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. 2015 Dec;10(1):1015.
doi: 10.1186/s11671-015-1015-z. Epub 2015 Aug 14.

Efficient Dye-Sensitized Solar Cells Made from High Catalytic Ability of Polypyrrole@Platinum Counter Electrode

Xingping Ma  1 , Gentian Yue, Jihuai Wu, Zhang Lan
Affiliations

Efficient Dye-Sensitized Solar Cells Made from High Catalytic Ability of Polypyrrole@Platinum Counter Electrode

Xingping Ma et al. Nanoscale Res Lett. 2015 Dec.

Abstract

Polypyrrole@platinum (PPy@Pt) composite film was successfully synthesized by using a one-step electrochemical method and served as counter electrode (CE) for efficient dye-sensitized solar cells (DSSCs). The PPy@Pt CE with one-dimensional structure exhibited excellent electrocatalytic activity and superior charge transfer resistance for I(-)/I3 (-) electrolyte after being the cyclic voltammetry and electrochemical impedance spectroscopy tested. The photocurrent-photovoltage curves were further used to calculate the theoretical photoelectric performance parameters of the DSSCs. The DSSC based on the PPy@Pt CE achieved a remarkable power conversion efficiency of 7.35 %, higher about 19.9 % than that of conventional Pt CE (6.13 %). This strategy provides a new opportunity for fabricating low-cost and highly efficient DSSCs.

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Figures

Fig. 1
Fig. 1
Cyclic voltammograms for the PPy@Pt coated on FTO substrate with scan rate of 30 mV·s−1 (a); the SEM images of PPy (b) and PPy@Pt hybrid electrode (c, d)
Fig. 2
Fig. 2
Cyclic voltammograms and EIS. CVs of the Pt, PPy, and PPy@Pt CEs at scan rate of 50 mV·s−1 (a); the stability of the PPy@Pt CE for 40-cycle CVs (b); CVs for the PPy@Pt electrode with different scan rates and the redox peaks current versus square root of scan rates (c); EIS of the Pt, PPy, and PPy@Pt CEs for I−/I3 − redox couple (d)
Fig. 3
Fig. 3
J-V characteristics of the DSSCs fabricated with the Pt, PPy, and PPy@Pt CEs under the standard illumination (a, b)
See this image and copyright information in PMC

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