Platinum nanoparticle/self-doping polyaniline composite-based counter electrodes for dye-sensitized solar cells
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In this study, we developed a series of platinum nanoparticle (PtNP)/self-doping polyaniline (SPANI) composite-based counter electrodes for dye-sensitized solar cells (DSSCs). The SPANIs with nanospherical (S-SPANI) and nanotube (T-SPANI) structures were respectively self-assembled on the indium–tin oxide glass substrate via the in situ oxidation polymerization. The S-SPANI and T-SPANI were prepared by the copolymerization of self-doping monomer o-aminobenzenesulfonic acid and aniline in different molar ratios. The PtNP/SPANI composite-based counter electrodes were further prepared through the reduction of Pt ions on the SPANI layer using reduction agents of formic acid and sodium borohydride (NaBH4). The SPANI can serve as the proposed supports to disperse PtNPs. The particles sizes of formic acid-reduced nano-platinum (F-PtNPs; 5–15 nm) were smaller than those of the NaBH4-reduced nano-platinum (S-PtNPs; 15–25 nm). Moreover, the distribution of F-PtNPs on the surface of SPANIs was more uniform than that of the S-PtNPs on the surface of SPANIs. The effects of SPANI morphology and PtNP size/distribution on the electro-chemical behavior and photovoltaic performance of these PtNPs/SPANI counter electrodes-based DSSCs were studied. The highest short-circuit current density (14.87 mA cm−2), fill factor (64.2 %), and photoenergy conversion efficiency (4.77 %) were obtained for the DSSC based on the F-PtNP/S-SPANI counter electrode.
KeywordsDye-sensitized solar cell Platinum counter electrode Photovoltaic property
The authors thank the National Science Council of Taiwan, ROC, for financial support (Grant NSC 101-2221-E-005-012-MY3).
- Chen HS, Su C, Chen JL, Yang TY, Hsu NM, Li WR (2011) Preparation and characterization of pure rutile TiO2 nanoparticles for photocatalytic study and thin films for dye-sensitized solar cells. J Nanomater 2011:1–8Google Scholar
- Lee RH, Huang YW, Chang JW, Hwang JC, Chen YC, Jeng RJ (2011) Electrochemical impedance characterization and photovoltaic performance of N719 dye-sensitized solar cells using quaternized ammonium iodide containing polyfluorene electrolyte solutions. Polym Adv Technol 22:1650–1657CrossRefGoogle Scholar
- Nazeeruddin MK, Kay A, Rodicio I, Baker RH, Muller E, Liska P, Vlachopoulos N, Gratzel M (1993) Conversion of light to electricity by cis-X2bis(2,2′-bipyridyl-4,4′-dicarboxylate)ruthenium(II) charge-transfer sensitizers (X = C1−, Br−, I−, CN−, and SCN−) on nanocrystalline TiO2 electrodes. J Am Chem Soc 115:6382–6390CrossRefGoogle Scholar
- Nazeeruddin MK, Pechy P, Renouard T, Zakeeruddin SM, Baker RH, Comte P, Liska P, Cevey L, Costa E, Shklocer V, Spiccia L, Beacon GB, Bignozzi CA, Gratzel M (2001) Engineering of efficient panchromatic sensitizers for nanocrystalline TiO2-based solar cells. J Am Chem Soc 123:1613–1624CrossRefGoogle Scholar
- Yue J, Epstein AJ, MacDiarmid AG (1990) Sulfonic acid ring-substituted polyaniline, a self-doped conducting polymer. Mol Cryst Liq Cryst 189:255–261Google Scholar