Tuning counterion chemistry to reduce carrier localization in doped semiconducting carbon nanotube networks

Murrey, Tucker L.; Aubry, Taylor J.; Ruiz, Omar Leon; Thurman, Kira A.; Eckstein, Klaus H.; Doud, Evan A.; Stauber, Julia M.; Spokoyny, Alexander M.; Schwartz, Benjamin J.; Hertel, Tobias; Blackburn, Jeffrey L.; Ferguson, Andrew J.

doi:10.1016/j.xcrp.2023.101407

Title: Tuning counterion chemistry to reduce carrier localization in doped semiconducting carbon nanotube networks

Journal Article · 05 May 2023 · Cell Reports Physical Science

DOI: https://doi.org/10.1016/j.xcrp.2023.101407 · OSTI ID:1975551

Murrey, Tucker L. ^[1];

^[2]; Ruiz, Omar Leon ^[3]; Thurman, Kira A. ^[2]; Eckstein, Klaus H. ^[4]; Doud, Evan A. ^[3]; Stauber, Julia M. ^[3]; Spokoyny, Alexander M. ^[3]; Schwartz, Benjamin J. ^[3]; Hertel, Tobias ^[4];

^[2];

^[2]

Univ. of California, Davis, CA (United States); National Renewable Energy Laboratory (NREL), Golden, CO (United States)
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Univ. of California, Los Angeles, CA (United States)
Julius Maximilian University of Würzburg (Germany)

Understanding and controlling the impact that electrostatic interactions have on the transport of injected charge carriers is important for the utilization of pi-conjugated semiconductors in opto-electronic applications. Here, we explore the impact of dopant chemical and electronic structure on the doping efficacy and charge carrier transport in semiconducting single-walled carbon nanotube (s-SWCNT) networks using molecular charge-transfer dopants based on functionalized icosahedral dodecaborane (DDB) clusters. Calculations indicate that localization of electron density on the DDB core reduces the coulombic interactions that contribute to hole localization in the s-SWCNTs, thereby improving charge carrier transport. The enhanced delocalization produces an increase in the electrical conductivity and thermopower at lower charge carrier densities, yielding enhanced thermoelectric transport and a thermoelectric power factor that surpasses the previous best in class for enriched s-SWCNT thin-film networks. This strategy can be applied broadly across pi-conjugated semiconductors to tune and enhance performance in a variety of energy harvesting devices.

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Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Synthetic Control Across Length-scales for Advancing Rechargeables (SCALAR)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB); National Science Foundation (NSF); German Research Foundation (DFG)

Grant/Contract Number:: AC36-08GO28308; SC0019381; DMR-2105896; HE3355/4-1

OSTI ID:: 1975551

Report Number(s):: NREL/JA-5900-84677; MainId:85450; UUID:d2061745-ce56-4e07-a8b5-a1648ef13ee3; MainAdminID:69618; TRN: US2314066

Journal Information:: Cell Reports Physical Science, Vol. 4, Issue 5; ISSN 2666-3864

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
carbon nanotube
carrier doping
carrier transport
doping chemistry
solar-photochemistry
thermoelectrics
charge transfer
delocalization
dodecaborane

Title: Tuning counterion chemistry to reduce carrier localization in doped semiconducting carbon nanotube networks

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