Ultrathin body poly(3-hexylthiophene) transistors with improved short-channel performance

Chenchen Wang, Jonathan Rivnay, Scott Himmelberger, Kiarash Vakhshouri, Michael F. Toney, Enrique Daniel Gomez, Alberto Salleo

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

The microstructure and charge transport properties of binary blends of regioregular (rr) and regiorandom (RRa) poly(3-hexylthiophene) (P3HT) are investigated. X-ray diffraction of the blended films is consistent with a vertically separated structure, with rr-P3HT preferentially crystallizing at the semiconductor/dielectric interface. Thin film transistors made with these blended films preserve high field effect mobility with rr-P3HTcontent as low as 5.6%. In these dilute blends, we estimate that the thickness of rr-P3HT in the channel is only a few nanometers. Significantly, as a result of such an ultrathin active layer at the interface, short channel effects due to bulk currents are eliminated, suggesting a new route to fabricate high-performance, short-channel, and reliable organic electronic devices.

Original languageEnglish (US)
Pages (from-to)2342-2346
Number of pages5
JournalACS Applied Materials and Interfaces
Volume5
Issue number7
DOIs
StatePublished - Apr 10 2013

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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