Skibinsky-Gitlin, ES, Rodriguez-Bolivar, S, Califano, M orcid.org/0000-0003-3199-3896 et al. (1 more author) (2020) Optical properties of nanocrystal films: blue shifted transitions as signature of strong coupling. Nanoscale Advances, 2 (1). pp. 384-393. ISSN 2516-0230
Abstract
We present a theoretical study at the atomistic level of the optical properties of semiconductor nanocrystal films. We investigate the dependence of the absorption coefficient on size, inter-dot separation, surface stoichiometry and morphology, temperature, position of the Fermi level and light polarization. Our results show that, counter-intuitively, huge blue shifts are expected in some intra-band transitions for strongly coupled arrays, in contrast with the predicted and observed red shift of the band gap absorption in such systems. Furthermore, we find that the energies of such transitions can be tuned within a range of several hundreds of meV, just by engineering the inter-dot separation in the film through the choice of appropriately sized capping ligands. Finally we discuss the application of this effect to nanocrystal-based intermediate-band solar cells.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © The Royal Society of Chemistry 2019. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. To view a copy of this license, visit https://creativecommons.org/licenses/by/3.0/. |
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 11:15 |
Last Modified: | 10 Nov 2021 16:26 |
Status: | Published |
Publisher: | Royal Society of Chemistry |
Identification Number: | 10.1039/C9NA00647H |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:154847 |
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