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Issue 22, 2012
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Self-assembly of carboxylated polythiophene nanowires for improved bulk heterojunction morphology in polymer solar cells

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Abstract

Conjugated regioregular poly[3-(5-carboxypentyl) thiophene-2,5-diyl] (P3CPenT), a derivative of poly(3-hexylthiophene) (P3HT), is introduced as a hole transport layer (HTL) for P3HT:PCBM plastic solar cells (PSCs). P3CPenT, a carboxyl-functionalized polythiophene, is insoluble in solvents typically used in the preparation of photoactive layers such as chloroform, chlorobenzene and dichlorobenzene, allowing successive processing of the photoactive layer without dissolution of the HTL. P3CPenT self-assembles into nanowires in DMSO solution and when cast as a film, reduces concentration gradients of P3HT:PCBM photoactive layers. P3HT:PCBM PSCs incorporating P3CPenT nanowires as the HTL have a higher fill factor (FF, 0.67) and power conversion efficiency (PCE, 3.7%) than devices with conventional PEDOT:PSS HTLs.

Graphical abstract: Self-assembly of carboxylated polythiophene nanowires for improved bulk heterojunction morphology in polymer solar cells

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Publication details

The article was received on 30 Jan 2012, accepted on 15 Apr 2012 and first published on 18 Apr 2012


Article type: Paper
DOI: 10.1039/C2JM30576C
Citation: J. Mater. Chem., 2012,22, 11354-11363
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    Self-assembly of carboxylated polythiophene nanowires for improved bulk heterojunction morphology in polymer solar cells

    W. Li, B. J. Worfolk, P. Li, T. C. Hauger, K. D. Harris and J. M. Buriak, J. Mater. Chem., 2012, 22, 11354
    DOI: 10.1039/C2JM30576C

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