Help Privacy Policy Disclaimer
  Advanced SearchBrowse




Journal Article

Understanding Charge Transport in Mixed Networks of Semiconducting Carbon Nanotubes


Gannott,  Florentina
Sandoghdar Division, Max Planck Institute for the Science of Light, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available

Rother, M., Schiessi, S. P., Zakharko, Y., Gannott, F., & Zaumseil, J. (2016). Understanding Charge Transport in Mixed Networks of Semiconducting Carbon Nanotubes. ACS APPLIED MATERIALS & INTERFACES, 8(8), 5571-5579. doi:10.1021/acsami.6b00074.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-62FB-5
The ability to select and enrich semiconducting single-walled carbon nanotubes (SWNT) with high purity has led to a fast rise of solution-processed nanotube network field-effect transistors (FETs) with high carrier mobilities and on/off current ratios. However, it remains an open question whether it is best to use a network of only one nanotube species (monochiral) or whether a mix of purely semiconducting nanotubes but with different bandgaps is sufficient for high performance FETs. For a range of different polymer-sorted semiconducting SWNT networks, we demonstrate that a very small amount of narrow bandgap nanotubes within a dense network of large bandgap nanotubes can dominate the transport and thus severely limit on-currents and effective carrier mobility. Using, gate-voltage dependent electroluminescence, we spatially and spectrally reveal preferential charge transport:that toes not depend on nominal network density but on the energy level distribution within the network and carrier density. On the basis of these results, we outline rational guidelines for the use of mixed SWNT networks to obtain high performance FETs while reducing the cost for purification.