Manifestation of chirality induced spin selectivity in chiral-photodiodes based on donor-acceptor copolymer/chiral molecule/fullerene blends

Manifestation of chirality induced spin selectivity in chiral-photodiodes based on donor-acceptor copolymer/chiral molecule/fullerene blends | 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 Manifestation of chirality induced spin selectivity in chiral-photodiodes based on donor-acceptor copolymer/chiral molecule/fullerene blends Zeev Vardeny, Xin Pan, Paul Bailey, Heshan Walpitage, Daniel Nikiforov, and 2 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-5291127/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 We studied two enantiomers of chiral blends consisting of fullerenes (PC 71 BM), chiral molecules (aza[6]H) and π-conjugated donor-acceptor copolymers (F8BT), which exhibit significant circular dichroism (CD). These were examined using optical and optoelectronic methods in films and chiral photodiodes, where the chiral blend serves as the active layer. These techniques include chiroptical response, steady state photocurrent (PC) spectroscopy and time-of-flight transient PC. We found that the PC in the chiral photodiode is sensitive to the impinging light helicity and the chiral blend handedness, showing large dissymmetry with g PC -factor ~ 20%. We show that the PC dissymmetry is caused by the chirality induced spin selectivity (CISS) in the active layer, where it serves as spin filter in the processes of the charge-transfer exciton dissociation into electron-hole pairs and their subsequent recombination across the polymer/fullerene interface, rather than the circularly polarized light absorption in the device, or the spin aligned carrier mobility. In particular, we demonstrate that the device PC dissymmetry spectrum does not follow the circular dichroism spectrum of the chiral blend, and the steady state electron and hole mobilities are not affected by their spin alignment. The CISS process is best manifested in the measured dissymmetry of the photocarriers lifetime dissymmetry under circular polarized light. Physical sciences/Physics/Electronics, photonics and device physics/Electronic and spintronic devices Physical sciences/Physics/Condensed-matter physics/Spintronics Full Text Additional Declarations There is NO Competing Interest. Supplementary Files XinAzaS.I.final.1018.docx 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. 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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-5291127","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":373715314,"identity":"5572e9b3-a474-4708-a57b-b7ef37a502f3","order_by":0,"name":"Zeev 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