Regensburg 2013 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 28: Poster Session: Graphen; Transport properties; Transport in high magnetic fields / Quantum Hall effect; Metal-semiconductor hybrid systems

HL 28.25: Poster

Monday, March 11, 2013, 16:00–20:00, Poster A

Application of CuInS₂ nanocrystals in hybrid and Schottky-type solar cells — •Katja Frevert, Florian Witt, Nikolay Radychev, Dorothea Scheunemann, Marta Kruszynska, Rany Miranti, Joanna Kolny-Olesiak, Holger Borchert, and Jürgen Parisi — University of Oldenburg, Department of Physics, Energy and Semiconductor Research Laboratory (EHF), 26111 Oldenburg, Germany

So called hybrid solar cells built from blends of conductive polymers and inorganic nanoparticles are a possible candidate to improve the performance of solution processed thin film photovoltaics. In most studies on this topic toxic nanoparticle compounds like CdSe or PbS are used. Here we demonstrate results with less toxic CuInS₂(CIS) nanocrystals. CIS offers advantages such as high absorption coefficients in the visible range, size-dependent spectral bandwidth, and suitable charge transport properties. We will show the influence of stabilizing ligands on the morphology of the active layer and the electrical characteristics of hybrid solar cells based on elongated and pyramidal CIS nanocrystals blended with poly(3-hexylthiophene) (P3HT). Another approach for solution processed photovoltaic devices involves all inorganic nanoparticle Schottky-type solar cells. Here thin films of CIS nanoparticles are deposited layer-by-layer and finished by a suitable top electrode like aluminum. We will show first results from an early stage of this development.