Imaging the electric potential within organic solar cells

Rebecca Saive*, Michael Scherer, Christian Mueller, Dominik Daume, Janusz Schinke, Michael Kroeger, Wolfgang Kowalsky

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

32 Citations (Scopus)

Abstract

The charge transport in organic solar cells is investigated by surface potential measurements via scanning Kelvin probe microscopy. Access to the solar cell's cross-section is gained by milling holes with a focused ion beam which enables the direct scan along the charge transport path. In a study of poly(3-hexylthiophene):1-(3-methoxycarbonyl)propyl-1-phenyl[6,6]C61 (P3HT:PCBM) bulk heterojunction solar cells, the open circuit voltage is built up at the top contact. A comparison of the potential distribution within normal and inverted solar cells under operation exhibits strongly different behaviors, which can be assigned to a difference in interface properties.

Original languageEnglish
Pages (from-to)5854-5860
Number of pages7
JournalAdvanced functional materials
Volume23
Issue number47
DOIs
Publication statusPublished - 17 Dec 2013
Externally publishedYes

Keywords

  • bulk heterojunction
  • charge transport
  • focused ion beam
  • organic electronics
  • solar cells

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    Saive, R., Scherer, M., Mueller, C., Daume, D., Schinke, J., Kroeger, M., & Kowalsky, W. (2013). Imaging the electric potential within organic solar cells. Advanced functional materials, 23(47), 5854-5860. https://doi.org/10.1002/adfm.201301315