Publication:
A new RIS architecture with a single power amplifier: energy efficiency and error performance analysis

dc.contributor.coauthorAlexandropoulos, George C.
dc.contributor.departmentDepartment of Electrical and Electronics Engineering
dc.contributor.departmentGraduate School of Sciences and Engineering
dc.contributor.kuauthorBaşar, Ertuğrul
dc.contributor.kuauthorKılınç, Fatih
dc.contributor.kuauthorTaşçı, Recep Akif
dc.contributor.schoolcollegeinstituteCollege of Engineering
dc.contributor.schoolcollegeinstituteGRADUATE SCHOOL OF SCIENCES AND ENGINEERING
dc.date.accessioned2024-11-09T13:14:37Z
dc.date.issued2022
dc.description.abstractMany electrochemical devices are based on the fundamental process of ion migration and accumulation on surfaces. Complex interplay of molecular properties of ions and device dimensions control the entire process and define the overall dynamics of the system. Particularly, for ionic liquid-based electrolytes it is often not clear which property, and to what extent, contributes to the overall performance of the device. Herein we use X-ray photoelectron spectroscopy (XPS) while the device is under electrical bias. Such a procedure reveals localized electrical potential developments, through binding energy shifts of the atomic core levels, in a chemically specific fashion. Combining it with square-wave AC modulation, the information can also be extended to time domain, and we investigate devices configured as a coplanar capacitor, with an ionic liquid as the electrolyte, in macro-dimensions. Our analysis reveals that a nonlinear voltage profile across the device emerges from spatially non-uniform electrical double layer formation on electrode surfaces. Interestingly the coplanar capacitor has an extremely slow time response which is particularly controlled by IL film thickness. XPS measurements can capture the ion dynamics in the tens of seconds to microseconds range, and reveal that ionic motion is all over the device, including on metallic electrode regions. This behavior can only be attributed to motion in more than one dimension. The ion dynamics can also be faithfully simulated by using a modified PNP equation, taking into account steric effects, and device dimensions. XPS measurements on two devices with different dimensions corroborated and validated the simulation results. The present results propose a new experimental approach and provide new insights into the dynamics of ions across electrochemical devices.
dc.description.fulltextYES
dc.description.indexedbyWOS
dc.description.indexedbyScopus
dc.description.openaccessYES
dc.description.publisherscopeInternational
dc.description.sponsoredbyTubitakEuEU - TÜBİTAK
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TÜBİTAK)
dc.description.sponsorshipEuropean Union (EU)
dc.description.sponsorshipHorizon 2020
dc.description.sponsorshipReconfigurable Intelligent Sustainable Environments for 6G Wireless Networks (RISE-6G) Project
dc.description.versionPublisher version
dc.description.volume10
dc.identifier.doi10.1109/ACCESS.2022.3167841
dc.identifier.eissn1364-5498
dc.identifier.embargoNO
dc.identifier.filenameinventorynoIR03700
dc.identifier.issn1359-6640
dc.identifier.quartileQ2
dc.identifier.scopus2-s2.0-85129182544
dc.identifier.urihttps://doi.org/10.1109/ACCESS.2022.3167841
dc.identifier.wos790738400001
dc.keywordsActive RIS
dc.keywordsAmplifying RIS
dc.keywordsEnergy efficiency
dc.keywordsPerformance analysis
dc.keywordsReconfigurable intelligent surface (RIS)
dc.language.isoeng
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)
dc.relation.grantno120E401
dc.relation.grantno101017011
dc.relation.ispartofIEEE Access
dc.relation.urihttp://cdm21054.contentdm.oclc.org/cdm/ref/collection/IR/id/10561
dc.subjectEngineering
dc.titleA new RIS architecture with a single power amplifier: energy efficiency and error performance analysis
dc.typeJournal Article
dspace.entity.typePublication
local.contributor.kuauthorBaşar, Ertuğrul
local.contributor.kuauthorTaşçı, Recep Akif
local.contributor.kuauthorKılınç, Fatih
local.publication.orgunit1GRADUATE SCHOOL OF SCIENCES AND ENGINEERING
local.publication.orgunit1College of Engineering
local.publication.orgunit2Department of Electrical and Electronics Engineering
local.publication.orgunit2Graduate School of Sciences and Engineering
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