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Proceedings Paper

Photocurrent spectra of bilayers and blends of the organic donor-acceptor system CuPc/C60
Author(s): Thomas Stuebinger; Wolfgang Bruetting
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Paper Abstract

Photocurrent spectra and quantum efficiency are investigated in photovoltaic cells with the electron donor material Cu-phthalocyanine (CuPc) together with C60 as electron acceptor material. By a systematic variation of both layer thicknesses in bilayer devices with the main process of photocurrent generation at the donor-acceptor interface we found a significant influence on photocurrent generation due to optical interference effects and determined the optimum layer thicknesses for both materials. The effective dissociation interface is increased by introducing a 1:1 blend of both materials between the pure CuPc and C60 layers. The more extended active volume of exciton dissociation leads to higher quantum efficiencies (IPCE up to approximately equals 22%) of the photovoltaic effect in comparison to the heterojunction bilayer devices.

Paper Details

Date Published: 21 February 2002
PDF: 11 pages
Proc. SPIE 4465, Organic Photovoltaics II, (21 February 2002); doi: 10.1117/12.456929
Show Author Affiliations
Thomas Stuebinger, Univ. Bayreuth (Germany)
Wolfgang Bruetting, Univ. Bayreuth (Germany)

Published in SPIE Proceedings Vol. 4465:
Organic Photovoltaics II
Zakya H. Kafafi; Denis Fichou, Editor(s)

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