Fluoropolymer coatings for improved carbon nanotube transistor device and circuit performance

Seonpil Jang*, Bongjun Kim, Michael L. Geier, Pradyumna L. Prabhumirashi, Mark C. Hersam, Ananth Dodabalapur

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


We report on the marked improvements in key device characteristics of single walled carbon nanotube (SWCNT) field-effect transistors (FETs) by coating the active semiconductor with a fluoropolymer layer such as poly(vinylidene fluoride-trifluoroethylene) (PVDF-TrFE). The observed improvements include: (i) A reduction in off-current by about an order of magnitude, (ii) a significant reduction in the variation of threshold voltage, and (iii) a reduction in bias stress-related instability and hysteresis present in device characteristics. These favorable changes in device characteristics also enhance circuit performance and the oscillation amplitude, oscillation frequency, and increase the yield of printed complementary 5-stage ring oscillators. The origins of these improvements are explored by exposing SWCNT FETs to a number of vapor phase polar molecules which produce similar effects on the FET characteristics as the PVDF-TrFE. Coating of the active SWCNT semiconductor layer with a fluoropolymer will be advantageous for the adoption of SWCNT FETs in a variety of printed electronics applications.

Original languageEnglish (US)
Article number122107
JournalApplied Physics Letters
Issue number12
StatePublished - Sep 22 2014

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


Dive into the research topics of 'Fluoropolymer coatings for improved carbon nanotube transistor device and circuit performance'. Together they form a unique fingerprint.

Cite this