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Issue 32, 2014
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Chlorine-free processed high performance organic solar cells

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Abstract

The processing of polymer solar cells with non-halogenated solvents is highly desirable in order to achieve an environmentally friendly, sustainable large-scale fabrication of organic photovoltaics. This work demonstrates device processing free of chlorinated solvents yielding high-performance polymer:fullerene bulk-heterojunction solar cells comprising a conjugated polymer poly{[4,8-bis-(2-ethyl-hexyl-thiophene-5-yl)-benzo[1,2-b:4,5-b0]dithiophene-2,6-diyl]-alt-[2-(20-ethyl-hexanoyl)-thieno[3,4-b]thiophen-4,6-diyl]} (PBDTTT-CT) and a fullerene derivative [6,6]-phenyl-C70-butyric acid methyl ester (PC70BM). As compared to chlorobenzene/ortho-dichlorobenzene cast devices the overall solar cell performance could be improved from 6.71% up to 7.15% by using xylene-based solvent systems.

Graphical abstract: Chlorine-free processed high performance organic solar cells

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Publication details

The article was received on 28 Feb 2014, accepted on 26 Mar 2014 and first published on 26 Mar 2014


Article type: Paper
DOI: 10.1039/C4RA01783H
Citation: RSC Adv., 2014,4, 16681-16685
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    Chlorine-free processed high performance organic solar cells

    O. Synooka, K.-R. Eberhardt and H. Hoppe, RSC Adv., 2014, 4, 16681
    DOI: 10.1039/C4RA01783H

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