Solution-processed boron subphthalocyanine derivatives as acceptors for organic bulk-heterojunction solar cells
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We report the fabrication of solution-processed bulk heterojunction devices from subphthalocyanine (SubPc) units as the acceptor component and conventional polymeric donor materials such as MEH-PPV, P3HT and PTB7. The high solubility of the SubPc derivatives facilitated the formation of efficient donor/acceptor networks and provided power conversion efficiencies of 0.4% with MEH-PPV, 1.1% with P3HT and 3.5% with PTB7. A clear contribution of photon harvesting by the acceptor was identified from the external quantum efficiency spectra. Analysis of the current-voltage characteristics and photoluminescence quenching revealed trap-assisted and geminate recombination as a loss mechanism. Our results show that solution-processable SubPcs are a promising alternative to fullerenes for polymer solar cells.
Ebenhoch , B , Prasetya , N B A , Rotello , V M , Cooke , G & Samuel , I D W 2015 , ' Solution-processed boron subphthalocyanine derivatives as acceptors for organic bulk-heterojunction solar cells ' Journal of Materials Chemistry A , vol 3 , no. 14 , pp. 7345-7352 . DOI: 10.1039/c5ta00715a
Journal of Materials Chemistry A
Copyright the Authors 2015. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (http://creativecommons.org/licenses/by/3.0/)
GC and IDWS thank the EPSRC for funding (Grant EP/I00243X). NBAP thanks Directorate General of Higher Education (DGHE) of Republic Indonesia for PhD Scholarship Grant (948/E4.4/K/2013). IDWS also acknowledges a Royal Society Wolfson Research Merit Award.