Impedance Spectroscopy on Polymer-Fullerene Solar Cells

Impedance Spectroscopy on Polymer-Fullerene Solar Cells

Impedance spectroscopy is used for studying the electrical transport properties of bulk heterojunction solar cells. A replacement circuit is needed to translate the frequency response of the circuit to the individual interfaces and layers of the solar cell. As a material combination and device archi...

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Bibliographic Details
Published in:Zeitschrift für Naturforschung. A, A journal of physical sciences Vol. 62; no. 9; pp. 490 - 494
Main Authors: Knipper, Martin, Parisi, Jürgen, Coakley, Kevin, Waldauf, Christoph, Brabec, Christoph J., Dyakonov, Vladimir
Format: Journal Article
Language:English
Published: Verlag der Zeitschrift für Naturforschung 01-09-2007
Subjects:
Bulk Heterojunction
Equivalent Circuit
Impedance Spectroscopy
Organic Solar Cells
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Summary:Impedance spectroscopy is used for studying the electrical transport properties of bulk heterojunction solar cells. A replacement circuit is needed to translate the frequency response of the circuit to the individual interfaces and layers of the solar cell. As a material combination and device architecture, composites of P3HT and PCBM, sandwiched between a transparent ITO front electrode and an aluminum back electrode, as well as a polymer buffer layer were investigated. By varying the film thickness we identified an equivalent circuit capable to fit our experimental data. We found a dielectric constant for the P3HT and for the P3HT:PCBM bulk.
ISSN:0932-0784
1865-7109
DOI:10.1515/zna-2007-0904