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다차원 탄소재료 연구단
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Direct Growth of Nanopatterned Graphene on Sapphire and Its Application in Light Emitting Diodes

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Title
Direct Growth of Nanopatterned Graphene on Sapphire and Its Application in Light Emitting Diodes
Author(s)
Zhaolong Chen; Hongliang Chang; Ting Cheng; Tongbo Wei; Ruoyu Wang; Shenyuan Yang; Zhipeng Dou; Bingyao Liu; Shishu Zhang; Yadian Xie; Zhiqiang Liu; Yanfeng Zhang; Jinmin Li; Feng Ding; Peng Gao; Zhongfan Liu
Subject
chemical vapor deposition, ; dielectric substrates, ; direct growth, ; graphene, ; light emitting diodes
Publication Date
2020-08
Journal
ADVANCED FUNCTIONAL MATERIALS, v.30, no.31, pp.2001483
Publisher
WILEY-V C H VERLAG GMBH
Abstract
© 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Direct growth of graphene films on functional substrates is immensely beneficial for the large-scale applications of graphene by avoiding the transfer-induced issues. Notably, the selective growth of patterned graphene will further boost the development of graphene-based devices. Here, the direct growth of patterned graphene on the c-plane of nanopatterned sapphire substrate (NPSS) is realized and the superiority of the patterned graphene for high-performance ultraviolet light-emitting diodes (UV-LED) is demonstrated. As confirmed by density functional theory calculations and analog simulations, compared to the concave r-plane the flat c-plane of NPSS is characterized by a lower active barrier for methane decomposition and carbon species diffusion, as well as a greater supply of carbon precursor for graphene growth. The synthesized patterned graphene on the c-plane of NPSS is verified to be monolayer and high quality. The patterned graphene enables the selective and well-aligned nucleation of aluminium nitride (AlN) to promote rapid epitaxial lateral overgrowth of single-crystal AlN films with low dislocation density. Consequently, the fabricated UV-LED demonstrates high luminescence intensity and stability. The method is suitable for obtaining various patterned graphene by substrate design, which will allow for greater progress in the cutting-edge applications of graphene
URI
https://pr.ibs.re.kr/handle/8788114/7716
DOI
10.1002/adfm.202001483
ISSN
1616-301X
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > 1. Journal Papers (저널논문)
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