A1 Refereed original research article in a scientific journal

Near-Intrinsic Photo- and Electroluminescence from Single-Walled Carbon Nanotube Thin Films on BCB-Passivated Surfaces




AuthorsZorn NF, Settele S, Zhao S, Lindenthal S, El Yumin AA, Wedl T, Li H, Flavel BS, Hogele A, Zaumseil J

PublisherWILEY-V C H VERLAG GMBH

Publication year2023

JournalAdvanced Optical Materials

Journal name in sourceADVANCED OPTICAL MATERIALS

Journal acronymADV OPT MATER

Article number2300236

Volume11

Issue14

Number of pages11

ISSN2195-1071

DOIhttps://doi.org/10.1002/adom.202300236(external)


Abstract
Their outstanding electrical and optical properties make semiconducting single-walled carbon nanotubes (SWCNTs) highly suitable for charge transport and emissive layers in near-infrared optoelectronic devices. However, the luminescence spectra of SWCNT thin films on commonly used glass and Si/SiO2 substrates are often compromised by broadening of the main excitonic emission and unwanted low-energy sidebands. Surface passivation with a commercially available, low dielectric constant, cross-linked bis-benzocyclobutene-based polymer (BCB) enhances the emission properties of SWCNTs to the same level as hexagonal boron nitride (h-BN) flakes do. The presence of BCB suppresses sideband emission, especially from the Y-1 band, which is attributed to defects introduced by the interaction of the nanotube lattice with oxygen-containing terminal groups of the substrate surface. The facile and reproducible deposition of homogeneous BCB films over large areas combined with their resistance against common solvents and chemicals employed during photolithography make them compatible with standard semiconductor device fabrication. Utilizing this approach, light-emitting (6,5) SWCNT network field-effect transistors are fabricated on BCB-treated glass substrates with excellent electrical characteristics and near-intrinsic electroluminescence. Hence, passivation with BCB is proposed as a standard treatment for substrates used for spectroscopic investigations of and optoelectronic devices with SWCNTs and other low-dimensional emitters.



Last updated on 2024-26-11 at 22:05