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Woon-Seop Choi 5 Articles
589 Improving the Electrical Properties of Zinc-Tin Oxide Thin-Film Transistors by Additive using Electrohydrodynamic Jet Technology
전기수력학 젯 기술을 이용한 아연-주석 산화물 박막트랜지스터에서 첨가제에 의한 전기적 특성 향상
Woon-Seop Choi, Young Jik Lee, Yong Jae Kim
최운섭, 이영직, 김용재
Korean J. Met. Mater. 2023;61(8):589-593.   Published online 2023 Jul 24
DOI: https://doi.org/10.3365/KJMM.2023.61.8.589

Abstract
Oxide thin-film transistors (TFTs) are important semiconductor materials for display backplanes. To fabricate flexible displays, not only display modes but also TFTs are important. Flexible TFTs are especially needed for flexible displays, and related processes need to be developed. Printing is a good choice for the new fabrication of oxide..... More

                
602 Transition Metal Dichalcogenide WS2 Films Prepared with a Combination of Spin/Dip Coating and CVD
Woon-Seop Choi
Korean J. Met. Mater. 2023;61(8):602-607.   Published online 2023 Jul 24
DOI: https://doi.org/10.3365/KJMM.2023.61.8.602

Abstract
Recently, transition metal dichalcogenides (TMDCs) with 2D structure have attracted interest due to their many unique optical and electrical properties. The primary preparation methods for 2D materials are chemical vapor deposition (CVD), exfoliation, and other vacuum technologies. Large-scale synthesis of WS2 via solution-process is rare due to the higher temperature..... More

                
314 Preparation of Li-Doped Indium-Zinc Oxide Thin-Film Transistor at Relatively Low Temperature Using Inkjet Printing Technology
잉크젯 인쇄 기술을 이용하여 상대적으로 낮은 온도에서 리튬이 도핑 된 인듐-아연-산화물 트랜지스터의 제작
Woon-Seop Choi
최운섭
Korean J. Met. Mater. 2021;59(5):314-320.   Published online 2021 Apr 6
DOI: https://doi.org/10.3365/KJMM.2021.59.5.314

Abstract
Inkjet printing is a very attractive technology for printed electronics and a potential alternative to current high cost and multi-chemical lithography processes, for display and other applications in the electronics field. Inkjet technology can be employed to fabricate organic light emitting diodes (OLED), quantum dots displays, and thin-film transistors (TFTs)...... More

                   Web of Science 4  Crossref 4
258 Doping Effect of Indium on Zinc-tin Oxide Thin-Film Transistor Using Electrohydrodynamic Jet Spray Technology
전기수력학젯 분산 기술을 이용한 아연-주석 산화물 박막트랜지스터의 인듐 도핑 효과
Woon-Seop Choi
최운섭
Korean J. Met. Mater. 2019;57(4):258-263.   Published online 2019 Apr 5
DOI: https://doi.org/10.3365/KJMM.2019.57.4.258

Abstract
The effect of indium doping on zinc-tin oxide thin-film transistor was investigated using electrohydrodynamic (EHD) jet spray technology. EHD jet spray is a new and unique drop-on-demand patterning technology for printed electronics. After optimizing process parameters, the EHD jet spraying conditions were determined to be a voltage of 4.5 kV,..... More

                   Web of Science 2  Crossref 2
170 Effect of Zn Doping on an Inkjet-Printed Metal Oxide Thin-Film Transistor at Low Temperature of 200 oC
저온 200 oC에서 잉크젯인쇄에 의한 금속산화물 박막트랜지스터의 아연도핑 효과
Woon-Seop Choi
최운섭
Korean J. Met. Mater. 2019;57(3):170-175.   Published online 2019 Feb 8
DOI: https://doi.org/10.3365/KJMM.2019.57.3.170

Abstract
Amorphous oxide semiconductors have attracted much attention due to their good electrical properties with wide band gaps and low cost process, which are used as backplanes for displays. However, there are some issues regarding low temperature process with high mobility and printing capability. The inkjet method is an attractive technology..... More

                   Web of Science 4  Crossref 2
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