Measurement of the diffusivity of fullerenes in polymers using bilayer organic field effect transistors

John G. Labram, James Kirkpatrick, Donal D.C. Bradley, Thomas D. Anthopoulos

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Bilayer poly(3-hexylthiophene):[6,6]-phenyl C61-butyric acid methyl ester (PC61BM) [P3HT:PC61BM] organic field-effect transistors (OFETs) have been fabricated using a bottom-contact, bottom-gate (BCBG) architecture. By annealing these devices and monitoring the magnitude of the electron field-effect mobility, information about the diffusion properties of PC61BM in P3HT can be obtained. Using a solution to the one-dimensional diffusion equation and an application of percolation theory, a relationship between electron field-effect mobility, diffusion coefficient, and annealing time has been obtained. By applying this model to time-dependent mobility measurements, a rough approximation of 5 nm2s-1 has been made for the diffusion coefficient of PC61BM in P3HT at a temperature of 130°C. © 2011 American Physical Society.
Original languageEnglish (US)
Article number075344
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume84
Issue number7
DOIs
StatePublished - Aug 18 2011
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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