신소재공학과

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2014년 8월 21일 (목) 개최되는 특별 세미나를 아래와 같이 안내해드립니다.


= 아 래 =


1. 일 시 : 2014. 8. 25 (월), 10:30 ~
2. 장 소 : 신소재 공학과 2429호
3. 연 사 : 김 현 석 교수(충남대학교 재료공학과)
4. 제 목 : 차세대 디스플레이 응용을 위한 고이동도, 고신뢰성 산화물 박막 트랜지스터 기술
5. 발표내용요약(Abstract)

  Increasing demands for high performance transistors for flat panel displays have led to the development of high mobility metal oxide based semiconductors such as In-Ga-Zn-O (IGZO). Thin-film transistors (TFTs) that use such materials have field effect mobility exceeding 10 cm2/Vs, and are suitable for AMLCDs with ultra definition (4000 x 2000), large size (> 70 inch). However, display technology is now oriented towards AMOLED displays, which need driving transistors with higher field effect mobility. In this work, an alternative type of high mobility semiconductor, zinc oxynitride (Zn-O-N), is studied by both theoretical calculations and experimental evaluation of thin films and TFT devices. Hall measurements of reactively sputtered Zn-O-N films indicate that the material is n-type. First principles density functional theory (DFT) calculations are performed to examine the carrier effective mass in pure zinc nitride (Zn3N2), and nitrogen vacancies (VN) are found to be the most dominant shallow donor-like defects. It is shown that doping with metal cations that form a stronger bond with nitrogen leads to the suppression of free carriers, which is confirmed experimentally by doping high mobility Zn-O-N films with gallium (Ga) and aluminum (Al). Thin film transistor devices fabricated using both undoped and Ga-doped Zn-O-N further show such defect reduction, resulting in decreased off-currents and subthreshold swing.


List of Articles
No. Category Subject Author Date Views
Notice Regular 12/4 (Tue) 정두석 교수 (한양대학교 신소재공학부) ADMINI 2018.11.30 32
Notice Regular 11/27 (Tue) 정성준 교수 (숭실대학교 유기신소재 파이버공학과) ADMINI 2018.11.26 35
Notice Regular 11/20 (Tue) 김연수 교수 (포항공대 신소재공학과) ADMINI 2018.11.19 44
Notice Special 11/14 (Wed) Prof. Hui-Ming Cheng (Director and Professor, Tsinghua University, IMR CAS) ADMINI 2018.11.13 27
Notice Special 11/20 (Tue) Prof. Alfonso H. W. Ngan (Department of Mechanical Engineering, University of Hong Kong) file ADMINI 2018.11.13 27
Notice Regular 11/13 (Tue) 이강욱 박사 (SK 하이닉스) ADMINI 2018.11.13 29
Notice Regular 11/6 (Tue) 장동찬 교수 (KAIST 원자력 및 양자공학과) ADMINI 2018.11.02 52
150 Regular 6/2(화) Prof. Christopher Bielawski (UNIST 화학과) TeamLeader 2015.05.28 1630
149 Regular 5/26(화) 박성호 원장 (POSCO 기술연구원) TeamLeader 2015.05.28 1727
148 Regular 5/19(화) 안희준 교수 (한양대학교 유기나노공학과) TeamLeader 2015.05.18 1930
147 Special 5/15(금) Prof. James J. Moon (Univ. of Michigan) file TeamLeader 2015.05.13 1667
146 Regular 5/12(화) 임태원 상무 (현대자동차 중앙연구소) TeamLeader 2015.05.08 1957
145 Regular 4/28(화) 이상윤 전무 (삼성종합기술원) TeamLeader 2015.04.24 1795
144 Special 4/20(월) Prof. Milo Shaffer (Dept. of Chemistry, Imperial College London, The London Centre for Nanotechnology) file TeamLeader 2015.04.15 1669
143 Regular 4/14(화) 문회리 교수 (UNIST, 화학과) TeamLeader 2015.04.08 1784
142 Regular 4/7(화) 이현주 교수 (KAIST 생명화학공학과) TeamLeader 2015.04.01 1894
141 Special 3/25(Wed) Chatr Panithipongwut (Chulalongkorn University) TeamLeader 2015.03.23 1655
140 Regular 3/24(화) 김성웅교수 (성균관대학교 에너지과학과) TeamLeader 2015.03.18 1741
139 Regular 3/17(화) 안성태 교수 (KAIST 기업가정신진흥원) TeamLeader 2015.03.12 1845
138 Regular 3/10(화) 김준경 분원장 (KIST 전북분원 복합소재기술연구소) TeamLeader 2015.03.06 1508
137 3/4 (수) 한봉태 박사 (University of Maryland) file ADMINI 2015.03.04 1204
136 Regular 2015 가을학기 정기세미나 일정 file TeamLeader 2015.03.04 6838
135 Special 3/3 (수) 조은애 교수 (PEM Fuel Cells for Sustainable Transportation) file admin 2015.03.02 1616
134 Special 12/17 (수) Dr. Ron Jansen (AIST, Tsukuba, Japan) Administrator 2014.12.17 1758
133 Special 12/16 (화) 노 준 홍 박사 (광에너지융합소재연구센터, 한국화학연구원) Administrator 2014.12.17 1786
132 Special 11/28 (금) 오태식 박사 (University of Pennsylvania) Administrator 2014.11.26 2100
131 Special 11/14 (금) Dr. Amanda K. Petford-Long (Argonne National Laboratory) file Administrator 2014.11.04 2049
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