materialscloud:2020.0040/v1
Published April 26, 2020 | Version v1
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Bright Electroluminescence from Single Graphene Nanoribbon Junctions

Creators

  • 1. S3 Center, Istituto Nanoscienze, Consiglio Nazionale delle Ricerche, via Campi 213/A, 41125, Modena, Italy
  • 2. Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, UMR 7504, F-67000 Strasbourg, France

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Description

This record refers to a study on the electroluminescence of individual GNRs suspended between the tip of a scanning tunneling microscope (STM) and a Au(111) substrate. Emission spectra of such GNR junctions reveal a bright and narrow band emission of red light, whose energy can be tuned with the bias voltage applied to the junction, but always lying below the gap of infinite GNRs. Comparison with ab initio calculations indicates that the emission involves electronic states localized at the GNR termini. The results shed light on unpredicted optical transitions in GNRs. The record includes the computational data that allows to reproduce the published results.

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References

Journal reference (Paper in which on the electroluminescence of individual GNRs suspended between the tip of a scanning tunneling microscope (STM) and a Au(111) substrate is reported. Comparison with ab initio calculations shed light on unpredicted optical transitions in GNRs . The calculations of the optical spectra are done within Many Body perturbation Teory, using the Bethe-Salpeter Equation. The electronic properties are computed within Density Functional Theory, and the quasiparticle energies computed within the G0W0 approximation.)
M. C. Chong, N. Afshar-Imani, F. Scheurer, C. Cardoso, A. Ferretti, D. Prezzi, G. Schull, Nano Lett. 181175-181 (2018), doi: 10.1021/acs.nanolett.7b03797