People
Here are the directions to
Yonsei University.
Professor
Hwan-Hee Cho
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Mailstop
Room 319, The 2nd Engineering Building Dept. of Materials Science and Engineering, Yonsei University
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Phone
02-2123-2839
Education
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2019 - 2022
Ph.D. in Physics, University of Cambridge
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2007 - 2009
M.S. in Materials Science and Engineering, Seoul National University
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2001 - 2005
B.S. in Materials Science and Engineering, Hanyang University
Career
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2025 - Present
Assistant Professor, Yonsei University
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2022 - 2024
Postdoctoral researcher, University of Cambridge
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2012 - 2018
Engineer/Senior Engineer, Samsung Display
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2010 - 2012
Engineer, Samsung Mobile Display
Research Interests
Our research group focuses on research for energy-efficient and stable organic semiconductor materials and optoelectronic devices.
1) Design of novel light-emitting systems
- Fluorescence, Phosphorescence, TADF, MR-TADF, Hyperfluorescence, doublet fluorescence, circularly polarized luminescence
- Optimization of host-guest combinations and energy transfer systems
2) Device physics and characterization of OLEDs
- Design, fabrication, characterization, and analysis of devices
- Time-resolved EL analysis, magnetic field dependence
3) Photophysics of organic semicondcutors
- Steady-state and time-resolved spectroscopy
- Exciton dynamics, kinetics, and energy transfer
4) Emerging classes of organic semicoductors for optoelectronic devices
- Coinage metal complexes, organic radicals, chiral organic semiconductors, supramolecular assembly
5) Photon upconversion, singlet fission, dipole orientation
6) Other OLED device structures and systems
- White, tandem, cavity, inverted structures, solution process
1) Design of novel light-emitting systems
- Fluorescence, Phosphorescence, TADF, MR-TADF, Hyperfluorescence, doublet fluorescence, circularly polarized luminescence
- Optimization of host-guest combinations and energy transfer systems
2) Device physics and characterization of OLEDs
- Design, fabrication, characterization, and analysis of devices
- Time-resolved EL analysis, magnetic field dependence
3) Photophysics of organic semicondcutors
- Steady-state and time-resolved spectroscopy
- Exciton dynamics, kinetics, and energy transfer
4) Emerging classes of organic semicoductors for optoelectronic devices
- Coinage metal complexes, organic radicals, chiral organic semiconductors, supramolecular assembly
5) Photon upconversion, singlet fission, dipole orientation
6) Other OLED device structures and systems
- White, tandem, cavity, inverted structures, solution process
Selected Publications
1) ‘Efficient near-infrared organic light-emitting diodes with emission from spin doublet excitons’ Nature Photonics, 18, 905-912 (2024)
2) ‘Suppression of Dexter transfer by covalent encapsulation for efficient matrix-free narrowband deep blue hyperfluorescent OLEDs’ Nature Materials, 23, 519–526 (2024) (The front cover of the issue)
3) ‘Efficient and Bright Organic Radical Light-Emitting Diodes with Low Efficiency Roll-Off’, Advanced Materials, 35, 2303666 (2023)
4) ‘Deep-blue and Fast Delayed Fluorescence from Carbene-Metal-Amides for Highly Efficient and Stable Organic Light-Emitting Diodes’ Advanced Materials, 2404357 (2024)
5) ‘Near-infrared Light-Emitting Diodes from Organic Radicals with Charge Control’ Advanced Optical Materials, 10, 2200628 (2022)
6) ‘Matrix-free Hyperfluorescent Organic Light-Emitting Diodes Based on Carbene-Metal-Amides’ Advanced Optical Materials, 9, 2001965 (2021)
7) 'Circularly polarized electroluminescence from chiral supramolecular semiconductor thin films' Science, 387, 1175-1181 (2025)
8) ‘Phosphorescent Carbene-Gold-Arylacetylide Materials as Emitters for Near UV-OLEDs’ Advanced Materials, 36, 2306249 (2024)
2) ‘Suppression of Dexter transfer by covalent encapsulation for efficient matrix-free narrowband deep blue hyperfluorescent OLEDs’ Nature Materials, 23, 519–526 (2024) (The front cover of the issue)
3) ‘Efficient and Bright Organic Radical Light-Emitting Diodes with Low Efficiency Roll-Off’, Advanced Materials, 35, 2303666 (2023)
4) ‘Deep-blue and Fast Delayed Fluorescence from Carbene-Metal-Amides for Highly Efficient and Stable Organic Light-Emitting Diodes’ Advanced Materials, 2404357 (2024)
5) ‘Near-infrared Light-Emitting Diodes from Organic Radicals with Charge Control’ Advanced Optical Materials, 10, 2200628 (2022)
6) ‘Matrix-free Hyperfluorescent Organic Light-Emitting Diodes Based on Carbene-Metal-Amides’ Advanced Optical Materials, 9, 2001965 (2021)
7) 'Circularly polarized electroluminescence from chiral supramolecular semiconductor thin films' Science, 387, 1175-1181 (2025)
8) ‘Phosphorescent Carbene-Gold-Arylacetylide Materials as Emitters for Near UV-OLEDs’ Advanced Materials, 36, 2306249 (2024)