Tuning Electroluminescence from Functionalized SWCNT Networks further into the Near-Infrared

Abstract

Near-infrared electroluminescence from carbon-based emitters, especially in the second biological window (NIR-II) or at telecommunication wavelengths, is difficult to achieve. Single-walled carbon nanotubes (SWCNTs) have been proposed as a possible solution due to their tunable and narrowband emission in the near-infrared and high charge carrier mobilities. Furthermore, the covalent functionalization of SWCNTs with a controlled number of luminescent sp${}^3$ defects leads to even more red-shifted photoluminescence with enhanced quantum yields. Here, we demonstrate that by tailoring the binding configuration of the introduced sp${}^3$ defects and hence tuning their optical trap depth we can generate emission from polymer-sorted (6,5) and (7,5) nanotubes that is mainly occurring in the telecommunication O-band (1260-1360 nm). Networks of these functionalized nanotubes are integrated in ambipolar, light-emitting field-effect transistors to yield the corresponding narrowband near-infrared electroluminescence. Further investigation of the current and carrier density-dependent electro- and photoluminescence spectra enable insights into the impact of different sp${}^3$ defects on charge transport in networks of functionalized SWCNTs.

References in corpus (5)

• Luminescent Defects in Single-Walled Carbon Nanotubes for Applications
• Absolute Quantification of sp${}^3$ Defects in Semiconducting Single-Wall Carbon Nanotubes by Raman Spectroscopy
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• Probing Carrier Dynamics in sp${}^3$-Functionalized Single-Walled Carbon Nanotubes with Time-Resolved Terahertz Spectroscopy
• Near-Intrinsic Photo- and Electroluminescence from Single-Walled Carbon Nanotube Thin Films on BCB-Passivated Surfaces

Cited by in corpus (1)

• How to Recognize Clustering of Luminescent Defects in Single-Wall Carbon Nanotubes