Degree of phase separation effects on the charge transfer properties of P3HT:Graphene nanocomposites

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

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

Graphene layers were introduced into the matrix of regioregular poly (3-hexylthiophene-2, 5-diyl) (RR-P3HT) via solution processing in the perspective of the development of organic nanocomposites with high P3HT/Graphene interfaces areas for efficient charge transfer process. P3HT and graphene act as electrons donor and electrons acceptor materials, respectively. Spatial Fourier Transforms (FFT) and power spectral density (PSD) analysis of the AFM images show that the phase separation decreases with increasing the graphene weight ratio in the P3HT matrix. The Raman spectra of the P3HT:Graphene nanocomposites shows that the G-band of graphene shifts to low frequencies with progressive addition of graphene which proves that there is an interaction between the nanowires of P3HT and the graphene layers. We suggest that the shift of the G-band is due to electrons transfer from P3HT to graphene. The quenching of the photoluminescence (PL) intensity of P3HT with addition of graphene proves also that an electrons transfer process occurred at the P3HT/Graphene interfaces.

Original languageBritish English
Pages (from-to)264-270
Number of pages7
JournalJournal of Luminescence
Volume161
DOIs
StatePublished - May 2015

Keywords

  • Charge transfer
  • Organic nanocomposite
  • Phase separation
  • Polymer

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