|Speaker||Prof. Dongwook-kim (Kyonggi University)|
|Date||Thu. 2 May. 2019|
|Venue||#331, Asan Hall, College of Science|
Theoretical studies of organic molecules in OLEDs:
From chemical stability to the excited-state nature
Since their first invention, the performance of organic light emitting diodes (OLEDs) have tremendously been improved for last three decades. In such a long journey, theoretical and computational studies have provided fundamental insights into various optical/physical /chemical phenomena in the devices and suggested the design rules of new efficient organic semiconducting materials to improve the device performance. Among many such studies, for example, in the case of thermally activated delayed fluorescence (TADF) phenomenon, which enables a full harvest of triplet excitons with organic emitters, our recent theoretical studies have unveiled the true nature of the singlet and triplet energy difference,1-2 and the role of different excited-nature between such states in the intersystem crossing.3 In addition, the role of multiple donor or acceptor units in enhancing the intersystem crossing rate and fluorescence rate was recently addressed.4 We recently also investigated the chemical stabilities of organic semiconducting materials in a combination of electron donor and acceptor units, pertaining to the device lifetime.5-6 In this talk, I would like to briefly discuss the chemical stabilities and excited-state natures of organic semiconducting materials in OLEDs.
1. D. Kim, J. Phys. Chem. C 2015, 119, 12690.
2. K. Lee and D. Kim, J. Phys. Chem. C 2016, 120, 28330.
3. P.K. Samanta, D. Kim, V. Coropceanu and J.-L. Bredas, J. Am. Chem. Soc. 2017, 139, 4042.
4. C. Ahn and D. Kim, submitted.
5. H. Li et. al. Chem. Mater. 2019, 31, 1507
6. D. Kim, submitted.
|Notice||Spring semester 2019 Seminar Schedule||-||-|
|68||Fall semester 2016 Seminar Schedule||-||-|
|67||Spring semester 2017 Seminar Schedule||-||-|
|66||[Thu. 27 Apr. 2017] Seminar was canceled!||-||-|
|65||[Wed. 5 July. 2017] Seminar is canceled!||-||-|
|64||Fall semester 2017 Seminar Schedule||-||-|
|63||Fall semester 2018 Seminar Schedule||-||-|
|62||7th Jilin-Korea-Waseda Alliance Annual Symposium||-||August 17 ~ 19, 2017|
|61||[Fri. 13 Oct. 2017] Dr. J. Nathan Hohman/The Molecular Foundry, Lawrence Berkeley National Laboratory, California, USA||Dr. J. Nathan Hohman||Fri. 13 Oct. 2017|
|60||[Fri. 16 Jun. 2017] Prof. Martin Thuo/Department of Materials Science and Engineering, Iowa State University, USA||Prof. Martin Thuo||Fri. 16 Jun. 2017|
|59||[Fri. 17 Mar. 2017] 9th RINS Symposium||-||Fri. 17 Mar. 2017|
|58||[Fri. 30 Oct. 2017] Prof. Igor Rodin/Department of Chemistry, Moscow State University, Moscow, Russia||Prof. Igor Rodin||Fri. 30 Oct. 201|
|57||[Fri. 17 Jun. 2016] Prof. Jianwei Sun/Remote Control in Brønsted Acid Catalysis: New Strategies for the Synthesis of Chiral Building Blocks and Medium Rings||Prof. Jianwei Sun||Friday 17 June 2016|
|56||[January 24, 2018] Electro-Optic Organic THz Wave Sources||Prof. O-Pil Kwon(Ajou University)||January 24, 2018 (Wednesday)|
|55||[March 20, 2019] Challenges in molecular dynamics simulations of unfolded proteins and protein-DNA complexes||Dr. Jejoong Yoo||March 20, 2019|
|54||[March 27, 2019] Hyperpolarization Researches with NV center, 129Xe and Parahydrogen||Prof. Keunhong Jeong||March 27, 2019|
|53||[Mon. 16 Oct. 2017] Prof. Kirk S. Schanze/Department of Chemistry, University of Texas at San Antonio, Texas, USA||Prof. Kirk S. Schanze||Mon. 16 Oct. 2017|
|52||[Mon. 9 Jan. 2017] Prof. Sungwook Woo/Wyss Institute for Biologically Inspired Engineering, Harvard University, USA||Prof. Sungwook Woo||Mon. 9 Jan. 2017|
|51||[Mon. 13 Oct. 2016] Prof. Amir H. Hoveyda/Multicomponent Catalytic Synthesis of Organoboron Compounds for Scalable Natural Product Synthesis||Prof. Amir H. Hoveyda||Monday 13 October 2016|
|50||[November 14, 2017] Zero-Point Energy, Fluctuations, and Dissipation : A (Mostly) Quantum-Optical Perspective||Prof. Milonni, Peter||November 14, 2017|
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