Charge Carrier Transport in Thin Conjugated Polymer Films: Influence of Morphology and Polymer/Substrate Interactions

Ban Xuan Dong, J. Wenderott, Peter Green

Research output: Contribution to journalArticlepeer-review

4 Scopus Citations

Abstract

The performance of conjugated polymer (CP)-based electronic devices relies on optimal charge carrier mobilities, which are determined by monomeric architecture, degree of polymerization, chain conformation, and the nano- and mesoscale morphologies. With regard to the latter, we discuss two effects that have received limited attention in the literature, yet important for device performance optimization: (1) the role of morphological disorder and of CP/substrate interactions on the in-plane and out-of-plane carrier transport in CPs; (2) the impact of morphological disorder on charge transfer at the CP/substrate interface. The emergence of film thickness-dependent carrier mobilities, varying over two orders of magnitude within a length scale of 200 nm, and band-bending phenomena, extending tens of nanometers within the CP, are associated with these effects. These findings suggest areas for further research in order to enable widespread applications of next-generation CP-based devices. Graphical abstract[Figure not available: see fulltext.]

Original languageAmerican English
Pages (from-to)439-456
Number of pages18
JournalColloid and Polymer Science
Volume299
Issue number3
DOIs
StatePublished - 2021

Bibliographical note

Publisher Copyright:
© 2020, Springer-Verlag GmbH Germany, part of Springer Nature.

NREL Publication Number

  • NREL/JA-5A00-76793

Keywords

  • Band bending
  • Charge transport
  • Conjugated polymers
  • Polymer/substrate interactions
  • Thickness dependence

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