Increasing the Open Circuit Voltage of Bulk-Heterojunction Solar Cells by Raising the LUMO Level of the Acceptor
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- 25 January 2007
- journal article
- research article
- Published by American Chemical Society (ACS) in Organic Letters
- Vol. 9 (4), 551-554
- https://doi.org/10.1021/ol062666p
Abstract
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.Keywords
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