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Performance improvement of polymer solar cells by using a solvent-treated poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) buffer layer
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Figures

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FIG. 1.

(a) Chemical structure of PEDOT:PSS, ethanol, and 2-propanol and (b) the device structure of the PSC.

Image of FIG. 2.

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FIG. 2.

(a) curves and (b) EQE plots of the PSCs based on P3HT/PCBM under illumination of AM 1.5G, .

Image of FIG. 3.

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FIG. 3.

Transmittance of the ITO electrodes with PEDOT:PSS film spin-coated from PEDOT:PSS aqueous solution (4083), 4083 with addition of 200% ethanol, and 4083 with addition of 200% 2-propanol.

Image of FIG. 4.

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FIG. 4.

AFM topographic images of PEDOT:PSS films (a) without organic solvent treatment, (b) with ethanol treatment, and (c) with 2-propanol treatment.

Tables

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Table I.

Conductivity, roughness, and photovoltaic performance of the devices with and without the organic solvent treatment.

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/content/aip/journal/apl/98/24/10.1063/1.3600665
2011-06-16
2014-04-23

Abstract

Photovoltaic performance of the polymersolar cell (PSC) based on poly(3-hexylthiophene) (P3HT) as donor and [6,6]-phenyl--butyric acid methyl ester (PCBM) as acceptor was improved by using the poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) modification layer treated by ethanol or 2-propanol. Power conversion efficiency (PCE) of the PSC based on P3HT:PCBM (1:1, w/w) with the 2-propanol-treated PEDOT:PSS modification layer reached 4.74%, in comparison with a PCE of 3.39% for the PSC with the PEDOT:PSS layer without the organic solvent treatment. The enhanced performance of the PSCs is attributed to higher conductivity and optimized surface morphology of the PEDOT:PSS layers treated by the organic solvent.

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Scitation: Performance improvement of polymer solar cells by using a solvent-treated poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) buffer layer
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/24/10.1063/1.3600665
10.1063/1.3600665
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