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Issue 1, 2011
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Aqueous soft matter based photovoltaic devices

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We present a new type of photovoltaic systems based on aqueous soft gel materials. Two photosensitive ions, DAS and [Ru(bpy)3]2+, were used as photoactive molecules embedded in aqueous gel. The hydrogel photovoltaic devices (HGPVs) showed performance comparable with or higher than those of other biomimetic or ionic photovoltaic systems reported recently. We suggest a provisional mechanism, which is based on a synergetic effect of the two dye molecules in photocurrent generation. We found an efficient replacement of the expensive Pt counter-electrode with copper coated with carbon materials, such as carbon nanotubes, carbon black or graphite. These Cu electrodes coated with carbon layers could drastically reduce the cost of such hydrogel devices without efficiency loss. Thus, a new class of low cost and flexible photovoltaic cells made of biocompatible matrix was demonstrated. Biologically derived photoactive molecules, such as Chlorophyll and Photosystem II, were successfully operated in aqueous gel media of such HGPVs.

Graphical abstract: Aqueous soft matter based photovoltaic devices

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Publication details

The article was received on 08 Jun 2010, accepted on 18 Aug 2010 and first published on 21 Sep 2010

Article type: Paper
DOI: 10.1039/C0JM01820A
Citation: J. Mater. Chem., 2011,21, 72-79
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    Aqueous soft matter based photovoltaic devices

    H. Koo, S. T. Chang, J. M. Slocik, R. R. Naik and O. D. Velev, J. Mater. Chem., 2011, 21, 72
    DOI: 10.1039/C0JM01820A

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