Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 20, Issue 48, Pages 10919-10923Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0jm02296a
Keywords
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Funding
- Korean Government (MEST) [NRF-2009-C1AAA001-2009-0092950]
- NCRC [R15-2008-006-02001-0]
- Korea Ministry of Knowledge Economy (MKE) [2008-N-PV08-P-01]
- MEST [R31-20008-000-10026-0]
- BioImaging Research Center at GIST
- Heeger Center for Advanced Materials (HCAM)
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Controlling the morphology in bulk-heterojunction solar cells is the preferred and most effective way to achieve high efficiency. To control the morphology, we synthesized a novel hydrophobic end-functionalized P3HT to induce hydrophilic-hydrophobic repulsive interactions in the boundary between the relatively hydrophilic PCBM and the relatively hydrophobic P3HT. The introduction of hydrophobic end-functionalized P3HT (F-P3HT) leads to larger PCBM clusters, while maintaining the crystallinity of P3HT due to repulsive interactions. F-P3HT thus provides a maximized continuous interfacial area between the donor and the acceptor as well as bi-continuous networks of donor and acceptor domains, resulting in better percolation pathways for charge transport.
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