Polymeric and Small-Molecule Semiconductors for Organic Field-Effect Transistors

Hakan Usta*, Antonio Facchetti

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapter

10 Scopus citations


This chapter reviews the achievements in the development of molecular and polymeric semiconductors for charge transport in thin-film transistors (TFTs). In particular, it introduces the basic concepts of organic semiconductor structure and organic thin-film transistor (OTFT) operation and then focuses on initial studies and works. Organic semiconductors for OTFTs must possess two essential structural features for their successful implementation in printed electronics. The first feature is a π-conjugated core/chain composed of linked unsaturated units. The second feature is core functionalization with solubilizing substituents, which is essential for inexpensive manufacture by solution methods as well as for enhancing solid-state core interactions. There are several advantages in using polymeric versus molecular p-conjugated semiconductors. Isoindigo has become a popular conjugated moiety in polymer semiconductor design because of its strong electron-withdrawing character. Polymeric p-channel TFTs have reached new heights, with hole mobilities unthinkable only few years back and surpassing 10 cm2V-1 s-1.

Original languageEnglish (US)
Title of host publicationLarge Area and Flexible Electronics
Number of pages100
ISBN (Electronic)9783527679973
ISBN (Print)9783527336395
StatePublished - Jan 16 2015


  • Isoindigo
  • Organic semiconductor
  • Organic thin-film transistor (OTFT)
  • P-conjugated semiconductors
  • Polymeric semiconductors

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)


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