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Electronic properties of polyvinylpyrrolidone at the zinc oxide nanoparticle surface

PVP in ZnO dispersions and nanoparticulate ZnO thin films for thin film transistors

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Abstract

We investigated the electrical effects of polyvinylpyrrolidone (PVP), used as a dispersion agent in zinc oxide (ZnO) nanodispersions. We found PVP reduces the high surface conductivity and atmospheric sensitivity. Compared with polymer free ZnO thin films, the nanoparticulate layers with PVP exhibit a smaller density of thermally active charge carriers, a reduced density of trap states, and a Fermi level shift toward the valence band, yielding improved performance, vanishing hysteresis characteristics and reduced atmospheric sensitivity in thin film transistors (TFT). In addition, we discuss the attachment of PVP to the ZnO surface.

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Acknowledgements

The Dutch Polymer Institute (DPI), Netherlands is gratefully acknowledged for the financial support.

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Authors and Affiliations

  1. Faculty of Engineering and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, 47057, Duisburg, Germany

    Simon Bubel & Roland Schmechel

  2. Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany

    Norman Mechau

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Correspondence to Simon Bubel.

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Bubel, S., Mechau, N. & Schmechel, R. Electronic properties of polyvinylpyrrolidone at the zinc oxide nanoparticle surface. J Mater Sci 46, 7776–7783 (2011). https://doi.org/10.1007/s10853-011-5757-4

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