Trion Electroluminescence from Semiconducting Carbon Nanotubes

Journal article


Publication Details

Author(s): Jakubka F, Grimm S, Zakharko Y, Gannott F, Zaumseil J
Journal: ACS nano
Publication year: 2014
Volume: 8
Journal issue: 8
Pages range: 8477-8486
ISSN: 1936-0851
eISSN: 1936-086X


Abstract

Near-infrared emission from semiconducting single-walled carbon nanotubes (SWNTs) usually results from radiative relaxation of excitons. By binding an additional electron or hole through chemical or electrochemical doping, charged three-body excitons, so-called trions, are created that emit light at lower energies. The energy difference is large enough to observe weak trion photoluminescence from doped SWNTs even at room temperature. Here, we demonstrate strong trion electroluminescence from electrolyte-gated, light-emitting SWNT transistors with three different polymer-sorted carbon nanotube species, namely, (6,5), (7,5) and (10,5). The red-shifted trion emission is equal to or even stronger than the exciton emission, which is attributed to the high charge carrier density in the transistor channel. The possibility of trions as a radiative relaxation pathway for triplets and dark excitons that are formed in large numbers by electron-hole recombination is discussed. The ratio of trion to exciton emission can be tuned by the applied voltages, enabling voltage-controlled near-infrared light sources with narrow line widths that are solution-processable and operate at low voltages (<3 V).


FAU Authors / FAU Editors

Gannott, Florentina Dr.-Ing.
Jakubka, Florian
Lehrstuhl für Werkstoffwissenschaften (Polymerwerkstoffe)
Grimm, Stefan
Lehrstuhl für Werkstoffwissenschaften (Polymerwerkstoffe)
Professur für Nano-Elektronik
Zakharko, Yuriy Dr.
Professur für Nano-Elektronik
Zaumseil, Jana Prof.
Professur für Nano-Elektronik


Additional Organisation
Exzellenz-Cluster Engineering of Advanced Materials


How to cite

APA:
Jakubka, F., Grimm, S., Zakharko, Y., Gannott, F., & Zaumseil, J. (2014). Trion Electroluminescence from Semiconducting Carbon Nanotubes. ACS nano, 8(8), 8477-8486. https://dx.doi.org/10.1021/nn503046y

MLA:
Jakubka, Florian, et al. "Trion Electroluminescence from Semiconducting Carbon Nanotubes." ACS nano 8.8 (2014): 8477-8486.

BibTeX: 

Last updated on 2019-16-03 at 14:08