Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1264512 | Organic Electronics | 2013 | 5 Pages |
•Top-contact organic TFTs with a channel length of 1 μm were fabricated on plastics.•The TFTs have a mobility of 1.2 cm2/V s and an on/off ratio of 107.•The transconductance has a standard deviation of no more than 6%.•Ring oscillators have a stage delay of 420 ns at a supply voltage of 3 V.
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 (C10-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.
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