Controlling polarity of organic bulk heterojunction field-effect transistors via solvent additives

Jin Kuen Park, Bright Walker, Jung Hwa Seo

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

The effect of additives such as 1,8-diiodooctane (DIO) and 1-chloronaphthalene (CN) on the electronic structures, charge transport and phase separation of small-molecule-based bulk heterojunction (BHJ) films was investigated. Charge transport properties of the BHJ layers significantly changed via the introduction of additives, even though the molecular energy levels remained unchanged. X-ray photoelectron microscopy (XPM) images show the distribution of each phase of the blend films upon the use of additives. The CN additive, in particular, results in a well-percolated network through the active layer.

Original languageEnglish
Pages (from-to)4575-4580
Number of pages6
JournalACS applied materials & interfaces
Volume5
Issue number11
DOIs
StatePublished - 12 Jun 2013

Keywords

  • X-ray photoelectron microscopy
  • additive
  • bulk heterojunction
  • organic field effect transistor
  • polarity
  • small molecule

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