korean english


Home > 게시판 > 세미나

아래와 같이 콜로퀴움을 개최하오니 많이 참석해 주시기 바랍니다. 아 래 1. 제목: 백색 LED를 이용한 반도체조명에 관하여 2. 연사: 서 은 경 교수 (전북대학교) 3. 일시: 2006년 6월 2일(금요일) 오후 5시 00분 4. 장소: 물리학과 세미나실(31355호실) 5. 초록: GaN and its ternary alloys have attracted much attention for optoelectronic device applications whose emission wavelengths ranging from visible to uv light. Applicaitons of LEDs are widely expanded into the out-door display, LCD back light unit, traffic signal, and automotive illuminations. It is expected that LEDs will replace the present incandescent light bulb, for example, the combiantion of near UV or blue LEDs with optimized phosphors enabled the fabrication of highly efficient solid state light sources for illumination. However, many challenges remain for high power III-N based LEDs both in basic materials and device performance to meet the demands of increasing applications. For example, high efficiency green LEDs are one of the key elements in realizing high brightness RGB based white lighting systems. But, LEDs emitting at green wavelengths have suffered from a low internal quantum efficiency compared to blue and red, which is believed to be related to epitaxial materials quality and the fundamental structure of green LEDs. Also, InGaN based LEDs tend to exhibit reduced efficiency when the current density increses, possibly due to insufficient carrier confinement at high injection currents. Several challenges and current research topics will be discussed.
번호 제목 날짜 조회 수
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1033022
602 <11/5> Modified nucleic acid systems for biomedical applications 2010.11.01 110670
601 <Nov.13(Fri) 16:00> Kondo screening in mixed valence and heavy fermion compounds and the signatures of Nozieres’ exhaustion 2015.11.04 110657
600 <10/28>Grazing Incidence X-ray Diffraction and Surface X-ray Scattering Study of Hematite (α-Fe2O3) Nano-cube 2011.10.26 110606
599 <10/17> Graphitic Carbon Nanostructures 2008.10.27 110455
598 <3/19> Bioconjugates of nanomaterials for biochip & biosensor applications 2010.03.16 110053
597 <1/28> Steps towards a non-relativistic AdS/CFT 2010.01.25 109563
596 <3/31> ZnO nanorod heterostructures and nanodevices 2006.03.27 109529
595 <8/5>Brane superpotential via local Calabi-Yau spaces 2009.08.03 109445
594 2018학년도 1학기 콜로퀴움 일정 2018.01.03 108893
593 <4/21> Experimental and Observational Astrophysics in the Infrared Wavebands 2009.04.17 108797
592 <5/14> Search for exotic materials: strongly correlated electron system 2010.05.10 108432
591 <5/21> Magnetism and Superconductivity 2014.05.14 107056
590 2017학년도 2학기 콜로퀴움 일정 2017.07.04 105823
589 <3/26> Fractional Hall Physics of Epitaxial Graphene: 2010.03.19 105271
588 2014학년도 2학기 콜로퀴움 일정 2014.09.11 104857
587 <3/12(화)>물리학과 특별초청강연 개최 안내 2013.03.04 104737
586 <7/28> NQR/NMR study on a single crystal of LiFeAs 2010.07.20 104138
585 <10/15> How can population pyramids be used to explore the past? 2010.10.14 103766
584 <4/30(화)> DC (DNA Curtains) and AC (Actin Curtains) in single-molecule biophysics 2013.04.11 103513
583 <6/8> 액체금속 및 물의 과냉각 현상과 국소구조와의 관계 : 정전기 공중부양 기술 및 dynamic diamond anvil cell 2011.06.07 103473