Giant Exciton Transport in hBN/2D-Perovskite Heterostructures

Giant Exciton Transport in hBN/2D-Perovskite Heterostructures | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Giant Exciton Transport in hBN/2D-Perovskite Heterostructures Nahid Talebi, Sara Darbari, Paul Bittorf, Leon Multerer, Fatemeh Chahshouri, and 5 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6461797/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Two-dimensional perovskites, such as Ruddlesden-Popper perovskites, exhibit outstanding optical properties and high exciton binding energies but are highly susceptible to degradation under photo- and electron-beam exposure. To overcome this limitation, we encapsulate the perovskites with mechanically exfoliated hexagonal boron nitride flakes, forming hexagonal boron nitride/perovskite heterostructures. Cathodoluminescence spectroscopy reveals that these heterostructures exhibit significantly reduced electron-beam-induced degradation, enhanced luminescence intensity, a narrower emission bandwidth, and an extended exciton decay time. Moreover, leveraging the scanning capability of our fiber-based cathodoluminescence spectroscopy technique, we demonstrate ultra-long-range exciton transport over distances of approximately 150 micrometers, attributed to exciton-defect coupling. This exciton-defect interaction not only enhances luminescence but also highlights the potential of hexagonal boron nitride/perovskite heterostructures as hybrid van-der-Waals systems with long-range exciton transport and slow radiative decay rates, paving the way for robust and efficient optoelectronic applications. Physical sciences/Physics/Condensed-matter physics/Semiconductors/Two-dimensional materials Physical sciences/Nanoscience and technology/Nanoscale materials/Two-dimensional materials 2D perovskite cathodoluminescence hBN/RPP heterostructure exciton transport defect Full Text Additional Declarations There is NO Competing Interest. Supplementary Files SupportingInformation.pdf Supporting Information Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-6461797","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":447956200,"identity":"be202274-ff32-4e00-b203-8b0d8992a240","order_by":0,"name":"Nahid 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