Improved heat dissipation in gallium nitride light-emitting diodes with embedded graphene oxide pattern

Nam Han, Tran Viet Cuong, Min Han, Beo Deul Ryu, S. Chandramohan, Jong Bae Park, Ji Hye Kang, Young-Jae Park, Kang Bok Ko, Hee Yun Kim, Hyun Kyu Kim, Jae Hyoung Ryu, Y. S. Katharria, Chel-Jong Choi and Chang-Hee Hong ()
Additional contact information
Nam Han: School of Semiconductor and Chemical Engineering, Semiconductor Physics Research Center, Chonbuk National University
Tran Viet Cuong: Ho Chi Minh National University - College of Natural Sciences
Min Han: School of Semiconductor and Chemical Engineering, Semiconductor Physics Research Center, Chonbuk National University
Beo Deul Ryu: School of Semiconductor and Chemical Engineering, Semiconductor Physics Research Center, Chonbuk National University
S. Chandramohan: School of Semiconductor and Chemical Engineering, Semiconductor Physics Research Center, Chonbuk National University
Jong Bae Park: Korea Basic Science Institute (KBSI), Jeonju Center
Ji Hye Kang: School of Semiconductor and Chemical Engineering, Semiconductor Physics Research Center, Chonbuk National University
Young-Jae Park: School of Semiconductor and Chemical Engineering, Semiconductor Physics Research Center, Chonbuk National University
Kang Bok Ko: School of Semiconductor and Chemical Engineering, Semiconductor Physics Research Center, Chonbuk National University
Hee Yun Kim: School of Semiconductor and Chemical Engineering, Semiconductor Physics Research Center, Chonbuk National University
Hyun Kyu Kim: School of Semiconductor and Chemical Engineering, Semiconductor Physics Research Center, Chonbuk National University
Jae Hyoung Ryu: School of Semiconductor and Chemical Engineering, Semiconductor Physics Research Center, Chonbuk National University
Y. S. Katharria: School of Semiconductor and Chemical Engineering, Semiconductor Physics Research Center, Chonbuk National University
Chel-Jong Choi: School of Semiconductor and Chemical Engineering, Semiconductor Physics Research Center, Chonbuk National University
Chang-Hee Hong: School of Semiconductor and Chemical Engineering, Semiconductor Physics Research Center, Chonbuk National University

Nature Communications, 2013, vol. 4, issue 1, 1-8

Abstract: Abstract The future of solid-state lighting relies on how the performance parameters will be improved further for developing high-brightness light-emitting diodes. Eventually, heat removal is becoming a crucial issue because the requirement of high brightness necessitates high-operating current densities that would trigger more joule heating. Here we demonstrate that the embedded graphene oxide in a gallium nitride light-emitting diode alleviates the self-heating issues by virtue of its heat-spreading ability and reducing the thermal boundary resistance. The fabrication process involves the generation of scalable graphene oxide microscale patterns on a sapphire substrate, followed by its thermal reduction and epitaxial lateral overgrowth of gallium nitride in a metal-organic chemical vapour deposition system under one-step process. The device with embedded graphene oxide outperforms its conventional counterpart by emitting bright light with relatively low-junction temperature and thermal resistance. This facile strategy may enable integration of large-scale graphene into practical devices for effective heat removal.

Date: 2013
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DOI: 10.1038/ncomms2448

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