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Donor–Acceptor Alternating Copolymer Nanowires for Highly Efficient Organic Solar Cells
Author(s) -
Lee Jaewon,
Jo Sae Byeok,
Kim Min,
Kim Heung Gyu,
Shin Jisoo,
Kim Haena,
Cho Kilwon
Publication year - 2014
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201401203
Subject(s) - materials science , nanowire , photoactive layer , energy conversion efficiency , organic solar cell , polymer solar cell , hybrid solar cell , copolymer , acceptor , solar cell , nanotechnology , polymer , optoelectronics , chemical engineering , composite material , physics , condensed matter physics , engineering
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.