Evidence of the improvement of photovoltaic efficiency by polar molecule orientation in a new semiconducting polymer

Carole Sentein*, Licinio Rocha, Aleksandra Apostoluk, Paul Raimond, Iris Duyssens, Ineke Van Severen, Thomas Cleij, Laurence Lutsen, Dirk Vanderzande, Vaidotas Kazukauskas, Mindaugas Pranaitis, Valius Cyras

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

Storage of an internal field in a polymeric semiconductor device should be of great interest for applications like photovoltaic solar cells to facilitate exciton dissociation and improve charge transport in the structure. Orientation of polar molecules, contained inside a polymer binder, induces a rectifying effect, behaving as a distributed homojunction within a single polymeric film. To investigate this concept, a new poly(p-phenylenevinylene) (ppv) derivative bearing push–pull like molecules was purposefully designed and synthesized. Effect of polar molecules’ orientation on carrier injection and transport properties was studied. In the test systems, we demonstrate an increase of the external quantum efficiency upon orientation.
Original languageEnglish
Pages (from-to)1816-1824
JournalSolar Energy Materials and Solar Cells
Volume91
Issue number19
DOIs
Publication statusPublished - 23 Nov 2007
Externally publishedYes

Keywords

  • organic solar cells
  • polymer semiconductors
  • molecular chain orientation
  • carrier transport

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