NDLI: Disorder limited exciton transport in colloidal single-wall carbon nanotubes.

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Disorder limited exciton transport in colloidal single-wall carbon nanotubes.

Content Provider	Semantic Scholar
Author	Crochet, Jared J. Duque, Juan G. Werner, James H. Lounis, Brahim Cognet, Laurent Doorn, Stephen K.
Copyright Year	2012
Abstract	We present measurements of S(1) exciton transport in (6,5) carbon nanotubes at room temperature in a colloidal environment. Exciton diffusion lengths associated with end quenching paired with photoluminescence lifetimes provide a direct basis for determining a median diffusion constant of approximately 7.5 cm(2)s(-1). Our experimental results are compared to model diffusion constants calculated using a realistic exciton dispersion accounting for a logarithmic correction due to the exchange self-energy and a nonequilibrium distribution between bright and dark excitons. The intrinsic diffusion constant associated with acoustic phonon scattering is too large to explain the observed diffusion length, and as such, we attribute the observed transport to disorder-limited diffusional transport associated with the dynamics of the colloidal interface. In this model an effective surface potential limits the exciton mean free path to the same size as that of the exciton wave function, defined by the strength of the electron-hole Coulomb interaction.
File Format	PDF HTM / HTML
DOI	10.1021/nl301739d
PubMed reference number	22985181
Journal	Medline
Volume Number	12
Issue Number	10
Alternate Webpage(s)	https://hal.archives-ouvertes.fr/hal-00735016/document
Alternate Webpage(s)	https://www.cognet-research.com/uploads/8/8/0/3/88031742/2012_nanoletters_crochet.pdf
Alternate Webpage(s)	https://doi.org/10.1021/nl301739d
Journal	Nano letters
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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