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Berlin 2008 – scientific programme

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DS: Fachverband Dünne Schichten

DS 30: Layer Properties: Electrical, Optical and Mechanical Properties

DS 30.3: Talk

Thursday, February 28, 2008, 10:00–10:15, H 2032

Charge transport in nanoparticulate Zinc Oxide layers — •Simon Bubel1, Donna Nikolova1, Koshi Okamura1, Norman Mechau1, Roland Schmechel2, and Horst Hahn11Forschungszentrum Karlsruhe, Institute of Nanotechnology — 2Universität Duisburg-Essen, Institute for Nano Structures and Technology

The electrical characteristics of thin layers of nanoparticulate zinc oxide (NP-ZnO) were investigated by four-point–, current-voltage measurements and transient current experiments. Layers have been spin-coated from dispersion of NP-ZnO in isopropanol (iPrOH). The current injection from thermal evaporated metal electrodes of gold and aluminium was found to be ohmic. Accordingly, the influence of electrodes to the considered electrical characteristics of the nanoparticulate thin film could be neglected which enabled the application of space-charge limited current models. Therefore the potential gradient in the sample has been calculated and fitted to experimental data. The electrical properties observed were found in close agreement with the theory of traps distributed in energy.

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