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Poly(3‐hexylthiophene) Nanorods with Aligned Chain Orientation for Organic Photovoltaics
Author(s) -
Kim Jong Soo,
Park Yunmin,
Lee Dong Yun,
Lee Ji Hwang,
Park Jong Hwan,
Kim Jin Kon,
Cho Kilwon
Publication year - 2010
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200901760
Subject(s) - materials science , nanorod , indium tin oxide , organic solar cell , acceptor , photoluminescence , optoelectronics , quenching (fluorescence) , substrate (aquarium) , nanotechnology , bilayer , thin film , chemical engineering , polymer , composite material , optics , fluorescence , oceanography , physics , engineering , condensed matter physics , membrane , geology , biology , genetics
A structured polymer solar cell architecture featuring a large interface between donor and acceptor with connecting paths to the respective electrodes is explored. To this end, poly‐(3‐hexylthiophene) (P3HT) nanorods oriented perpendicularly to indium tin oxide (ITO) glass are fabricated using an anodic aluminum oxide template. It is found that the P3HT chains in bulk films or nanorods are oriented differently; perpendicular or parallel to the ITO substrate, respectively. Such chain alignment of the P3HT nanorods enhanced the electrical conductivity up to tenfold compared with planar P3HT films. Furthermore, the donor/acceptor contact area could be maximised using P3HT nanorods as donor and C60 as acceptor. In a photovoltaic device employing this structure, remarkable photoluminescence quenching (88%) and a seven‐fold efficiency increase (relative to a device with a planar bilayer) are achieved.