Journal
ORGANIC LETTERS
Volume 9, Issue 4, Pages 551-554Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol062666p
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We report the synthesis, characterization, and electrochemical properties of ten new fullerene derivatives for usage in organic solar cells. The phenyl ring of PCBM was substituted with electron-donating and electron-withdrawing substituents to study their influence on the LUMO level of the parent fullerene. We varied the LUMO level over a range of 86 mV and show a small but significant change of the open circuit voltage upon application in MDMO-PPV:methanofullerene bulk-heterojunction photovoltaic cells.
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