High-resolution electrohydrodynamic inkjet printing of stretchable metal oxide semiconductor transistors with high performance.

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Nanoscale, ISSN: 2040-3372, Vol: 8, Issue: 39, Page: 17113-17121

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Kim, S,-Y.; Kim, K.; Hwang, Y.H.; Park, J.; Jang, J.; Nam, Y.; Kang, Y.; Kim, M.; Park, H.J.; Lee, Zonghoon; Choi, Jaehyouk; Kim, Y.; Jeong, S.; Bae, B.-S.; Park, Jang-Ung Show More Hide
Royal Society of Chemistry (RSC); ROYAL SOC CHEMISTRY; The Royal Society of Chemistry
Materials Science
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article description
As demands for high pixel densities and wearable forms of displays increase, high-resolution printing technologies to achieve high performance transistors beyond current amorphous silicon levels and to allow low-temperature solution processability for plastic substrates have been explored as key processes in emerging flexible electronics. This study describes electrohydrodynamic inkjet (e-jet) technology for direct printing of oxide semiconductor thin film transistors (TFTs) with high resolution (minimum line width: 2 μm) and superb performance, including high mobility (∼230 cm V s). Logic operations of the amplifier circuits composed of these e-jet-printed metal oxide semiconductor (MOS) TFTs demonstrate their high performance. Printed InO TFTs with e-jet printing-assisted high-resolution S/D electrodes were prepared, and the direct printing of passivation layers on these channels enhanced their gate-bias stabilities significantly. Moreover, low process temperatures (<250 °C) enable the use of thin plastic substrates; highly flexible and stretchable TFT arrays have been demonstrated, suggesting promise for next-generation printed electronics.