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Influence of polymer coating on the low-temperature photoluminescence properties of ZnO nanowires

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5 Author(s)
Richters, Jan-Peter ; Institute of Solid State Physics, University of Bremen, Otto-Hahn-Allee 1, D-28359 Bremen, Germany ; Voss, Tobias ; Wischmeier, Lars ; Ruckmann, Ilja
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We report on low temperature photoluminescence studies of ZnO nanowires embedded in different polymers. Comparing the spectra of as-grown and embedded ZnO nanowires, we find a decrease of the deep-level emission and an increase of the near band-edge emission after the embedding process. The near band-edge emission of the embedded ZnO nanowires is dominated by a surface exciton band. The observed effects are independent of the selected polymer. The decrease of the deep-level emission scales with the balling abilities of the different polymers. We propose a model to explain the spectral changes.

Published in:

Applied Physics Letters  (Volume:92 ,  Issue: 1 )