Regensburg 2016 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 26: Poster session II

MM 26.18: Poster

Dienstag, 8. März 2016, 18:30–20:30, Poster B3

Electrical Conduction in Thin Layers of ZnO Nanoparticles, Studied Under Various Conditions — •Moses Richter, Johannes C. Voll, Gebhard J. Matt, Michael Salvador, and Christoph J. Brabec — i-MEET, Friedrich-Alexander-Universität Erlangen-Nürnberg, Martensstraße 7, 91058 Erlangen, Germany

Solution cast thin layers of nanoparticles are important to many novel printed electronics, e.g. organic solar cells, organic LEDs and OFETs. However, stable ink formulations require the use of stabilizing ligands, which strongly influence the electrical conduction in the dried layer, hence the device performance. The limiting conduction mechanism in aforementioned layers is identified in low temperature experiments as a Poole-Frenkel limited transport. By in-situ UV-light treatments under various atmospheric conditions, the responsible defects could be correlated to the particle surfaces. The actual electronic change in UV-light treated ZnO layers is further evaluated by Kelvin Probe-AFM scans and the influence on organic solar cell performance. In latter it turned out to improve the long time stability and maximal achievable performance.