Issue 40, 2012
From the journal:

Journal of Materials Chemistry

High-performance dye-sensitized solar cells based on PEDOT nanofibers as an efficient catalytic counter electrode

Tae Hyun Lee,a   Kwangseok Do,b   Young Woo Lee,a   Sang Soo Jeon,c   Chulwoo Kim,b   Jaejung Kob  and  Seung Soon Im*a  

* Corresponding authors

a Department of Organic and Nano Engineering, Hanyang University, Seoul 133-791, Republic of Korea
E-mail: imss007@hanyang.ac.kr
Fax: +82-2-2297-5859

b Department of Advanced Material Chemistry, Korea University, Jochiwon, Chungnam 339-700, Republic of Korea
E-mail: jko@korea.ac.kr
Fax: +82-41-867-5396

c Advanced Functional Materials Research Team, Automotive R&D Division, Hyundai Motor Company, Jangduk-dong, Hwaseong-si, Gyeonggi-do, Republic of Korea

Abstract

Poly(3,4-ethylenedioxythiophene) nanofibers (PEDOT-NFs) with 10–50 nm diameters and high electrical conductivity (up to 83 S cm−1) have been fabricated chemically within micelles composed of sodium dodecyl sulfate (SDS) as nanoreactors. Dimethyl sulfoxide (DMSO, 5 wt%) was added to a methanol-based colloidal dispersion containing PEDOT-NFs to improve dispersibility. The dye-sensitized solar cells (DSSCs) using PEDOT-NFs as a counter electrode (CE) with low surface resistance and a highly porous surface exhibited enhanced power conversion efficiency (9.2%) compared to bulk PEDOT (6.8%). To date, PEDOT-NFs have shown the highest performance among CEs using PEDOT. It also surpassed the efficiency of platinum (Pt) CEs (8.6%). Electrochemical characterization, such as cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), showed that PEDOT-NFs efficiently reduced triiodide due to the enhanced electrical and morphological properties, which contributed to the high current density (17.5 mA cm−2) and fill factor (72.6%).

Graphical abstract: High-performance dye-sensitized solar cells based on PEDOT nanofibers as an efficient catalytic counter electrode

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Article information

DOI
https://doi.org/10.1039/C2JM34807A
Article type
Paper
Submitted
20 Jul 2012
Accepted
29 Aug 2012
First published
29 Aug 2012

J. Mater. Chem., 2012,22, 21624-21629

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High-performance dye-sensitized solar cells based on PEDOT nanofibers as an efficient catalytic counter electrode

T. H. Lee, K. Do, Y. W. Lee, S. S. Jeon, C. Kim, J. Ko and S. S. Im, J. Mater. Chem., 2012, 22, 21624 DOI: 10.1039/C2JM34807A

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