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Publication . Preprint . Article . 2017

Graphene hot-electron light bulb: incandescence from hBN-encapsulated graphene in air

Seok-Kyun Son; Makars Šiškins; Ciaran Mullan; Jun Yin; Vasyl G. Kravets; Aleksey Kozikov; Servet Ozdemir; +8 Authors
Open Access
English
Abstract

The excellent electronic and mechanical properties of graphene allow it to sustain very large currents, enabling its incandescence through Joule heating in suspended devices. Although interesting scientifically and promising technologically, this process is unattainable in ambient environment, because graphene quickly oxidises at high temperatures. Here, we take the performance of graphene-based incandescent devices to the next level by encapsulating graphene with hexagonal boron nitride (hBN). Remarkably, we found that the hBN encapsulation provides an excellent protection for hot graphene filaments even at temperatures well above 2000 K. Unrivalled oxidation resistance of hBN combined with atomically clean graphene/hBN interface allows for a stable light emission from our devices in atmosphere for many hours of continuous operation. Furthermore, when confined in a simple photonic cavity, the thermal emission spectrum is modified by a cavity mode, shifting the emission to the visible range spectrum. We believe our results demonstrate that hBN/graphene heterostructures can be used to conveniently explore the technologically important high-temperature regime and to pave the way for future optoelectronic applications of graphene-based systems.

Subjects by Vocabulary

Microsoft Academic Graph classification: Photonics business.industry business Continuous operation Joule heating Graphene law.invention law Light emission Heterojunction Incandescence Optoelectronics Incandescent light bulb Materials science

Subjects

Condensed Matter - Mesoscale and Nanoscale Physics, Graphene, hBN-encapsulated graphene, incandescence, Light emitting materials, Hot graphene, ResearchInstitutes_Networks_Beacons/national_graphene_institute, National Graphene Institute, Mechanical Engineering, Mechanics of Materials, Condensed Matter Physics, General Materials Science, General Chemistry, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), FOS: Physical sciences

Funded by
EC| GrapheneCore1
Project
GrapheneCore1
Graphene-based disruptive technologies
  • Funder: European Commission (EC)
  • Project Code: 696656
  • Funding stream: H2020 | SGA-RIA
Validated by funder
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