Prodanović, N, Vukmirović, N, Ikonić, Z et al. (2 more authors) (2014) Importance of polaronic effects for charge transport in CdSe quantum dot solids. Journal of Physical Chemistry Letters, 5 (8). pp. 1335-1340. ISSN 1948-7185
Abstract
We developed an accurate model accounting for electron-phonon interaction in colloidal quantum dot supercrystals that allowed us to identify the nature of charge carriers and the electrical transport regime. We find that in experimentally analyzed CdSe nanocrystal solids, the electron-phonon interaction is sufficiently strong that small polarons localized to single dots are formed. Charge-carrier transport occurs by small polaron hopping between the dots, with mobility that decreases with increasing temperature. While such a temperature dependence of mobility is usually considered as a proof of band transport, we show that the same type of dependence occurs in the system where transport is dominated by small polaron hopping.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2014 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Physical Chemistry Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/jz500086c |
Keywords: | band transport; electron-phonon interaction; hopping; mobility; nanocrystal solids; small polarons |
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: | 06 May 2015 11:23 |
Last Modified: | 27 Feb 2019 15:49 |
Published Version: | http://dx.doi.org/10.1021/jz500086c |
Status: | Published |
Publisher: | American Chemical Society |
Identification Number: | 10.1021/jz500086c |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:82905 |