Correlation between charge transfer exciton recombination and photocurrent in polymer/fullerene solar cells

Markus Hallermann, Enrico Da Como, Jochen Feldmann, Marta Izquierdo, Salvatore Filippone, Nazario Martin, Sabrina Juechter, Elizabeth von Hauff

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

We correlate carrier recombination via charge transfer excitons (CTEs) with the short circuit current, J sc, in polymer/fullerene solar cells. Near infrared photoluminescence spectroscopy of CTE in three blends differing for the fullerene acceptor, gives unique insights into solar cell characteristics. The energetic position of the CTE is directly correlated with the open-circuit voltage, V oc, and more important J sc decreases with increasing CTE emission intensity. CTE emission intensity is discussed from the perspective of blend morphology. The work points out the fundamental role of CTE recombination and how optical spectroscopy can be used to derive information on solar cell performances.
Original languageEnglish
Article number023301
JournalApplied Physics Letters
Volume97
Issue number2
DOIs
Publication statusPublished - 12 Jul 2010

Keywords

  • gallium compounds
  • III-V semiconductors
  • light emitting diodes
  • nanolithography
  • nanopatterning
  • sapphire
  • semiconductor epitaxial layers
  • soft lithography
  • substrates
  • wide band gap semiconductors

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