Large-area transparent conductive few-layer graphene electrode in GaN-based ultra-violet light-emitting diodes

Byung Jae Kim; Chongmin Lee; Younghun Jung; Kwang Hyeon Baik; Michael A. Mastro; Jennifer K. Hite; Charles R. Eddy; Jihyun Kim

doi:10.1063/1.3644496

Large-area transparent conductive few-layer graphene electrode in GaN-based ultra-violet light-emitting diodes

Byung Jae Kim, Chongmin Lee, Younghun Jung, Kwang Hyeon Baik, Michael A. Mastro, Jennifer K. Hite, Charles R. Eddy, Jihyun Kim

Research output: Contribution to journal › Article › peer-review

106 Citations (Scopus)

Abstract

We report on the development of a large-area few-layer graphene (FLG)-based transparent conductive electrode as a current spreading layer for GaN-based ultraviolet (UV) light-emitting diodes (LEDs). Large-area FLG was deposited on Cu using the chemical vapor deposition (CVD) method and subsequently transferred to the surface of the UV LED. UV light at a peak of 372 nm was emitted through the FLG-based transparent conductive electrode. The current spreading effects of FLG were clearly evident in both the optical images of electroluminescence (EL) and current-voltage (I-V) characteristics. Degradation of the FLG-based transparent conductive electrode could be induced by high power operation. Our results indicate that a large-area FLG-based electrode on GaN offers excellent current spreading and ultra-violet transparency properties when compared to the standard optoelectronic indium tin oxide (ITO) contact layer.

Original language	English
Article number	143101
Journal	Applied Physics Letters
Volume	99
Issue number	14
DOIs	https://doi.org/10.1063/1.3644496
Publication status	Published - 2011 Oct 3

Bibliographical note

Funding Information:
The research at Korea University was supported by New & Renewable Energy R&D program (R0903962) under the Ministry of Knowledge Economy, Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Minstry of Education, Science and Technology (2009-0088551 and 2010-0008242) and LG Innotek-Korea University Nano-Photonics Program. Research at the US Naval Research Lab is supported by the Office of Naval Research.

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Large-area transparent conductive few-layer graphene electrode in GaN-based ultra-violet light-emitting diodes",

abstract = "We report on the development of a large-area few-layer graphene (FLG)-based transparent conductive electrode as a current spreading layer for GaN-based ultraviolet (UV) light-emitting diodes (LEDs). Large-area FLG was deposited on Cu using the chemical vapor deposition (CVD) method and subsequently transferred to the surface of the UV LED. UV light at a peak of 372 nm was emitted through the FLG-based transparent conductive electrode. The current spreading effects of FLG were clearly evident in both the optical images of electroluminescence (EL) and current-voltage (I-V) characteristics. Degradation of the FLG-based transparent conductive electrode could be induced by high power operation. Our results indicate that a large-area FLG-based electrode on GaN offers excellent current spreading and ultra-violet transparency properties when compared to the standard optoelectronic indium tin oxide (ITO) contact layer.",

author = "Kim, {Byung Jae} and Chongmin Lee and Younghun Jung and {Hyeon Baik}, Kwang and Mastro, {Michael A.} and Hite, {Jennifer K.} and Eddy, {Charles R.} and Jihyun Kim",

note = "Funding Information: The research at Korea University was supported by New & Renewable Energy R&D program (R0903962) under the Ministry of Knowledge Economy, Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Minstry of Education, Science and Technology (2009-0088551 and 2010-0008242) and LG Innotek-Korea University Nano-Photonics Program. Research at the US Naval Research Lab is supported by the Office of Naval Research. ",

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AU - Kim, Byung Jae

AU - Lee, Chongmin

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AU - Hyeon Baik, Kwang

AU - Mastro, Michael A.

AU - Hite, Jennifer K.

AU - Eddy, Charles R.

AU - Kim, Jihyun

N1 - Funding Information: The research at Korea University was supported by New & Renewable Energy R&D program (R0903962) under the Ministry of Knowledge Economy, Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Minstry of Education, Science and Technology (2009-0088551 and 2010-0008242) and LG Innotek-Korea University Nano-Photonics Program. Research at the US Naval Research Lab is supported by the Office of Naval Research.

PY - 2011/10/3

Y1 - 2011/10/3

N2 - We report on the development of a large-area few-layer graphene (FLG)-based transparent conductive electrode as a current spreading layer for GaN-based ultraviolet (UV) light-emitting diodes (LEDs). Large-area FLG was deposited on Cu using the chemical vapor deposition (CVD) method and subsequently transferred to the surface of the UV LED. UV light at a peak of 372 nm was emitted through the FLG-based transparent conductive electrode. The current spreading effects of FLG were clearly evident in both the optical images of electroluminescence (EL) and current-voltage (I-V) characteristics. Degradation of the FLG-based transparent conductive electrode could be induced by high power operation. Our results indicate that a large-area FLG-based electrode on GaN offers excellent current spreading and ultra-violet transparency properties when compared to the standard optoelectronic indium tin oxide (ITO) contact layer.

AB - We report on the development of a large-area few-layer graphene (FLG)-based transparent conductive electrode as a current spreading layer for GaN-based ultraviolet (UV) light-emitting diodes (LEDs). Large-area FLG was deposited on Cu using the chemical vapor deposition (CVD) method and subsequently transferred to the surface of the UV LED. UV light at a peak of 372 nm was emitted through the FLG-based transparent conductive electrode. The current spreading effects of FLG were clearly evident in both the optical images of electroluminescence (EL) and current-voltage (I-V) characteristics. Degradation of the FLG-based transparent conductive electrode could be induced by high power operation. Our results indicate that a large-area FLG-based electrode on GaN offers excellent current spreading and ultra-violet transparency properties when compared to the standard optoelectronic indium tin oxide (ITO) contact layer.

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Large-area transparent conductive few-layer graphene electrode in GaN-based ultra-violet light-emitting diodes

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