Ultrathin polypyrrole nanosheets doped with HCl as counter electrodes in dye-sensitized solar cells
- Authors
- Hwang, Dong Ki; Song, Donghoon; Jeon, Sang Soo; Han, Tae Hee; Kang, Yong Soo; Im, Seung Soon
- Issue Date
- Jan-2014
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- JOURNAL OF MATERIALS CHEMISTRY A, v.2, no.3, pp.859 - 865
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF MATERIALS CHEMISTRY A
- Volume
- 2
- Number
- 3
- Start Page
- 859
- End Page
- 865
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/26573
- DOI
- 10.1039/c3ta13367b
- ISSN
- 2050-7488
- 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.
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