Berlin 2008 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 30: Layer Properties: Electrical, Optical and Mechanical Properties
DS 30.3: Vortrag
Donnerstag, 28. Februar 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 Hahn1 — 1Forschungszentrum 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.