Ultrathin polypyrrole nanosheets doped with HCl as counter electrodes in dye-sensitized solar cells
- Title
- Ultrathin polypyrrole nanosheets doped with HCl as counter electrodes in dye-sensitized solar cells
- Author
- 한태희
- Keywords
- Chemical oxidation; Conductive oxides; Counter electrodes; Dye-Sensitized solar cell; Dye-sensitized solar cells; Organic single crystals; Power conversion efficiencies; Tafel polarization; Catalyst activity; Electrodes; Nanosheets; Photoelectrochemical cells; Platinum; Polypyrroles; Single crystals; Vapors; Solar cells
- Issue Date
- 2014-01
- Publisher
- AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
- Citation
- Journal of Materials Chemistry A, Vol. 2, No.3, 21 January 2014, Pages 859-865
- 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. ⓒ 2014 The Royal Society of Chemistry.
- URI
- http://pubs.rsc.org/en/content/articlepdf/2014/ta/c3ta13367bhttp://hdl.handle.net/20.500.11754/47471
- ISSN
- 2050-7488
- DOI
- 10.1039/c3ta13367b
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ORGANIC AND NANO ENGINEERING(유기나노공학과) > Articles
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