Solution-processed boron subphthalocyanine derivatives as acceptors for organic bulk-heterojunction solar cells

B. Ebenhoch, N.B.A. Prasetya, V.M. Rotello, G. Cooke, I.D.W. Samuel

Research output: Contribution to journalArticlepeer-review

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Abstract

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.
Original languageEnglish
Pages (from-to)7345-7352
Number of pages8
JournalJournal of Materials Chemistry A
Volume3
Issue number14
Early online date5 Mar 2015
DOIs
Publication statusPublished - 14 Apr 2015

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