Spray-printed organic field-effect transistors and complementary inverters

Dongyoon Khim, Kang Jun Baeg, Byung Kwan Yu, Seok Ju Kang, Minji Kang, Zhihua Chen, Antonio Facchetti, Dong Yu Kim*, Yong Young Noh

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

We report the fabrication of high-performance organic field-effect transistors (OFETs) and complementary inverters using spray-printed films of n-type small-molecule semiconductors and p-type conjugated polymers. Highly crystalline organic semiconductor films could be obtained by controlling the droplet size, nozzle-to-substrate distance, and solvent drying speed during the printing process. After the optimisation of the spray-printing process, the performances of the spray-printed OFETs were comparable to those of spin-coated and inkjet-printed OFETs. In addition to excellent device-to-device uniformity, the spray-printed n- and p-channel OFETs also exhibited high field-effect mobilities, which were ∼0.3 (ActivInk™ N1450, Polyera), ∼0.01 (regioregular-poly(3-hexylthiophene) (rr-P3HT)), and ∼0.25 cm2 V-1 s-1 (ActivInk™ P2100, Polyera). Organic complementary inverters were fabricated by spray printing and shadow-mask patterning while using ActivInk™ N1450 and P2100 as the n- and p-type semiconductors, respectively. The complementary inverters exhibited a large voltage gain (∼17) and a low power consumption (∼0.02 mW) at V DD = 60 V.

Original languageEnglish (US)
Pages (from-to)1500-1506
Number of pages7
JournalJournal of Materials Chemistry C
Volume1
Issue number7
DOIs
StatePublished - Feb 21 2013

ASJC Scopus subject areas

  • General Chemistry
  • Materials Chemistry

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