Dresden 2009 – scientific programme
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SYOP: Symposium Organic Photovoltaics: From Single Molecules to Devices
SYOP 4: Organic Photovoltaics: from Single Molecules to Devices
SYOP 4.52: Poster
Thursday, March 26, 2009, 16:30–19:00, P1A
Theoretical investigation of the competition between electron-hole generation and recombination effects in organic and hybrid organic-inorganic solar cells — •Benjamin A. Stickler1,2, Manfred Gruber1,2, Ferdinand Schürrer1, Gregor Trimmel2, and Karin Zojer1 — 1Department of Theoretical and Computational Physics, Graz University of Technology, Petersgasse 16, 8010 Graz, Austria — 2Christian Doppler Pilotlabor for Nanocomposite Solar Cells, Institute for Chemistry and Technology of Materials, Graz University of Technology
Electron-hole generation and recombination in bulk heterojunctions profoundly influence the performance of the solar cell, independent whether organic-organic or inorganic-organic heterojunctions are considered. In this work, a drift diffusion based transport model implemented in one as well as two dimensions was used to simulate these processes and to compute the corresponding I-V curves of the device. Furthermore, intensity-dependent exciton generation (via Lambert-Beer's law), exciton diffusion, and field- dependent dissociation into electrons and holes are considered.The influence of field-dependent carrier mobilities, recombination and generation models is discussed in terms of exciton, charge carrier, and electric field distribution.