logo

korean english

게시판

Home > 게시판 > 세미나

아래와 같이 콜로퀴움을 개최하오니 많이 참석해 주시기 바랍니다.

4시 20분부터 제1과학관 31214 e+강의실에서 다과를 준비하오니 많은 참석 부탁드립니다

 

아 래

 

제목: 삼중항 여기자를 이용한 유기광전소자 연구

        Organic (polymer) electronics using triplet excitons

 

연사: 이  창  렬  교수님 (광주과학기술원) 

 

일시: 2012년 4월 18(수) 오후4:30

 

장소: 31214  e+첨단강의실

 

초록:  In polymer light emitting diodes (PLEDs), recombination of injected charge leads to the formation of both singlet and triplet excitons, of which normally only the singlets can decay radiatively. If the recombination process is statistical, only 25% of excitons will be formed as singlets; however, several reports have suggested that this limit may be broken in PLEDs. The issue remains controversial, largely because it is difficult to quantify the population of non-emissive triplet states in a device. Excited state absorption measurement can be used to quantify the population of triplet states in polymer films and device, but this measurement depends on the value of the triplet-triplet absorption cross-section, which in not well known. In the first section of this talk, the measurement of the triplet-triplet absorption cross-section of a conjugated polymer, F8BT, by using quasi-steady-state photo-induced absorption technique in phosphorescent dye blended polymer film 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 1056079
662 <Dec. 1(Wed.)>Halide Perovskite Single Crystals and Thin Films for Solar Cells and Optoelectronics 2021.11.25 189529
661 <9/20> Time-reversal anomaly in Josephson effect involving Majorana fermions 2012.09.20 189010
660 <11/26(수)> Neutrino Physics with KamLAND 2014.11.20 187161
659 <11/21> Cosmological viable scalar-tensor theories of gravity 2012.11.16 177779
658 <Nov. 18(Wed.) 4:30 PM> Single-molecule chemistry and spectroscopy on ultrathin insulating films 2015.11.11 177477
657 <12/20(Thu) 2:00pm> Gravitating Spinning Stars (a particle theorist's perspective) 2018.12.17 176018
656 <Oct. 7(Wed.) 4:30 PM> Observing Ultra High Energy Cosmic Rays with your Smartphone 2015.10.02 175947
655 <May. 25(Wed.) 4:30 PM> Functional Materials @ Nanoscale: Electronics, Energy and ‘Green’Healthcare Applications 2016.05.23 174355
654 <12/4> Shining light on the dark Universe 2013.11.29 174015
653 <10/31> Large-Scale Quantitative Analysis of Painting Arts 2012.10.18 170913
652 <Nov. 16(Wed.) 4:30 PM> Two-dimensional Chiral Materials and Topological Insulators 2016.11.10 168613
651 <4/2> Radio Detection of Ultra High Energy Cosmic Rays and Neutrinos in Antarctica 2014.03.26 165870
650 <3/13> Probing hidden magnetism and quantum criticality in unconventional superconductors 2009.03.06 162588
» <4/18> 삼중항 여기자를 이용한 유기광전소자 연구 2012.04.05 159875
648 <Feb.18(Thu.)> Hund's metallicity in the vicinity of a Van Hove singularity / Correlated topological phases in strongly correlated heterostructures 2021.02.16 159096
647 <6/2> The black hole search at the LHC: critical comment 2011.06.01 158340
646 <11/7> On-Film Formation of Bi Nanowires with Extraordinary Electron Mobility 2008.11.03 157716
645 <8/20> Radioprotection effect and anti-tumor immunity by TCM-EF in mice 2013.08.21 155485
644 2020학년도 2학기 콜로퀴움 일정 2020.07.16 154941
643 <Dec.5(Wed.)> 두 펄사 이야기 2018.11.28 154932