logo

korean english

게시판

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 1058330
681 2019학년도 2학기 콜로퀴움 일정 2019.07.17 424716
680 <12/3> Magnetic couplings, optical spectra, and spin-orbit exciton in 5d Mott insulator Sr2IrO4 2012.11.26 360354
679 <Mar.3(Wed.)>Scaling laws in Natural Language Processing 2021.02.25 319208
678 2017학년도 1학기 콜로퀴움 일정 2017.01.05 283548
677 <10/25> Wave properties of dipole-exchange spin waves in confined magnetic thin films 2006.10.25 265735
676 2020학년도 1학기 콜로퀴움 일정 2020.01.31 253254
675 <5/16> 물리학자가 바라 본 단백질: 왜, 어떻게 연구하는가? 2012.05.10 252518
674 BK 석학초청 특별세미나 - Frustration and dimensional reduction in multi-orbital systems 2011.10.28 243199
673 <11/6> Graphene plasmon and Plasmonics 2013.10.31 235614
672 <3/14>Adaptive Optics for the Human Eye and Ophthalmic Applications 2008.03.12 235533
671 <6/11> Advanced Physiological Optics and Its Ophthalmic Applications 2014.05.28 234948
670 <8/30(Wed.)10:30>​Technology convergence and applications of Large-Area Electronics, e-Textiles, bio-sensors and bio-electronics 2017.08.29 229023
669 <6/17> Oscillating Fuzzy Sphere and M5/anti M5 configurations in ABJM model 2009.06.16 228286
668 <12/21> Special Seminar by Professor Ilya Vekhter 2010.11.30 226968
667 <Jan.14(Thu.)>Oxygen sponge effects for epitaxial manganite thin film design 2021.01.11 217540
666 <11/5(화)> 특별세미나 개최 안내 2013.11.01 211072
665 <5/16(토)> 세미나 개최 안내 2015.05.18 206682
664 <June.12(Wed.)> Ribocomputing: Cellular Logic Computation using RNA Devices file 2019.06.07 204803
663 <Sep. 23(Wed.) 4:30 PM>Grain boundary effect in Metal : A journey of discovery from crystal to thin films without grain boundaries 2015.09.16 198084