Drastic control of texture in a high performance n-type polymeric semiconductor and implications for charge transport

Jonathan Rivnay, Robert Steyrleuthner, Leslie H. Jimison, Alberto Casadei, Zhihua Chen, Michael F. Toney, Antonio Facchetti, Dieter Neher, Alberto Salleo*

*Corresponding author for this work

Research output: Contribution to journalArticle

214 Scopus citations

Abstract

Control of crystallographic texture from mostly face-on to edge-on is observed for the film morphology of the n-type semicrystalline polymer {[N,N-9-bis(2-octyldodecyl)naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl] -alt-5,59-(2,29-bithiophene)}, P(NDI2OD-T2), when annealing the film to the polymer melting point followed by slow cooling to ambient temperature. A variety of X-ray diffraction analyses, including pole figure construction and Fourier transform peak shape deconvolution, are employed to quantify the texture change, relative degree of crystallinity and lattice order. We find that annealing the polymer film to the melt leads to a shift from 77.5% face-on to 94.6% edge-on lamellar texture as well as to a 2-fold increase in crystallinity and a 40% decrease in intracrystallite cumulative disorder. The texture change results in a significant drop in the electron-only diode current density through the film thickness upon melt annealing, while little change is observed in the in-plane transport of bottom gated thin film transistors. This suggests that the texture change is prevalent in the film interior and that either the (bottom) surface structure is different from the interior structure or the intracrystalline order and texture play a secondary role in transistor transport for this material.

Original languageEnglish (US)
Pages (from-to)5246-5255
Number of pages10
JournalMacromolecules
Volume44
Issue number13
DOIs
StatePublished - Jul 12 2011

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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    Rivnay, J., Steyrleuthner, R., Jimison, L. H., Casadei, A., Chen, Z., Toney, M. F., Facchetti, A., Neher, D., & Salleo, A. (2011). Drastic control of texture in a high performance n-type polymeric semiconductor and implications for charge transport. Macromolecules, 44(13), 5246-5255. https://doi.org/10.1021/ma200864s