Withers, F., Del Pozo-Zamudio, O., Mishchenko, A. et al. (8 more authors) (2015) Light-emitting diodes by band-structure engineering in van der Waals heterostructures. NATURE MATERIALS, 14 (3). pp. 301-306. ISSN 1476-1122
Abstract
The advent of graphene and related 2D materials has recently led to a new technology: heterostructures based on these atomically thin crystals.The paradigm proved itself extremely versatile and led to rapid demonstration of tunnelling diodes with negative di�erential resistance tunnelling transistors photovoltaic devices and so on. Here, we take the complexity and functionality of such van der Waals heterostructures to the next level by introducing quantum wells (QWs) engineered with one atomic plane precision. We describe light-emitting diodes (LEDs) made by stacking metallic graphene, insulating hexagonal boron nitride and various semiconducting monolayers into complex but carefully designed sequences. Our first devices already exhibit an extrinsic quantum e�ciency of nearly 10% and the emission can be tuned over a wide range of frequencies by appropriately choosing and combining 2D semiconductors (monolayers of transition metal dichalcogenides). By preparing the heterostructures on elastic and transparent substrates, we show that they can also provide the basis for flexible and semi-transparent electronics. The range of functionalities for the demonstrated heterostructures is expected to grow further on increasing the number of available 2D crystals and improving their electronic quality.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 015 Macmillan Publishers Limited. This is an author produced version of a paper subsequently published in Nature Materials. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 08 May 2017 11:18 |
Last Modified: | 24 Mar 2018 15:46 |
Published Version: | https://doi.org/10.1038/nmat4205 |
Status: | Published |
Publisher: | Nature Publishing Group |
Refereed: | Yes |
Identification Number: | 10.1038/nmat4205 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:115772 |