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Effect of increased surface area of stainless steel substrates on the efficiency of dye-sensitized solar cells
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Figures

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FIG. 1.

Schmatic of dye-coated electrode using roughened StSt substrate.

Image of FIG. 2.

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FIG. 2.

Cross-sectional STEM images of StSt substrates (a) before and (b) after roughening in a sulfuric acid bath at for .

Image of FIG. 3.

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FIG. 3.

AFM images of StSt surface (a) before and (b) after roughening process.

Image of FIG. 4.

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FIG. 4.

Under AM 1.5 irradiation with a xenon lamp. (a) curves of DSSC with nontreated StSt substrates and roughened StSt substrates. (b) Electrochemical impedance spectra measured at the frequency range of and fitting curves using an equivalent circuit model including three CPEs.

Tables

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Table I.

Estimated resistance from electrochemical impedance spectra using an equivalent circuit model shown in Fig. 4(b) .

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/content/aip/journal/apl/93/13/10.1063/1.2996017
2008-10-03
2014-04-24

Abstract

In order to increase the electrical contact area between particles and stainless steel (StSt) substrates of the dye-sensitized solar cells (DSSCs), StSt foil was roughened electrochemically using sulfuric acid with some additives. Compared with the DSSC with nontreated StSt substrate, DSSC with this roughened StSt substrate showed a 33% increase in light-to-electricity conversion efficiency with negligible effect on open circuit voltage and fill factor. Electrochemical impedance spectroscopy clearly confirmed that the increased performance was due to a decreased electrical resistance at the /StSt interface.

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Scitation: Effect of increased surface area of stainless steel substrates on the efficiency of dye-sensitized solar cells
http://aip.metastore.ingenta.com/content/aip/journal/apl/93/13/10.1063/1.2996017
10.1063/1.2996017
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