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23 results on '"Chae, Hyun Sik"'

4. Large Increase in External Quantum Efficiency by Dihedral Angle Tuning in a Sky‐Blue Thermally Activated Delayed Fluorescence Emitter

Author

Massachusetts Institute of Technology. Department of Chemistry, Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science, Huang, Wenliang, Einzinger, Markus, Maurano, Andrea, Zhu, Tianyu, Tiepelt, Jan, Yu, Chao, Chae, Hyun Sik, Van Voorhis, Troy, Baldo, Marc A., Buchwald, Stephen L., Massachusetts Institute of Technology. Department of Chemistry, Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science, Huang, Wenliang, Einzinger, Markus, Maurano, Andrea, Zhu, Tianyu, Tiepelt, Jan, Yu, Chao, Chae, Hyun Sik, Van Voorhis, Troy, Baldo, Marc A., and Buchwald, Stephen L.

Published
2022

8. Molecular Design of Deep Blue Thermally Activated Delayed Fluorescence Materials Employing a Homoconjugative Triptycene Scaffold and Dihedral Angle Tuning

Author

Huang, Wenliang, primary, Einzinger, Markus, additional, Zhu, Tianyu, additional, Chae, Hyun Sik, additional, Jeon, Soonok, additional, Ihn, Soo-Ghang, additional, Sim, Myungsun, additional, Kim, Sunghan, additional, Su, Mingjuan, additional, Teverovskiy, Georgiy, additional, Wu, Tony, additional, Van Voorhis, Troy, additional, Swager, Timothy M., additional, Baldo, Marc A., additional, and Buchwald, Stephen L., additional

Published
2018
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11. Thermally Activated Delayed Fluorescence Materials Based on Homoconjugation Effect of Donor–Acceptor Triptycenes

Author

Massachusetts Institute of Technology. Department of Chemistry, Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science, Swager, Timothy M, Kawasumi, Katsuaki, Wu, Tony C, Zhu, Tianyu, Van Voorhis, Troy, Baldo, Marc A, Chae, Hyun Sik, Massachusetts Institute of Technology. Department of Chemistry, Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science, Swager, Timothy M, Kawasumi, Katsuaki, Wu, Tony C, Zhu, Tianyu, Van Voorhis, Troy, Baldo, Marc A, and Chae, Hyun Sik

Abstract

Donor–acceptor triptycences, TPA-QNX(CN)2 and TPA-PRZ(CN)2, were synthesized and their emissive properties were studied. They exhibited a blue-green fluorescence with emission lifetimes on the order of a microsecond in cyclohexane at room temperature. The long lifetime emission is quenched by O[subscript 2] and is attributed to thermally activated delayed florescence (TADF). Unimolecular TADF is made possible by the separation and weak coupling due to homoconjugation of the HOMO and LUMO on different arms of the three-dimensional donor–acceptor triptycene. Organic light emitting devices (OLEDs) were fabricated using TPA-QNX(CN)2 and TPA-PRZ(CN)2 as emitters which displayed electroluminescence with efficiencies as high as 9.4% EQE., Samsung (Firm), Japan Society for the Promotion of Science

Published
2017

12. Design of efficient molecular organic light-emitting diodes by a high-throughput virtual screening and experimental approach

Author

Gómez-Bombarelli, Rafael, primary, Aguilera-Iparraguirre, Jorge, additional, Hirzel, Timothy D., additional, Duvenaud, David, additional, Maclaurin, Dougal, additional, Blood-Forsythe, Martin A., additional, Chae, Hyun Sik, additional, Einzinger, Markus, additional, Ha, Dong-Gwang, additional, Wu, Tony, additional, Markopoulos, Georgios, additional, Jeon, Soonok, additional, Kang, Hosuk, additional, Miyazaki, Hiroshi, additional, Numata, Masaki, additional, Kim, Sunghan, additional, Huang, Wenliang, additional, Hong, Seong Ik, additional, Baldo, Marc, additional, Adams, Ryan P., additional, and Aspuru-Guzik, Alán, additional

Published
2016
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