Tuning Counterion Chemistry to Reduce Carrier Localization in Doped Semiconducting Carbon Nanotube Networks: Article No. 101407

Tucker Murrey, Taylor Aubry, Omar Ruiz, Kira Thurman, Klaus Eckstein, Evan Doud, Julia Stauber, Alexander Spokoyny, Benjamin Schwartz, Tobias Hertel, Jeffrey Blackburn, Andrew Ferguson

Research output: Contribution to journalArticlepeer-review

7 Scopus Citations

Abstract

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.
Original languageAmerican English
Number of pages17
JournalCell Reports Physical Science
Volume4
Issue number5
DOIs
StatePublished - 2023

NREL Publication Number

  • NREL/JA-5900-84677

Keywords

  • carbon nanotube
  • carrier doping
  • carrier transport
  • doping chemistry
  • solar-photochemistry
  • thermoelectrics

Fingerprint

Dive into the research topics of 'Tuning Counterion Chemistry to Reduce Carrier Localization in Doped Semiconducting Carbon Nanotube Networks: Article No. 101407'. Together they form a unique fingerprint.

Cite this