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Title: Platinum/polyaniline transparent counter electrodes for quasi-solid dye-sensitized solar cells with electrospun PVDF-HFP/TiO2 membrane electrolyte
Authors: Peng, S.
Li, L.
Tan, H.
Srinivasan, M.
Mhaisalkar, S.G.
Ramakrishna, S. 
Yan, Q.
Keywords: Counter electrode
Pt/polyaniline hybrid
Quasi-solid dye-sensitized solar cell
Issue Date: 2013
Citation: Peng, S., Li, L., Tan, H., Srinivasan, M., Mhaisalkar, S.G., Ramakrishna, S., Yan, Q. (2013). Platinum/polyaniline transparent counter electrodes for quasi-solid dye-sensitized solar cells with electrospun PVDF-HFP/TiO2 membrane electrolyte. Electrochimica Acta 105 : 447-454. ScholarBank@NUS Repository.
Abstract: Composite films of platinum and polyaniline (Pt/PANI) with different Pt loadings are prepared by chemical reduction and then a spin-coating process on fluorine-doped tin oxide (FTO) substrates. The obtained Pt/PANI transparent counter electrodes are applied in quasi-solid dye-sensitized solar cells (QDSCs) from front and rear light illuminations, using electrospun poly(vinylidenefluoride-cohexafluoropropylene)/ TiO2 (PVDF-HFP/TiO2) as the electrolyte. The analytical results show that the 1.8-nm sized Pt nanoparticles are distributed uniformly in the Pt/PANI film when the Pt loading is 1.5 μg cm-2. Electrocatalytic activity of the Pt/PANI electrode with 1.5 μg cm-2 Pt loading for the I 3 -/I- redox reaction is higher than the conventional sputtered Pt electrode. Furthermore, the mean optical transmittance of the Pt/PANI electrodes is above 60% in the wavelength of 400-800 nm. The optimal QDSC composed of Pt/PANI with 1.5 μg cm-2 Pt loading exhibits power conversion efficiencies of 6.34% and 3.85%, when measured using an AM1.5G solar simulator at 100 mW cm-2 under front and rear light illuminations. The efficiencies are both higher than those of the QDSCs employing the conventional sputtered Pt counter electrode with 8.3 μg cm -2 Pt loading. Moreover, the QDSC exhibits superior long-term stability. These promising results make the potential application of Pt/PANI films as cost-effective, transparent counter electrodes. © 2013 Elsevier Ltd. All rights reserved.
Source Title: Electrochimica Acta
ISSN: 00134686
DOI: 10.1016/j.electacta.2013.04.177
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