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2019.04.26 16:50

[May 2. 2019] Theoretical studies of organic molecules in OLEDs: From chemical stability to the excited-state nature

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Speaker Prof. Dongwook-kim (Kyonggi University)
Date Thu. 2 May. 2019
Time 5:00pm
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.

 

References:

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.


List of Articles
No. Subject Speaker Date
Notice Spring semester 2019 Seminar Schedule file - -
63 [May 23. 2019] Molecular Engineering for Organic Electronics and Synchrotron X-rays Prof. Hyojung Kim (Pusan National University) Thu. 23 May. 2019
62 [May 16. 2019] Nano Structure Analysis by Synchrotron Small Angle X-ray Scattering Technique Dr. Hyungjoo-An (Pohang Accelerator Laboratory) Thu. 16 May. 2019
61 [May 9. 2019] Chemistry in Molecular Vessels file Prof. Partha Sarathi Mukherjee Thu. 9 May. 2019
» [May 2. 2019] Theoretical studies of organic molecules in OLEDs: From chemical stability to the excited-state nature Prof. Dongwook-kim (Kyonggi University) Thu. 2 May. 2019
59 [April 25. 2019] Colorful World of Quantum Dots Prof. Sungjee Kim (Pohang University of Science & Technology) Thu. 25 Apr. 2019
58 [April 4. 2019] Rational Design of Solid-State Materials with Asymmetric Coordination Environment Prof. Kang Min Ok (Sogang University) Thu. 4 Apr. 2019
57 [March 28. 2019] NMR Structural Studies of engineered novel antimicrobial peptides Prof. Yongae Kim (Hankuk University of Foreign Studies) Thu. 28 Mar. 2019
56 [March 21, 2019] Nanomaterials Design for Energy Conversion and Storage Prof. Jong-Hyuk Park (Yonsei University) Thu. 21 Mar. 2019
55 [March 27, 2019] Hyperpolarization Researches with NV center, 129Xe and Parahydrogen file Prof. Keunhong Jeong March 27, 2019
54 [March 20, 2019] Challenges in molecular dynamics simulations of unfolded proteins and protein-DNA complexes file Dr. Jejoong Yoo March 20, 2019
53 [March 5. 2019] Innovation@Agilent file Dr. Darlene Solomon (Agilent Technologies Inc.) Tuesday. 5 March. 2019
52 [March 5. 2019] Prof. Michael J. Sailor/Treatment of S. aureus Bacterial Infections with Porous Silicon Nanoparticles Prof. Michael J. Sailor (UC San Diego) Tuesday. 5 March. 2019
51 [Thu. 6 Dec. 2018] Prof. Dong-Ho Kim/Department of Chemistry, Yonsei University, Seoul, Korea Prof. Dong-Ho Kim (Yonsei University) Thu. 6 Dec. 2018
50 Fall semester 2018 Seminar Schedule file - -
49 [January 24, 2018] Electro-Optic Organic THz Wave Sources file Prof. O-Pil Kwon(Ajou University) January 24, 2018 (Wednesday)
48 [Thu. 30 Nov. 2017] Prof. Sunmin Ryu/Department of Chemistry, POSTECH, Pohang, South Korea Prof. Sunmin Ryu Thu. 30 Nov. 2017
47 [Thu. 23 Nov. 2017] Prof. Sung-Gon Kim/Department of Chemistry, Kyonggi University, Suwon, Korea Prof. Sung-Gon Kim Thu. 23 Nov. 2017
46 [November 14, 2017] Zero-Point Energy, Fluctuations, and Dissipation : A (Mostly) Quantum-Optical Perspective Prof. Milonni, Peter November 14, 2017
45 [Thu. 16 Nov. 2017] Prof. Hyungjun Kim/Department of Chemistry, and Graduate school of Energy, Environment, Water, and Sustainability (EEWS), KAIST, Daejeon, Korea Prof. Hyungjun Kim Thu. 16 Nov. 2017
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