H
Hyun Kyu Kim
Researcher at Chonbuk National University
Publications - 73
Citations - 972
Hyun Kyu Kim is an academic researcher from Chonbuk National University. The author has contributed to research in topics: Light-emitting diode & Light extraction in LEDs. The author has an hindex of 16, co-authored 69 publications receiving 879 citations. Previous affiliations of Hyun Kyu Kim include Kyushu University.
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Journal ArticleDOI
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,Chang-Hee Hong +14 more
TL;DR: It is demonstrated 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.
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Atmospheric pressure argon plasma jet using a cylindrical piezoelectric transformer
TL;DR: In this paper, a low-voltage atmospheric pressure nonthermal argon plasma jet using a circular piezoelectric transducer is proposed, where an Ar plasma flame is generated at an input voltage of 87 V.
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Work-function-tuned multilayer graphene as current spreading electrode in blue light-emitting diodes
S. Chandramohan,Ji Hye Kang,Y. S. Katharria,Nam Han,Yun Seon Beak,Kang Bok Ko,Jong Bae Park,Hyun Kyu Kim,Eun-Kyung Suh,Chang-Hee Hong +9 more
TL;DR: In this paper, multilayer graphene (MLG) was used as a current spreading electrode in GaN-based blue light-emitting diodes, and two facile strategies to maneuver the electrical coupling between p-GaN layer and MLG were demonstrated.
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Modulating Electronic Properties of Monolayer MoS2 via Electron-Withdrawing Functional Groups of Graphene Oxide
Hye Min Oh,Hyun Jeong,Gang Hee Han,Hyun Kyu Kim,Jung Ho Kim,Si Young Lee,Seung Yol Jeong,Sooyeon Jeong,Doo Jae Park,Ki Kang Kim,Young Hee Lee,Mun Seok Jeong +11 more
TL;DR: The tuning of the electronic properties of large-area 1L-MoS2 using graphene oxide (GO) is demonstrated, indicating that the electronic structure of MoS2 is significantly modulated by the electron-withdrawing functional group of GO.
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Comparison of various surface textured layer in InGaN LEDs for high light extraction efficiency
Ji Hye Kang,Jae Hyoung Ryu,Hyun Kyu Kim,Hee Yun Kim,Nam Han,Young Jae Park,Periyayya Uthirakumar,Chang-Hee Hong +7 more
TL;DR: The various surface texturing effects of InGaN light emitting diodes (LEDs) have been investigated by comparison of experimented data and simulated data and p-type GaN layer texturing was more effective than ITO ohmic contact layer textured.