Effects of the graphene content on the conversion efficiency of P3HT:Graphene based organic solar cells

R. Bkakri, N. Chehata, A. Ltaief, O. E. Kusmartseva, F. V. Kusmartsev, M. Song, A. Bouazizi

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

Abstract We investigate the effects of the insertion of graphene in the matrix of regioregular poly (3-hexylthiophene-2,5-diyl) (RR-P3HT) on the conversion efficiency of ITO/P3HT:Graphene/Au solar cells. The X-ray diffraction (XRD) measurements show that progressive addition of graphene reduces the degree of order of P3HT lamellae along the hexyl-side direction (a-axis). The insertion of low graphene content in the P3HT matrix reduces the RMS roughness of the P3HT thin film, and improves the optical absorption properties of the device in the visible range. However for high doping level we observe the formation of graphene aggregates which in turn reduces the optical absorption properties of the device. The observed effects arising after addition of graphene to P3HT, and their relationship with the conversion efficiency of the devices are discussed in this work.

Original languageBritish English
Article number7552
Pages (from-to)206-211
Number of pages6
JournalJournal of Physics and Chemistry of Solids
Volume85
DOIs
StatePublished - 14 Jun 2015

Keywords

  • Electrical properties
  • Organic compounds
  • Polymers
  • Thin films

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