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Issue 7, 2013
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Spray-printed organic field-effect transistors and complementary inverters

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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 VDD = 60 V.

Graphical abstract: Spray-printed organic field-effect transistors and complementary inverters

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Publication details

The article was received on 31 Aug 2012, accepted on 14 Dec 2012 and first published on 18 Dec 2012


Article type: Paper
DOI: 10.1039/C2TC00085G
J. Mater. Chem. C, 2013,1, 1500-1506

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    Spray-printed organic field-effect transistors and complementary inverters

    D. Khim, K. Baeg, B. Yu, S. Kang, M. Kang, Z. Chen, A. Facchetti, D. Kim and Y. Noh, J. Mater. Chem. C, 2013, 1, 1500
    DOI: 10.1039/C2TC00085G

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