Impedance spectroscopy on organic bulk‐heterojunction solar cells | Zendy

Glatthaar M. | Zendy; Mingirulli N. | Zendy; Zimmermann B. | Zendy; Ziegler T. | Zendy; Kern R. | Zendy; Niggemann M. | Zendy; Hinsch A. | Zendy; Gombert A. | Zendy

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Impedance spectroscopy on organic bulk‐heterojunction solar cells

Author(s) -

Glatthaar M.,

Mingirulli N.,

Zimmermann B.,

Ziegler T.,

Kern R.,

Niggemann M.,

Hinsch A.,

Gombert A.

Publication year - 2005

Publication title -

physica status solidi (a)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.532

H-Index - 104

eISSN - 1862-6319

pISSN - 1862-6300

DOI - 10.1002/pssa.200521149

Subject(s) - dielectric spectroscopy , heterojunction , electrical impedance , materials science , biasing , organic semiconductor , aluminium , spectral line , conductivity , optoelectronics , reverse bias , organic solar cell , polymer solar cell , analytical chemistry (journal) , voltage , electrode , chemistry , solar cell , composite material , polymer , electrical engineering , organic chemistry , physics , electrochemistry , diode , astronomy , engineering

We measured the electrical impedance spectra of organic bulk‐heterojunction solar cells based on an absorber blend of poly(3‐hexylthiophene) and [6,6]‐phenyl C 61 ‐butyric acid methyl ester. Comparing the spectra of the non‐treated device and after two consecutive treatments with applied forward bias voltage at 110 °C, we observed a region in the semiconductor with a low conductivity, which was expanding after the treatments. We concluded that this region is a depletion region at the aluminium contact. This was confirmed by the bias dependence of the impedance spectra. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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