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Review

Graphene as a Transparent Conductive Electrode in GaN-Based LEDs

Werkstoffe der Elektrotechnik and CENIDE, Universität Duisburg-Essen, 47057 Duisburg, Germany
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Academic Editor: P. Davide Cozzoli
Materials 2022, 15(6), 2203; https://doi.org/10.3390/ma15062203
Received: 31 January 2022 / Revised: 23 February 2022 / Accepted: 26 February 2022 / Published: 16 March 2022
(This article belongs to the Special Issue Optoelectronic Devices: 2021)
Graphene combines high conductivity (sheet resistance down to a few hundred Ω/sq and even less) with high transparency (>90%) and thus exhibits a huge application potential as a transparent conductive electrode in gallium nitride (GaN)-based light-emitting diodes (LEDs), being an economical alternative to common indium-based solutions. Here, we present an overview of the state-of-the-art graphene-based transparent conductive electrodes in GaN-based LEDs. The focus is placed on the manufacturing progress and the resulting properties of the fabricated devices. Transferred as well as directly grown graphene layers are considered. We discuss the impact of graphene-based transparent conductive electrodes on current spreading and contact resistance, and reveal future challenges and perspectives on the use of graphene in GaN-based LEDs. View Full-Text
Keywords: graphene; GaN; LED; CVD; contact resistance; transparency; current spreading graphene; GaN; LED; CVD; contact resistance; transparency; current spreading
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MDPI and ACS Style

Zhang, H.; Mischke, J.; Mertin, W.; Bacher, G. Graphene as a Transparent Conductive Electrode in GaN-Based LEDs. Materials 2022, 15, 2203. https://doi.org/10.3390/ma15062203

AMA Style

Zhang H, Mischke J, Mertin W, Bacher G. Graphene as a Transparent Conductive Electrode in GaN-Based LEDs. Materials. 2022; 15(6):2203. https://doi.org/10.3390/ma15062203

Chicago/Turabian Style

Zhang, Hehe, Jan Mischke, Wolfgang Mertin, and Gerd Bacher. 2022. "Graphene as a Transparent Conductive Electrode in GaN-Based LEDs" Materials 15, no. 6: 2203. https://doi.org/10.3390/ma15062203

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