Spherical polypyrrole nanoparticles as a highly efficient counter electrode for dye-sensitized solar cells
- Authors
- Jeon, Sang Soo; Kim, Chulwoo; Ko, Jaejung; Im, Seung Soon
- Issue Date
- 2011
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- JOURNAL OF MATERIALS CHEMISTRY, v.21, no.22, pp.8146 - 8151
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF MATERIALS CHEMISTRY
- Volume
- 21
- Number
- 22
- Start Page
- 8146
- End Page
- 8151
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/114943
- DOI
- 10.1039/c1jm10112a
- ISSN
- 0959-9428
- Abstract
- Discrete spherical polypyrrole (PPy) nanoparticles with a uniform diameter of similar to 85 nm and electrical conductivity of similar to 10 S cm(-1) were fabricated by chemical oxidative polymerization within micelles composed of myristyl trimethyl ammonium bromide (MTAB) and decyl alcohol as the nanoreactors. A methanol-based colloidal dispersion containing 5 wt% PPy was dropcast directly onto fluorine-doped tin oxide (FTO) glass to use as counter electrodes (CEs) in dye-sensitized solar cells (DSSCs). The surface resistivity of the PPy layer on the FTO glass decreased from 624 to 387 U sq(-1) after post-doping with concentrated HCl vapor for 1 min. The DSSCs made of PPy/FTO and HCl-doped PPy/FTO CEs exhibited power conversion efficiencies of similar to 5.28 and similar to 6.83%, respectively under standard AM 1.5 sunlight illumination. The post-doped and highly oxidized PPy allowed the electrons to move into the PPy layer readily and facilitated the electrocatalytic reaction of the I-3(-)/I- redox couple, giving enhanced cell performance. Moreover, the cell efficiency was enhanced to similar to 7.73% with further fine tuning of the electrolyte composition, which is comparable to the value (similar to 8.2%) using conventional Pt CEs.
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Collections - College of Science and Technology > Department of Advanced Materials Chemistry > 1. Journal Articles
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