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 1078999
566 <5/21> Magnetism and Superconductivity 2014.05.14 113282
565 <11/13> Computer-Aided Engineering for Nucleic Acid Nanostructures 2013.11.07 113099
564 <5/28> The hunt for high energy neutrinos with IceCube - more evidence for their astrophysical origin 2014.05.22 112758
563 <5/1> Entanglement and topological order in 1D and 2D systems 2013.04.18 112511
562 <10/15> How can population pyramids be used to explore the past? 2010.10.14 112368
561 <11/13(Tue.) 11:00am>Hund’s coupling driven role of $d_{3z^2-r^2}$ in stabilizing the hole-doped antiferromagnetic state in cuprates 2018.11.09 112219
560 <11/16> Study of carrier transport and charging effects in organic devices 2011.11.10 112183
559 <5/27(수) 오후4:30분>Controlling phases in epitaxial transition metal oxide thin films 2015.05.21 111759
558 <4/18> Action-angle variables for the near-horizon extreme black hole particle dynamics 2012.04.17 111517
557 <9/11> Complex networks in technology, biology and sociology 2009.09.04 110943
556 <2/1> The Surface Science of Adsorption on Crystalline Ferroelectric Polymer Surfaces 2010.01.25 110622
555 2018학년도 1학기 콜로퀴움 일정 2018.01.03 110576
554 <Oct.10(Wed.) 4:30 PM> Standard Model of Cosmology and Beyond 2018.09.21 110565
553 <Oct. 28(Wed.) 4:30 PM> Anomalous diffusion of single-molecules in living cells: at the interface of biology and statistical physics 2015.10.19 110357
552 <4/16> Lasers, Microscopes, and Superconductors: Laser Scanning Microscopy of Superconducting Circuits 2014.04.10 110301
551 <11/9> Bosons in high Tc superconductors: an experimental survey 2011.10.31 109535
550 <1/24> Basics of Gravitational Perturbatiosn 2011.01.19 109348
549 <6/8> 액체금속 및 물의 과냉각 현상과 국소구조와의 관계 : 정전기 공중부양 기술 및 dynamic diamond anvil cell 2011.06.07 109102
» <6/2>백색 LED를 이용한 반도체조명에 관하여 2006.05.29 108968
547 <4/27> RENO Reactor Neutrino Experiment 2011.04.18 108944