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Title: Size-dependent recombination dynamics in ZnO nanowires.
Author: Reparaz, J. S.
Güell Vilà, Frank
Wagner, M. R.
Hoffmann, A.
Cornet i Calveras, Albert
Morante i Lleonart, Joan Ramon
Keywords: Òxid de zinc
Ciència dels materials
Zinc oxide
Materials science
Issue Date: 2010
Publisher: American Institute of Physics
Abstract: A deep understanding of the recombination dynamics of ZnO nanowires NWs is a natural step for a precise design of on-demand nanostructures based on this material system. In this work we investigate the influence of finite-size on the recombination dynamics of the neutral bound exciton around 3.365 eV for ZnO NWs with different diameters. We demonstrate that the lifetime of this excitonic transition decreases with increasing the surface-to-volume ratio due to a surface induced recombination process. Furthermore, we have observed two broad transitions around 3.341 and 3.314 eV, which were identified as surface states by studying the dependence of their life time and intensitiy with the NWs dimensions.
Note: Reproducció del document publicat a:
It is part of: Applied Physics Letters, 2010, vol. 96, p. 053105-1-053105-3
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ISSN: 0003-6951
Appears in Collections:Articles publicats en revistes (Electrònica)

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