Regensburg 2004 – wissenschaftliches Programm

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SYOH: Organic and Hybrid Systems for Future Electronics

SYOH 5: Poster

SYOH 5.53: Poster

Donnerstag, 11. März 2004, 18:00–21:00, B

Dielectric spectroscopy of the photovoltaic cell formed by di-(pyridyl)-perylenetetracarboxylic diimide and copper phthalocyanine — •Grazyna Jarosz¹, Ryszard Signerski², Jan Godlewski², Paul David Quinn¹, Niels Stephan¹, and Ludwig Brehmer¹ — ¹Condensed Matter Physics, Institute of Physics, University — ²Department of Applied Physics and Mathematics, Gdansk

Dielectric spectroscopy is one of the major techniques applied in the investigation of Schottky barriers or p-n junctions due to dielectric phenomena which arise between metal-semiconductor and semiconductor-semiconductor interfaces. Indeed, it provides us with important information such as the depletion-layer capacitance, the diffusion capacitance and the series and parallel resistance which are particularly important in the investigation of the various processes determining the DC response of a device. However, in the case of organic solar cells this method has been not widely applied despite the increasing interest in these types of devices. Our work will present dielectric spectra of organic heterojunctions formed by di-(pyridyl)-perylenetetracarboxylic diimide (Py-PTC) and copper phthalocyanine (CuPc). This organic junction exhibits a photovoltaic effect with effective photogeneration of charge carriers occuring near the Py-PTC/CuPc interface. The main processes determining the heterojunction performance will be discussed. Acknowledgement: The work was supported by Marie-Curie Host Fellowships: Project MODERN No.HPMD-CT-2001-00083 and by KBN: Project No.4T11B 057 22.