Donor–Acceptor Alternating Copolymer Nanowires for Highly Efficient Organic Solar Cells

POLYTHIOPHENE SOLVENT ADDITIVES RECOMBINATION self-assembly 02 engineering and technology AGGREGATION PERFORMANCE 01 natural sciences 7. Clean energy 0104 chemical sciences polymer materials nanowires MOBILITY solar cells CHARGE-TRANSPORT MORPHOLOGY FIELD-EFFECT TRANSISTORS 0210 nano-technology CONJUGATED POLYMERS
DOI: 10.1002/adma.201401203 Publication Date: 2014-07-30T07:15:25Z
ABSTRACT
A donor-acceptor conjugated copolymer enables the formation of nanowire systems that can be successfully introduced into bulk-heterojunction organic solar cells. A simple binary solvent mixture that makes polarity control possible allows kinetic control over the self-assembly of the crystalline polymer into a nanowire structure during the film-forming process. The enhanced photoconductivity of the nanowire-embedded photoactive layer efficiently facilitates photon harvesting in the solar cells. The resultant maximum power conversion efficiency is 8.2% in a conventional single-cell structure, revealing a 60% higher performance than in devices without nanowires.
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