Organic photovoltaic cells with nano-fabric heterojunction structure

Park J. H., Carter A. R., Mier L. M., Kao C., Lewis S. A. M., Nandyala R. P., ...More

APPLIED PHYSICS LETTERS, vol.100, no.7, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 100 Issue: 7
  • Publication Date: 2012
  • Doi Number: 10.1063/1.3679097
  • Journal Name: APPLIED PHYSICS LETTERS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Dokuz Eylül University Affiliated: No

Abstract

Organic photovoltaic cells containing electron-transporting organic nanofibers in the form of "nanofabrics" are investigated. Nano-fabric heterojunctions of poly(3-hexylthiophene) and electron-transporting nanofibers significantly improve short-circuit current density in organic photovoltaic cells. The nanofibers and nanofabric are synthesized from organic electron-transporting material bis(octyl)-perylenediimide (PDI-C-8). The PDI-C-8 based nano-fabric's electron mobility is measured to be 0.08 cm(2)/Vs. The nanofabric improves charge collection by expanding the interfacial acceptor-donor area while simultaneously providing dedicated electron transport pathways to the LiF/Al electrodes. An increase in fill factor is observed for photovoltaic cells incorporating the nanofabric heterojunctions and is attributed to efficient removal of space charge. (C) 2012 American Institute of Physics. [doi:10.1063/1.3679097]