Transition metal dichalcogenides for optoelectronic devices
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작성자 최고관리자 댓글 0건 조회 80회 작성일 19-10-29 14:39본문
Speaker: 김수영 교수(고려대학교)
Date & Time: 2019년 10월 30일(수), 17:00
Where: 융합대학원 D-122호
Abstract
Recently, transition metal dichalcogenides (TMDs) including MoS2 and WS2 have attracted increasing attention because of their great potential as semiconductors of electronic devices such as field-effect transistors, organic photovoltaics, memory, logic, and energy storage devices. We will introduce three kinds of fabrication methods for TMDs.
First, TMD layers with a polycrystalline structure were synthesized by a chemical deposition method using uniformly spin-coated (NH4)MoS4 and (NH4)WS4 precursor solutions. TMDs were used in order to enhance the stability in air comparing to poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS). Furthermore, TMD layers were applied as the hole transport layer as well as the template for highly polarized OLEDs. Second, the backplane circuitry of a flexible display, comprising an array of transistors responsible for turning the individual OLED pixels ON and OFF, was fabricated using a metal-organic CVD (MOCVD)-grown bilayer MoS2 film on a 6-mm-thick ultrathin polyethylene terephthalate. Last, TMDs were synthesized using a direct synthesis method on a p-type Si wafer via thermolysis. The application of TMDs synthesized by last two methods also will be shown in this talk.
Biography
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Ph.D Materials Science and Engineering, POSTECH, Pohang, Korea <2007>
M.S. Materials Science and Engineering, POSTECH, Pohang, Korea <2003>
B.S. Materials Science and Engineering, POSTECH, Pohang, Korea <2001>
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Professor, Department of MSE, Korea University <2019. 9 – present>
Professor, Department of Chem. Eng., Chung-Ang University <2009. 3 – 2019. 8>
Visiting Scholar, Department of Chemistry, University of Chicago <2015. 7 – 2016. 8>
Post-doctoral fellow, Department of Chemistry, Georgia Institute of Tech. <2007. 9 – 2009. 2>
Post-doctoral fellow, Department of MSE, POSTECH <2007. 3 – 2007. 8>
초청자 : 융합과학부 나노융합전공 이강원 교수(031-888-9145, kangwonlee@snu.ac.kr)
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