Improved heat dissipation in gallium nitride light-emitting diodes with embedded graphene oxide pattern N Han, T Viet Cuong, M Han, B Deul Ryu, S Chandramohan, J Bae Park, ...
Nature communications 4 (1), 1452, 2013
214 2013 Work-function-tuned multilayer graphene as current spreading electrode in blue light-emitting diodes S Chandramohan, J Hye Kang, YS Katharria, N Han, Y Seon Beak, ...
Applied Physics Letters 100 (2), 023502, 2012
61 2012 Comparison of various surface textured layer in InGaN LEDs for high light extraction efficiency JH Kang, JH Ryu, HK Kim, HY Kim, N Han, YJ Park, P Uthirakumar, ...
Optics express 19 (4), 3637-3646, 2011
49 2011 Impact of Interlayer Processing Conditions on the Performance of GaN Light-Emitting Diode with Specific NiOx S Chandramohan, JH Kang, BD Ryu, JH Yang, S Kim, H Kim, JB Park, ...
ACS Applied Materials & Interfaces 5 (3), 958-964, 2013
38 2013 Chemically modified multilayer graphene with metal interlayer as an efficient current spreading electrode for InGaN/GaN blue light-emitting diodes S Chandramohan, JH Kang, YS Katharria, N Han, YS Beak, KB Ko, ...
Journal of Physics D: Applied Physics 45 (14), 145101, 2012
38 2012 DFB laser diodes based on GaN using 10th order laterally coupled surface gratings JH Kang, H Wenzel, V Hoffmann, E Freier, L Sulmoni, RS Unger, ...
IEEE Photonics Technology Letters 30 (3), 231-234, 2017
33 2017 Impact of two-floor air prism arrays as an embedded reflector for enhancing the output power of InGaN/GaN light emitting diodes HG Kim, HK Kim, HY Kim, JH Ryu, JH Kang, N Han, P Uthirakumar, ...
Applied Physics Letters 95 (22), 221110, 2009
25 2009 Nanoscale ITO/ZnO layer-texturing for high-efficiency InGaN/GaN light emitting diodes P Uthirakumar, JH Kang, BD Ryu, HG Kim, HK Kim, CH Hong
Materials Science and Engineering: B 166 (3), 230-234, 2010
24 2010 High performance of InGaN light-emitting diodes by air-gap/GaN distributed Bragg reflectors JH Ryu, HY Kim, HK Kim, YS Katharria, N Han, JH Kang, YJ Park, M Han, ...
Optics Express 20 (9), 9999-10003, 2012
22 2012 Synthesis and improved luminescence properties of OLED/ZnO hybrid materials U Periyayya, JH Kang, JH Ryu, CH Hong
Vacuum 86 (3), 254-260, 2011
22 2011 Improvement of light output power in InGaN/GaN light-emitting diodes with a nanotextured GaN surface using indium tin oxide nanospheres JH Kang, HG Kim, HK Kim, HY Kim, JH Ryu, P Uthirakumar, N Han, ...
Japanese Journal of Applied Physics 48 (10R), 102104, 2009
22 2009 The different types of ZnO materials on the performance of dye-sensitized solar cells P Uthirakumar, JH Kang, S Senthilarasu, CH Hong
Physica E: Low-dimensional Systems and Nanostructures 43 (9), 1746-1750, 2011
19 2011 Enhanced light output power of GaN-based light-emitting diodes by nano-rough indium tin oxide film using ZnO nanoparticles B Deul Ryu, P Uthirakumar, J Hye Kang, B Jun Kwon, S Chandramohan, ...
Journal of Applied Physics 109 (9), 093116, 2011
18 2011 Enhancement of light output power in InGaN/GaN LEDs with nanoroughed hemispherical indium tin oxide transparent ohmic contacts JH Kang, HG Kim, JH Ryu, HK Kim, HY Kim, J Joo, MS Lee, YJ Park, ...
Electrochemical and Solid-State Letters 13 (2), D1, 2009
18 2009 Continuous-wave operation of DFB laser diodes based on GaN using 10th -order laterally coupled surface gratings JH Kang, H Wenzel, E Freier, V Hoffmann, O Brox, J Fricke, L Sulmoni, ...
Optics letters 45 (4), 935-938, 2020
16 2020 Optically pumped DFB lasers based on GaN using 10th-order laterally coupled surface gratings JH Kang, M Martens, H Wenzel, V Hoffmann, W John, S Einfeldt, ...
IEEE Photonics Technology Letters 29 (1), 138-141, 2016
16 2016 Stress-relaxed growth of n-GaN epilayers JH Ryu, YS Katharria, HY Kim, HK Kim, KB Ko, N Han, JH Kang, YJ Park, ...
Applied Physics Letters 100 (18), 181904, 2012
16 2012 Enhancement of light output power in GaN-based light-emitting diodes using indium tin oxide films with nanoporous structures JH Kang, JH Ryu, HK Kim, HY Kim, N Han, MS Lee, YJ Park, ...
Thin Solid Films 520 (1), 437-441, 2011
16 2011 Effect of embedded silica nanospheres on improving the performance of InGaN/GaN light-emitting diodes YJ Park, HY Kim, JH Ryu, HK Kim, JH Kang, N Han, M Han, H Jeong, ...
Optics Express 19 (3), 2029-2036, 2011
15 2011 Stimulated N-doping of reduced graphene oxide on GaN under excimer laser reduction process BD Ryu, N Han, M Han, S Chandramohan, YJ Park, KB Ko, JB Park, ...
Materials Letters 116, 412-415, 2014
14 2014 