Due to the increasing miniaturization, lightweight, wearable, and portable electronic devices, there is an increasing need to reduce power consumption through the lower operating voltages of thin-film transistors (TFTs). In this study, we proposed a “water-in-bisalt” (WiBS) and an ultraviolet (UV)-curable polymer composite material, which is an aqueous electrolyte with a high capacitance, and realized a dielectric material for low power consumption and a stable voltage range of TFTs that can be handled in the ambient condition. We fabricated a free-standing WiBS/polymer dielectric film with a high capacitance value of 6.72 uF/cm2 at 0.5 Hz and high electrochemical stability by embedding a WiBS electrolyte into the UV crosslinked polymer network by photocuring. The devices of InOx TFTs using WiBS/polymer dielectric films show excellent electrical characteristics: an on/off current ratio of over 103, a subthreshold swing of 110 mV/dec at a drain voltage of 0.1 V, and a linear field-effect mobility of 30.7 cm2/Vs at a drain voltage of 0.1 V and a gate voltage of 1 V.
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29 April 2019
Research Article|
May 02 2019
Superconcentrated aqueous electrolyte and UV curable polymer composite as gate dielectric for high-performance oxide semiconductor thin-film transistors
Eun Goo Lee;
Eun Goo Lee
1
Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University 1 Gwanak-ro
, Gwanak-gu, Seoul 08826, South Korea
2
Samsung Display Company, Ltd
, 1 Samsung-ro, Giheung-gu, Yongin-si, Gyeonggi-Do 17113, South Korea
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Jintaek Park;
Jintaek Park
1
Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University 1 Gwanak-ro
, Gwanak-gu, Seoul 08826, South Korea
2
Samsung Display Company, Ltd
, 1 Samsung-ro, Giheung-gu, Yongin-si, Gyeonggi-Do 17113, South Korea
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Sung-Eun Lee;
Sung-Eun Lee
1
Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University 1 Gwanak-ro
, Gwanak-gu, Seoul 08826, South Korea
2
Samsung Display Company, Ltd
, 1 Samsung-ro, Giheung-gu, Yongin-si, Gyeonggi-Do 17113, South Korea
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Junhee Lee;
Junhee Lee
1
Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University 1 Gwanak-ro
, Gwanak-gu, Seoul 08826, South Korea
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Changik Im;
Changik Im
1
Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University 1 Gwanak-ro
, Gwanak-gu, Seoul 08826, South Korea
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Gayeong Yoo;
Gayeong Yoo
1
Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University 1 Gwanak-ro
, Gwanak-gu, Seoul 08826, South Korea
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Jeeyoung Yoo;
Jeeyoung Yoo
1
Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University 1 Gwanak-ro
, Gwanak-gu, Seoul 08826, South Korea
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Youn Sang Kim
Youn Sang Kim
a)
1
Program in Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University 1 Gwanak-ro
, Gwanak-gu, Seoul 08826, South Korea
3
Advanced Institute of Convergence Technology
, 145 Gwanggyo-ro, Yeongtong-gu, Suwon 16229, South Korea
a)Author to whom correspondence should be addressed: younskim@snu.ac.kr. Tel.: +82-31-888-9131. Fax: +82-31-888-9148
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a)Author to whom correspondence should be addressed: younskim@snu.ac.kr. Tel.: +82-31-888-9131. Fax: +82-31-888-9148
Appl. Phys. Lett. 114, 172903 (2019)
Article history
Received:
February 24 2019
Accepted:
April 12 2019
Citation
Eun Goo Lee, Jintaek Park, Sung-Eun Lee, Junhee Lee, Changik Im, Gayeong Yoo, Jeeyoung Yoo, Youn Sang Kim; Superconcentrated aqueous electrolyte and UV curable polymer composite as gate dielectric for high-performance oxide semiconductor thin-film transistors. Appl. Phys. Lett. 29 April 2019; 114 (17): 172903. https://doi.org/10.1063/1.5093741
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