Universität zu Köln

Pfeiffer, Markus, Senkoyskiy, Boris V., Haberer, Danny, Fischer, Felix R., Yang, Fan, Meerholz, Klaus, Ando, Yoichi ORCID: 0000-0002-3553-3355, Grueneis, Alexander and Lindfors, Klas ORCID: 0000-0002-6482-5605 (2018). Observation of Room-Temperature Photoluminescence Blinking in Armchair-Edge Graphene Nanoribbons. Nano Lett., 18 (11). S. 7038 - 7045. WASHINGTON: AMER CHEMICAL SOC. ISSN 1530-6992

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Abstract

By enhancing the photoluminescence from aligned seven-atom wide armchair-edge graphene nanoribbons using plasmonic nanoantennas, we are able to observe blinking of the emission. The on-and off-times of the blinking follow power law statistics. In time-resolved spectra, we observe spectral diffusion. These findings together are a strong indication of the emission originating from a single quantum emitter. The room temperature photoluminescence displays a narrow spectral width of less than 50 meV, which is significantly smaller than the previously observed ensemble line width of 0.8 three optical transitions, which are energetically situated below the lowest bulk attribute the emission to transitions involving Tamm states localized at the end eV. From spectral excitonic state E(11)of the nanoribbon. time traces, we identify of the nanoribbons. We The photoluminescence from a single ribbon is strongly enhanced when its end is in the antenna hot spot resulting in the observed single molecule characteristics of the emission. Our findings illustrate the essential role of the end termination of graphene nanoribbons in light emission and allow us to construct a model for photoluminescence from nanoribbons.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Pfeiffer, Markus UNSPECIFIED UNSPECIFIED UNSPECIFIED Senkoyskiy, Boris V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Haberer, Danny UNSPECIFIED UNSPECIFIED UNSPECIFIED Fischer, Felix R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Yang, Fan UNSPECIFIED UNSPECIFIED UNSPECIFIED Meerholz, Klaus UNSPECIFIED UNSPECIFIED UNSPECIFIED Ando, Yoichi UNSPECIFIED orcid.org/0000-0002-3553-3355 UNSPECIFIED Grueneis, Alexander UNSPECIFIED UNSPECIFIED UNSPECIFIED Lindfors, Klas UNSPECIFIED orcid.org/0000-0002-6482-5605 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-167234
DOI:	10.1021/acs.nanolett.8b03006
Journal or Publication Title:	Nano Lett.
Volume:	18
Number:	11
Page Range:	S. 7038 - 7045
Date:	2018
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	1530-6992
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Physical Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SINGLE-MOLECULE FLUORESCENCE; ON-SURFACE SYNTHESIS; QUANTUM DOTS; BAND-GAP; EMISSION; STATE Multiple languages Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/16723