Joosun Yun
Joosun Yun
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Analysis of efficiency droop in 280-nm AlGaN multiple-quantum-well light-emitting diodes based on carrier rate equation
J Yun, JI Shim, H Hirayama
Applied Physics Express 8 (2), 022104, 2015
Investigation of the light-extraction efficiency in 280 nm AlGaN-based light-emitting diodes having a highly transparent p-AlGaN layer
J Yun, H Hirayama
Journal of Applied Physics 121 (1), 013105, 2017
Achieving 9.6% efficiency in 304 nm p-AlGaN UVB LED via increasing the holes injection and light reflectance
MA Khan, N Maeda, J Yun, M Jo, Y Yamada, H Hirayama
Scientific reports 12 (1), 2591, 2022
Enhancing the light-extraction efficiency of AlGaN deep-ultraviolet light-emitting diodes using highly reflective Ni/Mg and Rh as p-type electrodes
N Maeda, J Yun, M Jo, H Hirayama
Japanese Journal of Applied Physics 57 (4S), 04FH08, 2018
Investigation of dominant nonradiative mechanisms as a function of current in InGaN/GaN light-emitting diodes
IG Choi, DP Han, J Yun, KS Kim, DS Shin, JI Shim
Applied physics express 6 (5), 052105, 2013
Graphene interlayer for current spreading enhancement by engineering of barrier height in GaN-based light-emitting diodes
JH Min, M Son, SY Bae, JY Lee, J Yun, MJ Maeng, DG Kwon, Y Park, ...
Optics express 22 (104), A1040-A1050, 2014
Broadening mechanisms and self-consistent gain calculations for GaN quantum cascade laser structures
K Wang, T Grange, TT Lin, L Wang, Z Jéhn, S Birner, J Yun, W Terashima, ...
Applied Physics Letters 113 (6), 2018
Enhancing current spreading by simple electrode pattern design methodology in lateral GaN/InGaN LEDs
JS Yun, JI Shim, DS Shin
Electronics letters 45 (13), 703-705, 2009
Reflectance of a reflective photonic crystal p-contact layer for improving the light-extraction efficiency of AlGaN-based deep-ultraviolet light-emitting diodes
J Yun, Y Kashima, H Hirayama
AIP Advances 8 (12), 2018
Investigation of light-extraction efficiency of flip-chip AlGaN-based deep-ultraviolet light-emitting diodes adopting AlGaN metasurface
J Yun, H Hirayama
IEEE Photonics Journal 13 (1), 1-13, 2021
Current spreading analysis in vertical electrode GaN-based blue LEDs
JS Yun, SM Hwang, JI Shim
Solid State Lighting and Solar Energy Technologies 6841, 136-143, 2008
Correlation between the efficiency droop and the blueshift of the electroluminescence in InGaN/GaN multiple-quantum-well blue light-emitting diodes
J Yun, HS Yeom, JI Shim, DS Shin
Journal of the Korean Physical Society 63, 1218-1221, 2013
Current, voltage and temperature distribution modeling of light-emitting diodes based on electrical and thermal circuit analysis
J Yun, JI Shim, DS Shin
Semiconductor science and technology 28 (8), 085001, 2013
Three-dimensional analysis of temperature distributions based on circuit modeling of light-emitting diodes
J Yun, DP Han, JI Shim, DS Shin
IEEE transactions on electron devices 59 (6), 1799-1802, 2012
Current spreading and its related issues in GaN-based light emitting diodes
JI Shim, J Yun, H Kim
Gallium Nitride Materials and Devices IV 7216, 161-169, 2009
Optical and Electrical Characteristics of GaN-based Blue LEDs after Low-current Stress
S Kim, J Yun, DS Shin, JI Shim
Korean Journal of Optics and Photonics 23 (2), 64-70, 2012
Surface-emitting photonic crystal terahertz quantum cascade laser adopting uniform triangular prism photonic crystal with a double-metal waveguide
J Yun, TT Lin, H Hirayama
Japanese Journal of Applied Physics 61 (6), 062001, 2022
Random electric field induced by interface roughness in GaN/AlxGa1− xN multiple quantum wells
J Yun, DP Han, H Hirayama
Applied Physics Express 12 (12), 124005, 2019
AlGaN metasurface to increase the light-extraction efficiency of deep ultraviolet light-emitting diodes by perfect transmittance before critical angle
J Yun, H Hirayama
Metamaterials XII 11344, 10-16, 2020
Reflectance of Reflective Photonic Crystal on P-contact Layer of AlGaN Deep-UV LED
J Yun, Y Kashima, H Hirayama
JSAP Annual Meetings Extended Abstracts The 79th JSAP Autumn Meeting 2018 …, 2018
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