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 region and high charge carrier mobilities. Furthermore, the covalent functionalization of SWCNTs with a controlled number of luminescent sp3 defects leads to even more red-shifted photoluminescence with enhanced quantum yields. Here, we demonstrate that by tailoring the binding configuration of the introduced sp3 defects and hence tuning their optical trap depth, we can generate emission from polymer-sorted (6,5) and (7,5) nanotubes that is mainly located 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 enables insights into the impact of different sp3 defects on charge transport in networks of functionalized SWCNTs.

RETRACTED: Extracellular Vesicles Embedded with Persistent Luminescence Nanoparticles Exhibiting Near-Infrared Emission for Long-Term Tracking in Primary Tumors

“…The rapid development of nanotechnology has facilitated the incorporation of synthetic polymers onto the surface of “liposomes”, which are tiny, artificial vesicles composed of lipid bilayer membranes that are capable of encapsulating extremely toxic drugs, thereby limiting the damaging effects of anticancer drugs on the normal tissues of the body . Liposomes are capable of self-assembly into various sizes and shapes in an aqueous environment.…”