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Recombination dynamics in ZnO nanowires: Surfaces states versus mode quality factor

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In this work, we investigate the influence of finite size on the recombinations dynamics of ZnO nanowires. We demonstrate that diameter as well as lenght of nanowires determine the lifetime of the neutral donor bound excitons. Our findings suggest that while the length is mainly responsible for different mode quality factors of the cavity-like nanowires, the diameter determines the influence of surface states as alternative recombinations channels for the optical modes trapped in the nanocavity. In addition, comparing nanowires grown using different catalyst we show that the surfaces states strongly depend on each precursor characteristics.

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(c) American Institute of Physics , 2010

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Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)

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Recombination dynamics in ZnO nanowires: Surfaces states versus mode quality factor