Design criteria for transparent single-wall carbon nanotube thin-film transistors

Husnu Emrah Unalan, Giovanni Fanchini, Alokik Kanwal, Aurelien Du Pasquier, Manish Chhowalla

Research output: Contribution to journalArticlepeer-review

157 Scopus citations


A study based on two-dimensional percolation theory yielding quantitative parameters for optimum connectivity of transparent single-wall carbon nanotube (SWNT) thin films is reported. Optimum SWNT concentration in the filtrated solution was found to be 0.1 mg/L with a volume of 30 ml. Such parameters lead to SWNT fractions in the films of approximately Φ = 1.8 × 10 -3, much below the metallic percolation threshold, which is found to be ∼Φ c = 5.5 × 10 -3. Therefore, the performance of transparent carbon nanotube thin-film transistors is limited by the metallic SWNTs, even below their percolation threshold. We show how this effect is related to hopping or tunneling between neighboring metallic tubes.

Original languageEnglish (US)
Pages (from-to)677-682
Number of pages6
JournalNano Letters
Issue number4
StatePublished - Apr 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering


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