Universität zu Köln

Alavi, Seyed Khalil, Senkovskiy, Boris, V, Hertel, Dirk, Haberer, Danny, Ando, Yoichi ORCID: 0000-0002-3553-3355, Meerholz, Klaus, Fischer, Felix R., Grueneis, Alexander and Lindfors, Klas ORCID: 0000-0002-6482-5605 (2020). Photodetection Using Atomically Precise Graphene Nanoribbons. ACS Appl. Nano Mater., 3 (8). S. 8343 - 8352. WASHINGTON: AMER CHEMICAL SOC. ISSN 2574-0970

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Abstract

In the search for high-sensitivity, low-noise, and high-bandwidth photodetectors, materials are a key ingredient. One- and two-dimensional materials are of particular interest in this area due to their extraordinary properties such as ballistic transport. Here, we demonstrate nanoscale photoconductive photodetectors using aligned atomically precise seven-atom wide armchair-edge graphene nanoribbons. The detector responsivity is 0.035 mAW(-1) at a bias voltage of 2 V. The dark current is below 30 pA for a bias voltage of 1.5 V, which is orders of magnitude lower than that of typical graphene photodetectors. The possibility to align the nanoribbons and to tune their optical and electronic properties by choice of ribbon width and edge structure enables nanoscale polarization-resolving photodetectors optimized for specific spectral ranges. Graphene nanoribbons with identical electronic and optical properties can be prepared on a large scale using bottom-up synthesis, making them a highly interesting material for electronics and optoelectronics.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Alavi, Seyed Khalil UNSPECIFIED UNSPECIFIED UNSPECIFIED Senkovskiy, Boris, V UNSPECIFIED UNSPECIFIED UNSPECIFIED Hertel, Dirk UNSPECIFIED UNSPECIFIED UNSPECIFIED Haberer, Danny UNSPECIFIED UNSPECIFIED UNSPECIFIED Ando, Yoichi UNSPECIFIED orcid.org/0000-0002-3553-3355 UNSPECIFIED Meerholz, Klaus UNSPECIFIED UNSPECIFIED UNSPECIFIED Fischer, Felix R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Grueneis, Alexander UNSPECIFIED UNSPECIFIED UNSPECIFIED Lindfors, Klas UNSPECIFIED orcid.org/0000-0002-6482-5605 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-322418
DOI:	10.1021/acsanm.0c01549
Journal or Publication Title:	ACS Appl. Nano Mater.
Volume:	3
Number:	8
Page Range:	S. 8343 - 8352
Date:	2020
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	2574-0970
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 CARBON; PHOTOCONDUCTIVITY; PHOTORESPONSE; FABRICATION; SPEED Multiple languages Nanoscience & Nanotechnology; Materials Science, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/32241