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Issue 3, 2014
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Ultrathin polypyrrole nanosheets doped with HCl as counter electrodes in dye-sensitized solar cells

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Abstract

Ultrathin polypyrrole nanosheets (UPNSs) were synthesized by chemical oxidation via organic single-crystal surface-induced polymerization (OCSP) using sodium decylsulfonate (SDSn) as a template. This process yields mass-producible, inexpensive materials that are suitable for flexible devices. UPNSs were deposited onto transparent, conductive oxide glasses for use as catalytic counter-electrodes (CEs) in dye-sensitized solar cells. These electrodes boast 94% transmittance against that of Pt CEs. Hydrochloric acid (HCl, 35 wt%), applied in the vapor state as a post-doping process, was used to improve the catalytic activity of the electrodes. This treatment enhanced the catalytic activity of UPNSs by increasing their conductivity by 8 S cm−1, with a 7.4% increase in the level of nitrogen doping. The Tafel polarization and impedance results support the enhancement of catalytic activity due to HCl doping. Dye-sensitized solar cells (DSSCs) employing the HCl-enhanced UPNS CEs showed a power conversion efficiency (AM 1.5, 100 mW cm−2) of 6.8%, which is 19.3% greater than the untreated case and comparable to that of Pt CE-based DSSCs.

Graphical abstract: Ultrathin polypyrrole nanosheets doped with HCl as counter electrodes in dye-sensitized solar cells

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Supplementary files

Article information


Submitted
25 Aug 2013
Accepted
07 Nov 2013
First published
08 Nov 2013

J. Mater. Chem. A, 2014,2, 859-865
Article type
Paper

Ultrathin polypyrrole nanosheets doped with HCl as counter electrodes in dye-sensitized solar cells

D. K. Hwang, D. Song, S. S. Jeon, T. H. Han, Y. S. Kang and S. S. Im, J. Mater. Chem. A, 2014, 2, 859
DOI: 10.1039/C3TA13367B

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