Photodetection Using Atomically Precise Graphene Nanoribbons
Source abstract
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.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Graphene research and applications · 2D Materials and Applications · Nanowire Synthesis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department für Chemie, Universität zu Köln, Luxemburger Strasse 116, Köln 50939, Germany
Institut für Angewandte Physik der Universität Bonn, Wegeler Strasse 8, Bonn 53115, Germany
II. Physikalisches Institut, Universität zu Köln, Zülpicher Strasse 77, 50937 Köln, Germany
Department of Chemistry, University of California at Berkeley, Tan Hall, Berkeley, California 94720, United States
Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
Kavli Energy NanoSciences Institute at the University of California Berkeley and the Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
Funding
Deutscher Akademischer Austauschdienst · Basic Energy Sciences · Deutsche Forschungsgemeinschaft · H2020 European Research Council · Volkswagen Foundation
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