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

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DOIResolve DOI: http://doi.org/10.1039/c2jm30576c
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TypeArticle
Journal titleJournal of Materials Chemistry
ISSN0959-9428
1364-5501
Volume22
Issue22
Pages1135411363
AbstractConjugated 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.
Publication date
LanguageEnglish
AffiliationNational Institute for Nanotechnology; National Research Council Canada
Peer reviewedYes
NPARC number21268949
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Record identifierb888a5dc-0e38-497a-be93-f7765bde6c33
Record created2013-11-27
Record modified2016-05-09
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