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Title: Effect of Nanotube Coupling on Exciton Transport in Polymer-Free Monochiral Semiconducting Carbon Nanotube Networks

Abstract

Semiconducting single-walled carbon nanotubes (s-SWCNTs) are attractive light-harvesting components for solar photoconversion schemes and architectures, and selective polymer extraction has emerged as a powerful route to obtain highly pure s-SWCNT samples for electronic applications. Here we demonstrate a novel method for producing electronically coupled thin films of near-monochiral s-SWCNTs without wrapping polymer. Detailed steady-state and transient optical studies on such samples provide new insights into the role of the wrapping polymer on controlling intra-bundle nanotube-nanotube interactions and exciton energy transfer within and between bundles. Complete removal of polymer from the networks results in rapid exciton trapping within nanotube bundles, limiting long-range exciton transport. The results suggest that intertube electronic coupling and associated exciton delocalization across multiple tubes can limit diffusive exciton transport. The complex relationship observed here between exciton delocalization, trapping, and long-range transport, helps to inform the design, preparation, and implementation of carbon nanotube networks as active elements for optical and electronic applications.

Authors:
ORCiD logo [1];  [1]; ORCiD logo [1];  [1];  [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1572271
Report Number(s):
NREL/JA-5900-74334
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Journal Article
Journal Name:
Nanoscale
Additional Journal Information:
Journal Name: Nanoscale
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; carbon nanotubes; exciton transport; organic semiconductors; energy migration

Citation Formats

Arias, Dylan H, Sulas, Dana, Hart, Stephanie M, Kang, Hyun Suk, Hao, Ji, Ihly, Rachelle R, Johnson, Justin C, Blackburn, Jeffrey L, and Ferguson, Andrew J. Effect of Nanotube Coupling on Exciton Transport in Polymer-Free Monochiral Semiconducting Carbon Nanotube Networks. United States: N. p., 2019. Web. doi:https://dx.doi.org/10.1039/C9NR07821E.
Arias, Dylan H, Sulas, Dana, Hart, Stephanie M, Kang, Hyun Suk, Hao, Ji, Ihly, Rachelle R, Johnson, Justin C, Blackburn, Jeffrey L, & Ferguson, Andrew J. Effect of Nanotube Coupling on Exciton Transport in Polymer-Free Monochiral Semiconducting Carbon Nanotube Networks. United States. doi:https://dx.doi.org/10.1039/C9NR07821E.
Arias, Dylan H, Sulas, Dana, Hart, Stephanie M, Kang, Hyun Suk, Hao, Ji, Ihly, Rachelle R, Johnson, Justin C, Blackburn, Jeffrey L, and Ferguson, Andrew J. Tue . "Effect of Nanotube Coupling on Exciton Transport in Polymer-Free Monochiral Semiconducting Carbon Nanotube Networks". United States. doi:https://dx.doi.org/10.1039/C9NR07821E.
@article{osti_1572271,
title = {Effect of Nanotube Coupling on Exciton Transport in Polymer-Free Monochiral Semiconducting Carbon Nanotube Networks},
author = {Arias, Dylan H and Sulas, Dana and Hart, Stephanie M and Kang, Hyun Suk and Hao, Ji and Ihly, Rachelle R and Johnson, Justin C and Blackburn, Jeffrey L and Ferguson, Andrew J},
abstractNote = {Semiconducting single-walled carbon nanotubes (s-SWCNTs) are attractive light-harvesting components for solar photoconversion schemes and architectures, and selective polymer extraction has emerged as a powerful route to obtain highly pure s-SWCNT samples for electronic applications. Here we demonstrate a novel method for producing electronically coupled thin films of near-monochiral s-SWCNTs without wrapping polymer. Detailed steady-state and transient optical studies on such samples provide new insights into the role of the wrapping polymer on controlling intra-bundle nanotube-nanotube interactions and exciton energy transfer within and between bundles. Complete removal of polymer from the networks results in rapid exciton trapping within nanotube bundles, limiting long-range exciton transport. The results suggest that intertube electronic coupling and associated exciton delocalization across multiple tubes can limit diffusive exciton transport. The complex relationship observed here between exciton delocalization, trapping, and long-range transport, helps to inform the design, preparation, and implementation of carbon nanotube networks as active elements for optical and electronic applications.},
doi = {https://dx.doi.org/10.1039/C9NR07821E},
journal = {Nanoscale},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {10}
}

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