In-situ monitoring of the solid-state microstructure evolution of polymer:fullerene blend films using field-effect transistors: fullerene blend films using field-effect transistors

John G. Labram, Ester Buchaca Domingo, Natalie Stingelin, Donal D.C. Bradley, Thomas D. Anthopoulos

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

Organic field-effect transistors (OFETs) are used to investigate the evolution of the solid-state microstructure of blends of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C61-butyric acid methyl ester (PC 61BM) upon annealing. Changes in the measured field-effect mobility of holes and electrons are shown to reveal relevant information about the phase-segregation in this system, which are in agreement with a eutectic phase behavior. Using dual-gate OFETs and in-situ measurements, it is demonstrated that the spatial- and time-dependence of microstructural changes in such polymer:fullerene blend films can also be probed. A percolation-theory-based simulation is carried out to illustrate how phase-segregation in this system is expected to lead to a substantial decrease in the electron conductivity in an OFET channel, in qualitative agreement with experimental results. The evolution of the solid-state microstructure of binary P3HT:PC61BM blend films upon annealing is monitored using field-effect measurements. Changes in the measured hole and electron mobilities are shown to reveal relevant information about the phase-segregation in this system. Using single/dual-gate transistors and in-situ measurements, it is demonstrated that the spatial- and time-dependence of microstructural changes in such polymer:fullerene blend films can be probed. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Original languageEnglish (US)
Pages (from-to)356-363
Number of pages8
JournalAdvanced Functional Materials
Volume21
Issue number2
DOIs
StatePublished - Jan 21 2011
Externally publishedYes

Keywords

  • Organic Electronics
  • Organic Field-Effect Transistors
  • Organic Photovoltaic
  • Organic Semiconducting Blends
  • Organic Semiconductors
  • Thin Films

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Condensed Matter Physics
  • Electrochemistry

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