Califano, M orcid.org/0000-0003-3199-3896 (2020) Charge Dynamics in Quantum-Dot–Acceptor Complexes in the Presence of Confining and Deconfining Ligands. Journal of Physical Chemistry Letters, 11 (1). pp. 280-285. ISSN 1948-7185
Abstract
Nanocrystal surface functionalization is becoming widespread for applications exploiting fast charge extraction or ultrasensitive redox reactions. A variety of molecular acceptors are being linked to the dot surface via a new generation of organic ligands, ranging from neutral linkers to charge delocalizers. Understanding how core states interact with these molecular orbitals, localized outside the dot, is paramount for optimizing the design of efficient nanocrystal–acceptor conjugates. Here we look at two examples of this interaction: charge transfer to a molecular acceptor linked through either an exciton-delocalizing ligand or a more conventional localizing molecule. We find that such transfer can be described in terms of an Auger-mediated process whose rates can be tuned within a window of a few orders of magnitude (for the same dot–ligand–acceptor conjugate) by a suitable choice of the dispersion solvent and nanocrystal’s dielectric environment. This result provides clear guidelines for charge extraction rate engineering in nanocrystal-based devices.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 American Chemical Society. This is an author produced version of a paper published in Journal of Physical Chemistry Letters. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Pollard Institute (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 23 Dec 2019 11:00 |
Last Modified: | 15 Dec 2020 01:38 |
Status: | Published |
Publisher: | American Chemical Society |
Identification Number: | 10.1021/acs.jpclett.9b03073 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:154846 |