Improving the electronic properties of the organic-metal interface is important for developing high-performance polymer solar cells. In this hot paper two methanol-soluble fullerene surfactants are reported. These form interfacial layers for cathodes in polymer solar cells and significantly enhance open-circuit voltage and photocurrent generation. Bulk heterojunction solar cells developed using these surfactant-modified cathodes offer high power conversion efficiencies of up to 6.63%. Read the article for free until 7th June.
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