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Issue 24, 2016
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Aqueous p-type dye-sensitized solar cells based on a tris(1,2-diaminoethane)cobalt(II)/(III) redox mediator

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Abstract

For the first time, we report the assembly of p-type dye-sensitized solar cells (pDSCs) based on an aqueous electrolyte containing a tris(1,2-diaminoethane)cobalt(II/III) ([Co(en)3]2+/3+) redox couple. With exception of devices made with pH 8.15 electrolytes (η = 1.13%) constant energy conversion efficiencies close to 1.5% were achieved with all other electrolytes under simulated one sun illumination (AM 1.5 G), with the best cell achieving an efficiency of 1.6%. Even higher efficiencies (≥1.9%) were achieved at a lower light intensity indicating that mass transport may be limiting performance at higher light intensities. The drop in VOC with increasing pH is compensated by improvements in the short circuit current and fill factor. Notably, the efficiencies reported here for electrolytes with pH > 9 are higher than those reported for the corresponding devices made with an organic electrolyte based on the same redox mediator.

Graphical abstract: Aqueous p-type dye-sensitized solar cells based on a tris(1,2-diaminoethane)cobalt(ii)/(iii) redox mediator

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Publication details

The article was received on 22 Jul 2016, accepted on 13 Oct 2016 and first published on 13 Oct 2016


Article type: Paper
DOI: 10.1039/C6GC02001A
Citation: Green Chem., 2016,18, 6659-6665
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    Aqueous p-type dye-sensitized solar cells based on a tris(1,2-diaminoethane)cobalt(II)/(III) redox mediator

    W. Xiang, J. Marlow, P. Bäuerle, U. Bach and L. Spiccia, Green Chem., 2016, 18, 6659
    DOI: 10.1039/C6GC02001A

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