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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. Here, 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]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States). Chemistry & Nanoscience Center
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States). Materials Science Center
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); USDOE Office of Science (SC), Workforce Development for Teachers and Scientists (WDTS) (SC-27)
OSTI Identifier:
1572271
Alternate Identifier(s):
OSTI ID: 1572420
Report Number(s):
NREL/JA-5900-74334
Journal ID: ISSN 2040-3364; NANOHL
Grant/Contract Number:  
AC36-08GO28308
Resource Type:
Accepted Manuscript
Journal Name:
Nanoscale
Additional Journal Information:
Journal Volume: 11; Journal Issue: 44; Journal ID: ISSN 2040-3364
Publisher:
Royal Society of Chemistry
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-Kern, Dana B., Hart, Stephanie M., Kang, Hyun Suk, Hao, Ji, Ihly, Rachelle, 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:10.1039/C9NR07821E.
Arias, Dylan H., Sulas-Kern, Dana B., Hart, Stephanie M., Kang, Hyun Suk, Hao, Ji, Ihly, Rachelle, 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:10.1039/C9NR07821E.
Arias, Dylan H., Sulas-Kern, Dana B., Hart, Stephanie M., Kang, Hyun Suk, Hao, Ji, Ihly, Rachelle, 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: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-Kern, Dana B. and Hart, Stephanie M. and Kang, Hyun Suk and Hao, Ji and Ihly, Rachelle 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. Here, 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 = {10.1039/C9NR07821E},
journal = {Nanoscale},
number = 44,
volume = 11,
place = {United States},
year = {2019},
month = {10}
}

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