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Issue 7, 2019
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A tool box to ascertain the nature of doping and photoresponse in single-walled carbon nanotubes

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Abstract

The effect of doping on the electronic properties in bulk single-walled carbon nanotube (SWCNT) samples is studied for the first time using a new in situ Raman spectroelectrochemical method, and further verified by DFT calculations and photoresponse. We use p-/n-doped SWCNTs prepared by diazonium reactions as a versatile chemical strategy to control the SWCNT behavior. The measured and calculated data testify an acceptor effect of 4-aminobenzenesulfonic acid (p-doping), and a donor effect (n-doping) in the case of benzyl alcohol. In addition, pristine and covalently functionalized SWCNTs were used for the preparation of photoactive film electrodes. The photocathodic current in the photoelectrochemical cell is consistently modulated by the doping group. These results validate the in situ Raman spectroelectrochemistry as a unique tool box for predicting the electronic properties of functionalized SWCNTs in the form of thin films and their operational functionality in thin film devices for future optoelectronic applications.

Graphical abstract: A tool box to ascertain the nature of doping and photoresponse in single-walled carbon nanotubes

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Supplementary files

Article information


Submitted
09 Nov 2018
Accepted
22 Jan 2019
First published
23 Jan 2019

This article is Open Access

Phys. Chem. Chem. Phys., 2019,21, 4063-4071
Article type
Paper

A tool box to ascertain the nature of doping and photoresponse in single-walled carbon nanotubes

A. Santidrián, J. M. González-Domínguez, V. Diez-Cabanes, J. Hernández-Ferrer, W. K. Maser, A. M. Benito, A. Anśon-Casaos, J. Cornil, T. Da Ros and M. Kalbáč, Phys. Chem. Chem. Phys., 2019, 21, 4063
DOI: 10.1039/C8CP06961A

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