Universität zu Köln

Senkovskiy, B.V., Pfeiffer, M., Alavi, S.K., Bliesener, A., Zhu, J., Michel, S., Fedorov, A. V., German, R., Hertel, D., Haberer, D., Petaccia, L., Fischer, F.R., Meerholz, K., van Loosdrecht, P.H.M., Lindfors, K. and Grüneis, A. (2017). Making graphene nanoribbons photoluminescent. Nano letters, 17 (7). pp. 4029-4037. ACS Publications. ISSN 1530-6992

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Abstract

We demonstrate the alignment-preserving transfer of parallel graphene nanoribbons (GNRs) onto insulating substrates. The photophysics of such samples is characterized by polarized Raman and photoluminescence (PL) spectroscopies. The Raman scattered light and the PL are polarized along the GNR axis. The Raman cross section as a function of excitation energy has distinct excitonic peaks associated with transitions between the one-dimensional parabolic subbands. We find that the PL of GNRs is intrinsically low but can be strongly enhanced by blue laser irradiation in ambient conditions or hydrogenation in ultrahigh vacuum. These functionalization routes cause the formation of sp3 defects in GNRs. We demonstrate the laser writing of luminescent patterns in GNR films for maskless lithography by the controlled generation of defects. Our findings set the stage for further exploration of the optical properties of GNRs on insulating substrates and in device geometries.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Senkovskiy, B.V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pfeiffer, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Alavi, S.K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bliesener, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Zhu, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Michel, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fedorov, A. V. UNSPECIFIED UNSPECIFIED UNSPECIFIED German, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hertel, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Haberer, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Petaccia, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fischer, F.R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Meerholz, K. UNSPECIFIED UNSPECIFIED UNSPECIFIED van Loosdrecht, P.H.M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lindfors, K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Grüneis, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-81541
DOI:	10.1021/acs.nanolett.7b00147
Journal or Publication Title:	Nano letters
Volume:	17
Number:	7
Page Range:	pp. 4029-4037
Date:	30 March 2017
Publisher:	ACS Publications
ISSN:	1530-6992
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics II
Subjects:	Natural sciences and mathematics Physics
Funders:	ERC grant no. 648589 ’SUPER-2D’, DFG projects CRC 1238, GR 3708/2-1, Award no. DESC0010409 (design, synthesis and characterization of molecular building blocks), e Center for Energy Efficient Electronics Science NSF Award 0939514 (SPM imaging and spectroscopy), European Community’s Seventh Framework Programme (FP7/2007-2013) under grant agreement n.312284 (CALIPSO)
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/8154