High-Frequency Negative Capacitance in Graphene Quantum Dots/ Lanthanum(III) Hydroxide-based MIS Heterostructure

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dc.authoridYıldız, Mustafa / 0000-0001-5833-7499
dc.contributor.authorAnter, Aslıhan
dc.contributor.authorUlusoy, Murat
dc.contributor.authorPolat, Barış
dc.contributor.authorYıldız, Mustafa
dc.contributor.authorDi Bartolomeo, Antonio
dc.contributor.authorBi, Jinshun
dc.contributor.authorOrhan, Elif
dc.date.accessioned2025-01-27T20:39:12Z
dc.date.available2025-01-27T20:39:12Z
dc.date.issued2025
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractLanthanides have significant potential for electronic technologies based on graphene quantum dots (GQDs), as they have unique electronic configurations characterized by 4f electrons. In this context, lanthanum(III) hydroxide nanoparticles (La(OH)3NPs) are used as dopants for polyethyleneimine (PEI)-doped nitrogen (N)-doped graphene quantum dots(PEIGQDsN) in this study. Using a novel green method, the La(OH)3NPs-doped PEI GQDs N nanocomposites are prepared from La(NO)3 in a single step and exploited as an interlayer in a metal/interlayer/ semiconductor (MIS) heterojunction with Au and n-Si. Capacitance & conductance-voltage (C-V & G/omega-V) characteristics of the Au/La(OH)3NPs doped PEI GQDs N /n-Si MIS heterojunction have been investigated as a function of frequency in the wide 500 Hz to 3 MHz range from-3 V to 5 V, at 300 K. It has been observed that the structure is highly sensitive to the frequency. In particular, at high frequencies, above 1.5 MHz, the positive capacitance (PC) transforms into a negative capacitance (NC) in forward bias. In addition, impedance measurements at high frequencies were carried out after the measurements in the dark, while the surface of the structure was illuminated at 100 mW/cm2. At the frequencies of 2 MHz and 3 MHz, where inductive behavior was observed, the light refilled the depleted trap levels, catalyzing the transition from NC to PC in forward bias. These findings suggest that the capacitance and conductance of the heterojunction have a remarkable frequency sensitivity, particularly evident at higher frequencies. The outcomes of this study are poised to significantly influence the comprehension of carbon-lanthanides-based electronic technology, and enable the creation of new hybrid functional materials for use in electronic or optoelectronic applications.
dc.description.sponsorshipScientific Research Council of Gazi University (BAP) [FGA-2022-8252]; REACT-EU PON Research and Innovation 2014-2020 project of the European Union; Italian Ministerial Decree [1062/2021]; University of Salerno [ORSA235199]
dc.description.sponsorshipThis study was funded by the Scientific Research Council of Gazi University (BAP) grant number FGA-2022-8252, the REACT-EU PON Research and Innovation 2014-2020 project of the European Union, the Italian Ministerial Decree 1062/2021 and the University of Salerno, grant number ORSA235199.
dc.identifier.doi10.1016/j.flatc.2024.100781
dc.identifier.issn2452-2627
dc.identifier.scopus2-s2.0-85209682694
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.flatc.2024.100781
dc.identifier.urihttps://hdl.handle.net/20.500.12428/23888
dc.identifier.volume49
dc.identifier.wosWOS:001364488000001
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofFlatchem
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectLanthanum (III) hydroxide nanoparticles
dc.subjectGraphene quantum dots
dc.subjectGreen method
dc.subjectNanocomposite diode
dc.subjectNegative/positive capacitance behaviors
dc.titleHigh-Frequency Negative Capacitance in Graphene Quantum Dots/ Lanthanum(III) Hydroxide-based MIS Heterostructure
dc.typeArticle

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