Increasing the open circuit voltage of bulk-heterojunction solar cells by raising the LUMO level of the acceptor

Floris B. Kooistra, Joop Knol, Fredrik Kastenberg, Lacramioara M. Popescu, Wiljan J. H. Verhees, Jan M. Kroon, Jan C. Hummelen*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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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.

Original languageEnglish
Pages (from-to)551-554
Number of pages4
JournalOrganic letters
Volume9
Issue number4
DOIs
Publication statusPublished - 15-Feb-2007

Keywords

  • PHOTOINDUCED ELECTRON-TRANSFER
  • POLYMER PHOTOVOLTAIC CELLS
  • EFFICIENCY
  • PERFORMANCE
  • BLENDS

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