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 10/2 (Tue) 김도환 교수 (한양대학교) ADMINI 2018.10.01 30
Notice Regular 9/18 (Tue) 강성준 교수 (Kyung Hee Univ.) ADMINI 2018.09.17 34
Notice Regular 9/11 (Tue) 이병두 박사 (Argonne National Laboratory) ADMINI 2018.09.07 62
Notice Regular 9/4 (Tue) 강기범 교수 (신소재공학과, KAIST) ADMINI 2018.09.03 68
Notice Regular 8/28 (Tue) 김경민 교수 (KAIST, 신소재공학과) ADMINI 2018.08.29 63
Notice Special 8/24 (Fri) Prof. Joel W. Ager III (UC Berkeley, Lawrence Berkeley National Laboratory) file ADMINI 2018.08.20 60
140 Regular 3/24(화) 김성웅교수 (성균관대학교 에너지과학과) TeamLeader 2015.03.18 1739
139 Regular 3/17(화) 안성태 교수 (KAIST 기업가정신진흥원) TeamLeader 2015.03.12 1820
138 Regular 3/10(화) 김준경 분원장 (KIST 전북분원 복합소재기술연구소) TeamLeader 2015.03.06 1504
137 3/4 (수) 한봉태 박사 (University of Maryland) file ADMINI 2015.03.04 1202
136 Regular 2015 가을학기 정기세미나 일정 file TeamLeader 2015.03.04 6836
135 Special 3/3 (수) 조은애 교수 (PEM Fuel Cells for Sustainable Transportation) file admin 2015.03.02 1613
134 Special 12/17 (수) Dr. Ron Jansen (AIST, Tsukuba, Japan) Administrator 2014.12.17 1756
133 Special 12/16 (화) 노 준 홍 박사 (광에너지융합소재연구센터, 한국화학연구원) Administrator 2014.12.17 1777
132 Special 11/28 (금) 오태식 박사 (University of Pennsylvania) Administrator 2014.11.26 2098
131 Special 11/14 (금) Dr. Amanda K. Petford-Long (Argonne National Laboratory) file Administrator 2014.11.04 2047
130 Regular 2014 가을학기 정기세미나 일정 Administrator 2014.08.28 4489
» Special 8/25 (월) 김 현 석 교수(충남대학교 재료공학과) Administrator 2014.08.26 2539
128 Special 8/21 (목) Prof. Frans Spaepen (Harvard University, School of Engineering and Applied Sciences) Administrator 2014.08.14 2137
127 Special 7/21 (월) Jamie Warner (University of Oxford) Administrator 2014.07.16 2596
126 Special 6/12 (목) 정호용 교수 (Florida State University 부임예정) Administrator 2014.06.09 2830
125 Regular 6/10 (화) 강성모 총장님 (KAIST) Administrator 2014.06.09 2109
124 Regular 6/3 (화) Prof. Alfredo Alexander-Katz (Dept. of MSE, MIT) Administrator 2014.06.03 3081
123 Regular 5/20 (화) 윤석진 박사 (한국과학기술연구원, 연구기획조정본부장) Administrator 2014.05.14 2746
122 Special 5/14 (수) 김윤섭 (Univ. of Michigan, Ph.D. candidate) Administrator 2014.05.14 2570
121 Special 4/30 (수) 김지환 박사 (IBM T.J. Watson Research Center) Administrator 2014.05.01 3070
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