2007

Submitted: 2007-05-15 16:32
Revised:   2009-06-07 00:44