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Open AccessArticle

Scale-Up of the Electrodeposition of ZnO/Eosin Y Hybrid Thin Films for the Fabrication of Flexible Dye-Sensitized Solar Cell Modules

1
Institute of Physical Chemistry and Electrochemistry, Leibniz University Hannover, Callinstr. 3a, 30167 Hannover, Germany
2
Application Center for Wood Fiber Research HOFZET®, Fraunhofer Institute for Wood Research, Wilhelm-Klauditz-Institute WKI, Heisterbergallee 10A, 30453 Hannover, Germany
3
Friemann & Wolf Batterietechnik GmbH, Industriestr. 22, 63654 Büdingen, Germany
4
Institute of Chemistry, Chemical Technology 1, Carl von Ossietzky University Oldenburg, Carl-von-Ossietzky-Str. 9-11, 26129 Oldenburg, Germany
*
Author to whom correspondence should be addressed.
Materials 2018, 11(2), 232; https://doi.org/10.3390/ma11020232
Received: 28 December 2017 / Revised: 25 January 2018 / Accepted: 29 January 2018 / Published: 2 February 2018
(This article belongs to the Special Issue Zinc Oxide Nanostructures: Synthesis and Characterization)
The low-temperature fabrication of flexible ZnO photo-anodes for dye-sensitized solar cells (DSSCs) by templated electrochemical deposition of films was performed in an enlarged and technical simplified deposition setup to demonstrate the feasibility of the scale-up of the deposition process. After extraction of eosin Y (EY) from the initially deposited ZnO/EY hybrid films, mesoporous ZnO films with an area of about 40 cm2 were reproducibly obtained on fluorine doped tin oxide (FTO)-glass as well as flexible indium tin oxide (ITO)–polyethylenterephthalate (PET) substrates. With a film thickness of up to 9 µm and a high specific surface area of up to about 77 m2·cm−3 the ZnO films on the flexible substrates show suitable properties for DSSCs. Operative flexible DSSC modules proved the suitability of the ZnO films for use as DSSC photo-anodes. Under a low light intensity of about 0.007 sun these modules achieved decent performance parameters with conversion efficiencies of up to 2.58%. With rising light intensity the performance parameters deteriorated, leading to conversion efficiencies below 1% at light intensities above 0.5 sun. The poor performance of the modules under high light intensities can be attributed to their high series resistances. View Full-Text
Keywords: electrochemical deposition; scale-up; zinc oxide; eosin Y; dye-sensitized solar cell; solar module electrochemical deposition; scale-up; zinc oxide; eosin Y; dye-sensitized solar cell; solar module
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MDPI and ACS Style

Bittner, F.; Oekermann, T.; Wark, M. Scale-Up of the Electrodeposition of ZnO/Eosin Y Hybrid Thin Films for the Fabrication of Flexible Dye-Sensitized Solar Cell Modules. Materials 2018, 11, 232.

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