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Platinum/polyaniline transparent counter electrodes for quasi-solid dye-sensitized solar cells with electrospun PVDF-HFP/TiO2 membrane electrolyte.
- Source :
-
Electrochimica Acta . Aug2013, Vol. 105, p447-454. 8p. - Publication Year :
- 2013
-
Abstract
- 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-co-hexafluoropropylene)/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 1.5μgcm−2. Electrocatalytic activity of the Pt/PANI electrode with 1.5μgcm−2 Pt loading for the I3 −/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 400–800nm. The optimal QDSC composed of Pt/PANI with 1.5μgcm−2 Pt loading exhibits power conversion efficiencies of 6.34% and 3.85%, when measured using an AM1.5G solar simulator at 100mWcm−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 8.3μgcm−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. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00134686
- Volume :
- 105
- Database :
- Academic Search Index
- Journal :
- Electrochimica Acta
- Publication Type :
- Academic Journal
- Accession number :
- 89310886
- Full Text :
- https://doi.org/10.1016/j.electacta.2013.04.177