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Solvent mixtures for improving device efficiency of polymer photovoltaic devices
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Figures

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FIG. 1.

curves of the polymer solar cells fabricated from various solvent mixtures. The measurement was performed under illumination at (simulated AM1.5G).

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FIG. 2.

The characteristics of the hole-only devices measured in the dark. The bias was corrected for the build-in potential , which is , owing to the difference in the work functions between the two electrodes. The inset shows the device structure of the hole-only devices. The thickness of was .

Image of FIG. 3.

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FIG. 3.

(a) Absorption spectra for P3HT:PCBM films fabricated from various solvent mixtures. (b) The AFM image, showing the surface morphology of the P3HT/PCBM blend films, deposited from neat DCB (rms ). (c) The AFM image of the polymer blend deposited from a 5% Cl-naph solvent mixture (rms ).

Image of FIG. 4.

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FIG. 4.

GIXRD spectra for P3HT/PCBM films deposited from different solvent mixtures.

Tables

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Table I.

The performance of polymer solar cells made from different solvent mixtures under illumination with AM1.5G spectra .

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/content/aip/journal/apl/92/10/10.1063/1.2898153
2008-03-14
2014-04-24

Abstract

In this work, we used solvent mixtures, consisting of 1-chloronaphthalene (Cl-naph), one solvent with a high boiling point, and -dichlorobenzene, to prepare the polymer films for polymerphotovoltaic devices. Because of the lower vapor pressure of the solvent mixtures, the polymer films dried slower. With higher Cl-naph concentration in the organic solvent, the polymer chains had longer time to self-organize themselves. As a result, the higher degree of crystalline led to lower device series resistance, thereby increasing the performance of the photovoltaic devices.

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Scitation: Solvent mixtures for improving device efficiency of polymer photovoltaic devices
http://aip.metastore.ingenta.com/content/aip/journal/apl/92/10/10.1063/1.2898153
10.1063/1.2898153
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