標題: | Effects of mesoscopic poly (3,4-ethylenedioxythiophene) films as counter electrodes for dye-sensitized solar cells |
作者: | Lee, Kun-Mu Chiu, Wei-Hao Wei, Hung-Yu Hu, Chih-Wei Suryanarayanan, Vembu Hsieh, Weng-Feng Ho, Kuo-Chuan 光電工程學系 Department of Photonics |
關鍵字: | Conducting polymer;Dye-sensitized solar cells;Counter electrode;Poly(3,4-ethylenedioxythiophene);Carbon nanotubes |
公開日期: | 1-一月-2010 |
摘要: | Counter electrode coated with chemically polymerized poly(3,4-ethylenedioxythiophene) (PEDOT) in a dye-sensitized solar cell (DSSC) was studied. The surface morphology and the nature of I(-)/I(3)(-) redox reaction based on PEDOT film were investigated using Atomic Force Microscopy and Cyclic Voltammetry, respectively. The performance of the DSSCs containing the PEDOT coated electrode was compared with sputtered-Pt electrode. We found that the root mean square roughness decreases and conductivity increases as the molar ratio of imidazole (Im)/EDOT in the PEDOT film increases. The DSSC containing the PEDOT coated on fluorine doped tin oxide glass with Im/EDOT molar ratio of 2.0, showed a conversion efficiency of 7.44% compared to that with sputtered-Pt electrode (7.77%). The high photocurrents were attributed to the large effective Surface area of the electrode material resulting in good catalytic properties for T(3) reduction. Therefore, the incorporation of a multi-walled carbon nanotube (MWCNT) in the PEDOT film, coated on various substrates was also investigated. The DSSC containing the PEDOT films with 0.6 wt.% of MWCNT on stainless steel as counter electrode had the best cell performance of 8.08% with short-circuit current density, open-circuit voltage and fill factor of 17.00 mA cm(-2), 720 mV and 0.66, respectively. (C) 2009 Elsevier B.V. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.tsf.2009.11.058 http://hdl.handle.net/11536/6017 |
ISSN: | 0040-6090 |
DOI: | 10.1016/j.tsf.2009.11.058 |
期刊: | THIN SOLID FILMS |
Volume: | 518 |
Issue: | 6 |
起始頁: | 1716 |
結束頁: | 1721 |
顯示於類別: | 期刊論文 |