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

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 ban...

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Veröffentlicht in:Applied physics letters 2008-01, Vol.92 (1), p.011103-011103-3
Hauptverfasser: Richters, Jan-Peter, Voss, Tobias, Wischmeier, Lars, Rückmann, Ilja, Gutowski, Jürgen
Format: Artikel
Sprache:eng
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Zusammenfassung: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.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2829598