Quantum dot-like excitonic behavior in individual single walled-carbon nanotubes.
Authors
Wang, X
Jia, W
Reid, BPL
Holmes, MJ
Chan, CCS
Deng, C
Nicholas, RJ
Taylor, RA
Publication Date
2016-11-16Journal Title
Sci Rep
ISSN
2045-2322
Publisher
Springer Science and Business Media LLC
Volume
6
Pages
37167-37167
Language
English
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Wang, X., Alexander-Webber, J. A., Jia, W., Reid, B., Stranks, S., Holmes, M., Chan, C., et al. (2016). Quantum dot-like excitonic behavior in individual single walled-carbon nanotubes.. Sci Rep, 6 37167-37167. https://doi.org/10.1038/srep37167
Abstract
Semiconducting single-walled carbon nanotubes are one-dimensional materials with great prospects for applications such as optoelectronic and quantum information devices. Yet, their optical performance is hindered by low fluorescent yield. Highly mobile excitons interacting with quenching sites are attributed to be one of the main non-radiative decay mechanisms that shortens the exciton lifetime. In this paper we report on time-integrated photoluminescence measurements on individual polymer wrapped semiconducting carbon nanotubes. An ultra narrow linewidth we observed demonstrates intrinsic exciton dynamics. Furthermore, we identify a state filling effect in individual carbon nanotubes at cryogenic temperatures as previously observed in quantum dots. We propose that each of the CNTs is segmented into a chain of zero-dimensional states confined by a varying local potential along the CNT, determined by local environmental factors such as the amount of polymer wrapping. Spectral diffusion is also observed, which is consistent with the tunneling of excitons between these confined states.
Embargo Lift Date
2100-01-01
Identifiers
External DOI: https://doi.org/10.1038/srep37167
This record's URL: https://www.repository.cam.ac.uk/handle/1810/266479
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