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Scalable Electronic Ratchet with Over 10% Rectification Efficiency
Linköpings universitet, Institutionen för fysik, kemi och biologi, Komplexa material och system. Linköpings universitet, Tekniska fakulteten.
Holst Ctr TNO, Netherlands.
Holst Ctr TNO, Netherlands; Eindhoven Univ Technol, Netherlands.
Linköpings universitet, Institutionen för fysik, kemi och biologi, Biomolekylär och Organisk Elektronik. Linköpings universitet, Tekniska fakulteten.ORCID-id: 0000-0002-7104-7127
2020 (engelsk)Inngår i: ADVANCED SCIENCE, ISSN 2198-3844, artikkel-id 1902428Artikkel i tidsskrift (Fagfellevurdert) Epub ahead of print
Abstract [en]

Electronic ratchets use a periodic potential with broken inversion symmetry to rectify undirected (electromagnetic, EM) forces and can in principle be a complement to conventional diode-based designs. Unfortunately, ratchet devices reported to date have low or undetermined power conversion efficiencies, hampering applicability. Combining experiments and numerical modeling, field-effect transistor-based ratchets are investigated in which the driving signal is coupled into the accumulation layer via interdigitated finger electrodes that are capacitively coupled to the field effect transistor channel region. The output current-voltage curves of these ratchets can have a fill factor amp;gt;amp;gt; 0.25 which is highly favorable for the power output. Experimentally, a maximum power conversion efficiency well over 10% at 5 MHz, which is the highest reported value for an electronic ratchet, is determined. Device simulations indicate this number can be increased further by increasing the device asymmetry. A scaling analysis shows that the frequency range of optimal performance can be scaled to the THz regime, and possibly beyond, while adhering to technologically realistic parameters. Concomitantly, the power output density increases from approximate to 4 W m(-2) to approximate to 1 MW m(-2). Hence, this type of ratchet device can rectify high-frequency EM fields at reasonable efficiencies, potentially paving the way for actual use as energy harvester.

sted, utgiver, år, opplag, sider
Wiley-VCH Verlagsgesellschaft, 2020. artikkel-id 1902428
Emneord [en]
field effect transistors; indium-gallium-zinc oxide (IGZO); modeling; ratchets; rectification
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Identifikatorer
URN: urn:nbn:se:liu:diva-162941DOI: 10.1002/advs.201902428ISI: 000502334500001Scopus ID: 2-s2.0-85076346103OAI: oai:DiVA.org:liu-162941DiVA, id: diva2:1382364
Merknad

Funding Agencies|Knut and Alice Wallenberg Foundation, project "Tail of the Sun"

Tilgjengelig fra: 2020-01-02 Laget: 2020-01-02 Sist oppdatert: 2020-01-22bibliografisk kontrollert

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Totalt: 68 treff
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