1) Jungel Ryu et al., “Epitaxial lateral overgrowth of GaN on partially crystallized cavity engineered sapphire substrate", 13th International Conference on Nitride Semiconductors (ICNS-13), Hyatt Regency Bellevue, Washington, United States, 2019.07.8 (Poster) 

2) Jungel Ryu et al., “A discrete core-shell-like micro-LED array grown on sapphire nano-membrane", International Union of Materials Research Societies - International Conference in Asia 2021 (IUMRS-ICA 2021), ICC Jeju, Jeju, Korea, 2021.10.06 (Oral) 

3) Jungel Ryu et al., “A discrete core-shell-like micro-LED array grown on sapphire nano-membrane", 12th Recent Progress in Graphene and Two-dimensional Materials Research Conference (RPGR 2021), Yonsei University, Seoul, Korea, 2021.10.13 (Poster)

4) Jungel Ryu et al., “Fabrication of high efficiency micro-LED display by using sapphire nano-membrane", 7th International Conference on Electronic Materials and Nanotechnology for Green Environment, Ramada Jeju Hotel, Jeju, Korea, 2022.11.09 (Oral)

5) Jungel Ryu et al., “Size tunable high-efficiency micro-LED array grown on sapphire nano-membrane template", 2022 Materials Research Society Fall Meeting, Hynes convention center, Boston, Massachusetts, United States, 2022.11.29 (Oral)

6) Jungel Ryu et al., “Visible light activated gas sensor array on micro-LED platform ", 18th International Conference on Nano/Micro Engineered and Molecular Systems, Ramada Jeju Hotel, Jeju, Korea, 2023.05.15 (Poster)

7) Jungel Ryu et al., "Remote epitaxy-assisted mixed-dimensional integration of 3D complex-oxides and 2D materials", 2023 Materials Research Society Fall Meeting, Hynes convention center, Boston, Massachusetts, United States, 2023.11.28 (Oral)

1) Jungel Ryu et al., “Analysis of plasma-treated sapphire surface and its effect on crystallized Al2O3 quality", 1st Korea Society of LEDs and Optoelectronics, Advanced Institute of Convergence Technology, Suwon, 2018.02.21 (Poster) 

2) Jungel Ryu et al., “Analysis of plasma-treated sapphire surface and its effect on crystallized Al2O3 quality", 2nd Korea Society of LEDs and Optoelectronics, Kimdaejung Convention Center, Gwangju, 2018.08.21 (Poster) 

3) Jungel Ryu et al., “Epitaxial lateral overgrowth of GaN on partially crystallized cavity engineered sapphire substrate", 3rd Korea Society of LEDs and Optoelectronics, Chunma Arts Center, Gyeongsan, 2019.02.20 (Oral)

4) Jungel Ryu et al., “Epitaxial lateral overgrowth of GaN on partially crystallized cavity engineered sapphire substrate", 5th Korea Society of LEDs and Optoelectronics, Advanced Institute of Convergence Technology, Suwon, 2020.12.01 (Poster) 

5) Jungel Ryu et al., “A core-shell-like high efficiency micro-LED array grown on sapphire nano-membrane", KIEEME Annual Summer Conference 2021, Alpensia Resort Convention Hotel, Pyeongchang, 2021.06.30 (Poster) 

6) Jungel Ryu et al., “A core-shell-like high efficiency micro-LED array grown on sapphire nano-membrane", 6th Korea Society of LEDs and Optoelectronics, Online conference, 2021.08.20 (Oral) 

7) Jungel Ryu et al., “Highly sensitive and selective NO2 gas sensor based on Graphene/SnS2 nanocomposite ", 2022 Spring Conference of the Korean Sensors Society, The Coex Exhibition Hall, Seoul, 2022.04.06 (Poster) 

8) Jungel Ryu et al., “Fabrication of high efficiency micro-LED display by using sapphire nano-membrane", KIEEME Annual Summer Conference 2022, Alpensia Resort Convention Hotel, Pyeongchang, 2022.06.23 (Poster) 

9) Jungel Ryu et al., “Fabrication of high efficiency micro-LED using sapphire nano-membrane ", 2022 Fall Conference of the Korean Sensors Society, The Ocean Resort, Yeosu, 2022.08.24 (Poster)