Berlin 2012 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 6: Poster: Structural Ordering and Electronic Transport (joint focus with HL)

CPP 6.4: Poster

Montag, 26. März 2012, 17:30–19:30, Poster A

Influence of different organic ligands on the charge transport and charge transfer characteristics of CuInS2/polymer hybrid mixtures — •Christopher Krause, Nikolay Radychev, Florian Witt, Marta Kruszynska, Dorothea Scheunemann, Joanna Kolny-Olesiak, Holger Borchert, and Jürgen Parisi — University of Oldenburg, Department of Physics, Energy and Semiconductor Research Laboratory, 26111 Oldenburg

CuInS2 (CIS) nanoparticles embedded into a conductive polymer are a promising candidate for hybrid photovoltaic application due to unique features of the CIS nanomaterials. One of the key problems of the hybrid solar cells functionality is the creation of an efficient bulk heterojunction itself. In most cases, nanoparticles in the polymer matrix have to be stabilized by organic ligands, which can impede efficient charge transport through the hybrid blends as well as charge separation at the polymer/nanoparticle interface. Therefore an exchange of the initial ligand is required and might significantly improve the performance of semiconductor nanoparticle based hybrid solar cells. In the present work, the influence of different organic ligands on the charge transport in CIS and CIS/polymer blends is investigated by current-voltage measurements in a device geometry similar to solar cells and compared to mobility measurements in organic field-effect transistors (OFETs). Additionally, the charge transfer process at the donor/acceptor interface is studied by electron spin resonance.