Ultrathin Ga203 Glass: A Large-Scale Passivation and Protection Material for Monolayer WS2.
Date
2020
Authors
Wurdack, Matthias
Yun, Tinghe
Estrecho, Eliezer
Pieczarka, Maciej
Lockrey, Mark
Lu, Yuerui
Truscott, Andrew
Syed, Nitu
Bhattacharyya, Semonti
Zavabeti, Ali
Journal Title
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Volume Title
Publisher
Wiley-VCH Verlag GMBH
Abstract
Atomically thin transition metal dichalcogenide crystals (TMDCs) have extraordinary optical properties that make them attractive for future optoelectronic applications. Integration of TMDCs into practical all-dielectric heterostructures hinges on the ability to passivate and protect them against necessary fabrication steps on large scales. Despite its limited scalability, encapsulation of TMDCs in hexagonal boron nitride (hBN) currently has no viable alternative for achieving high performance of the final device. Here, it is shown that the novel, ultrathin Ga2O3 glass is an ideal centimeter-scale coating material that enhances optical performance of the monolayers and protects them against further material deposition. In particular, Ga2O3 capping of monolayer WS2 outperforms commercial-grade hBN in both scalability and optical performance at room temperature. These properties make Ga2O3 highly suitable for large-scale passivation and protection of monolayer TMDCs in functional heterostructures.
Description
Keywords
atomically thin semiconductors, device integration, exciton enhancement, passivation, 2D materials, transition metal dichalcogenides
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Source
Advanced Materials
Type
Journal article
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Restricted until
2099-12-31