Regensburg 2010 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 62: Poster II: Photovoltaics and Organic Semiconductors

HL 62.15: Poster

Thursday, March 25, 2010, 18:00–20:00, Poster D2

From organic single carrier diodes to bulk heterojunction solar cells: an electrical characterization by impedance spectroscopy — •Bernhard Ecker, Elizabeth von Hauff, and Jürgen Parisi — Energy and Semiconductor Research Laboratory, Institute of Physics, University of Oldenburg, 26129 Oldenburg, Germany

Impedance spectroscopy is a widely used and powerful tool for investigating electrical characteristics on the frequency scale of batteries, fuel cells and solar cells. For new materials and novel devices impedance spectroscopy can be used to gain information about material parameters as well as interface characteristics. We aim to understand polymer-fullerene bulk heterojunction solar cells using this method. In this study we first investigate single carrier diodes consisting of P3HT or PCBM to supply the understanding of the P3HT:PCBM heterojunction, which is a promising candidate for highly efficient organic solar cells. The characterization of the materials gives insight to the dielectric behavior and provides understanding of the resistive and capacitive response of the devices. Here we present results from impedance spectroscopy measurements on the single carrier devices.