Observation of long-lived interlayer excitons in monolayer MoSe2–WSe2 heterostructures

Rivera, Pasqual; Schaibley, John R.; Jones, Aaron M.; Ross, Jason; Wu, Sanfeng; Aivazian, Grant; Klement, Philip; Seyler, Kyle L.; Clark, Genevieve; Ghimire, N.; Yan, Jiaqiang; Mandrus, David; Yao, Wang; Xu, Xiaodong

doi:10.1038/ncomms7242

articleNature CommunicationsFeb 24, 2015GOLD OA

Observation of long-lived interlayer excitons in monolayer MoSe2–WSe2 heterostructures

PRPasqual Rivera JRJohn R. Schaibley AMAaron M. Jones JRJason Ross SWSanfeng Wu

University of Washington · Oak Ridge National Laboratory · +3 more institutions

PubMed

Indexed inarxivcrossrefdoajpubmed

Abstract

Van der Waals bound heterostructures constructed with two-dimensional materials, such as graphene, boron nitride and transition metal dichalcogenides, have sparked wide interest in device physics and technologies at the two-dimensional limit. One highly coveted heterostructure is that of differing monolayer transition metal dichalcogenides with type-II band alignment, with bound electrons and holes localized in individual monolayers, that is, interlayer excitons. Here, we report the observation of interlayer excitons in monolayer MoSe2–WSe2 heterostructures by photoluminescence and photoluminescence excitation spectroscopy. We find that their energy and luminescence intensity are highly tunable by an applied…

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Topics & keywords

Topics

Keywords

Exciton
Monolayer
Heterojunction
Photoluminescence
Materials science
Optoelectronics
van der Waals force
Luminescence

UN Sustainable Development Goals

Affordable and clean energy

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