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Shin, Hyeon Suk
Lab for Carbon and 2D Materials
Research Interests
  • Two-dimensional materials: graphene, transition metal dichalcogenides, h-BN, and their heterostructures

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Blue emission at atomically sharp 1D heterojunctions between graphene and h-BN

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Title
Blue emission at atomically sharp 1D heterojunctions between graphene and h-BN
Author
Kim, GwangwooMa, Kyung YeolPark,MinsuKim, MinsuJeon, JonghyukSong, JinoukBarrios-Vargas, José EduardoSato, YutaLin, Yung-ChangSuenaga, KazuRoche, StephanYoo, SeunghyupSohn, Byeong-HyeokJeon, SeokwooShin, Hyeon Suk
Issue Date
2020-10
Publisher
NATURE RESEARCH
Citation
NATURE COMMUNICATIONS, v.11, no.1, pp.5359
Abstract
Atomically sharp heterojunctions in lateral two-dimensional heterostructures can provide the narrowest one-dimensional functionalities driven by unusual interfacial electronic states. For instance, the highly controlled growth of patchworks of graphene and hexagonal boron nitride (h-BN) would be a potential platform to explore unknown electronic, thermal, spin or optoelectronic property. However, to date, the possible emergence of physical properties and functionalities monitored by the interfaces between metallic graphene and insulating h-BN remains largely unexplored. Here, we demonstrate a blue emitting atomic-resolved heterojunction between graphene and h-BN. Such emission is tentatively attributed to localized energy states formed at the disordered boundaries of h-BN and graphene. The weak blue emission at the heterojunctions in simple in-plane heterostructures of h-BN and graphene can be enhanced by increasing the density of the interface in graphene quantum dots array embedded in the h-BN monolayer. This work suggests that the narrowest, atomically resolved heterojunctions of in-plane two-dimensional heterostructures provides a future playground for optoelectronics. Here, the authors explore the blue photoluminescence signal arising from the interface between graphene and h-BN arranged in in-plane heterostructures, and fabricate a blue light emitting device utilizing the heterojunction as the emitting layer.
URI
https://scholarworks.unist.ac.kr/handle/201301/48796
URL
https://www.nature.com/articles/s41467-020-19181-2
DOI
10.1038/s41467-020-19181-2
ISSN
2041-1723
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CHM_Journal Papers
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