Megahertz operation of flexible low-voltage organic thin-film transistors

Ute Zschieschang, Robert Hofmockel, Reinhold Rödel, Ulrike Kraft, Myeong Jin Kang, Kazuo Takimiya, Tarek Zaki, Florian Letzkus, Jörg Butschke, Harald Richter, Joachim N. Burghartz, Hagen Klauk

Research output: Contribution to journalArticlepeer-review

70 Citations (Scopus)


Bottom-gate, top-contact (inverted staggered) organic thin-film transistors with a channel length of 1 μm have been fabricated on flexible plastic substrates using the vacuum-deposited small-molecule semiconductor 2,9-didecyl-dinaphtho[2,3-b:2′,3′-f]thieno[3,2-b]thiophene (C 10-DNTT). The transistors have an effective field-effect mobility of 1.2 cm2/V s, an on/off ratio of 107, a width-normalized transconductance of 1.2 S/m (with a standard deviation of 6%), and a signal propagation delay (measured in 11-stage ring oscillators) of 420 ns per stage at a supply voltage of 3 V. To our knowledge, this is the first time that megahertz operation has been achieved in flexible organic transistors at supply voltages of less than 10 V.

Original languageEnglish
Pages (from-to)1516-1520
Number of pages5
JournalOrganic Electronics
Issue number6
Publication statusPublished - 2013 Jun


  • Flexible organic circuits
  • Organic thin-film transistors


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