Comparative study of the temperature-dependent dielectric properties of Au/PPy/n-Si (MPS)-type Schottky barrier diodes

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dc.contributor.authorGumus, Ahmet
dc.contributor.authorErsoz, Gulcin
dc.contributor.authorYucedag, Ibrahim
dc.contributor.authorBayrakdar, Sumeyye
dc.contributor.authorAltindal, Semsettin
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2015
dc.departmentNiğde ÖHÜ
dc.description.abstractThe dielectric properties of Au/PPy/n-Si metal-polymer-semiconductor (MPS)-type Schottky barrier diodes (SBDs) were investigated by using capacitance-voltage (C-V) and conductancevoltage (G/omega-V) measurements at various temperatures and voltages at frequencies of 100 kHz and 500 kHz. Both the real and the imaginary parts of the complex dielectric constant and dielectric loss (epsilon', epsilon aEuro(3)) and of the electric modulus (M', MaEuro(3)), as well as the conductivity (sigma (ac) ), were found to depend strongly on the temperature and the voltage. Both the C and G/omega values increased with increasing applied voltage and had inversion, depletion, and accumulation regions as with a metal-insulator-semiconductor (MIS) type behavior. Both the dielectric constant (epsilon') and the dielectric loss (epsilon aEuro(3)) increased with increasing temperature and decreased with increasing frequency. The loss tangent (tan delta) vs. temperature curve had a peak at about 200 K for both frequencies. The M' and the MaEuro(3) values decreased with increasing temperature and became independent of the frequency at high temperatures. The series resistance (R (s) ) of the diode decreased with increasing temperature for the two frequencies while the sigma (ac) increased. Such behaviors of the dielectric properties with temperature were attributed to the restructuring and reordering of charges at interface states/traps due to the varying temperature, the interfacial polarization, and the interfacial polymer layer. ln(sigma (ac) ) vs. q/kT plots had two distinct linear regions with different slopes for the two frequencies. Such behaviors of these plots confirmed the existence of two different conduction mechanisms corresponding to low and high temperatures. The values of the activation energy (E (a) ) were obtained from the slopes of these plots, and its value at low temperatures was considerably lower than that at high temperatures.
dc.identifier.doi10.3938/jkps.67.889
dc.identifier.endpage895
dc.identifier.issn0374-4884
dc.identifier.issn1976-8524
dc.identifier.issue5
dc.identifier.scopus2-s2.0-84942303764
dc.identifier.scopusqualityQ4
dc.identifier.startpage889
dc.identifier.urihttps://dx.doi.org/10.3938/jkps.67.889
dc.identifier.urihttps://hdl.handle.net/11480/3880
dc.identifier.volume67
dc.identifier.wosWOS:000361624200020
dc.identifier.wosqualityQ4
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthor[0-Belirlenecek]
dc.language.isoen
dc.publisherKOREAN PHYSICAL SOC
dc.relation.ispartofJOURNAL OF THE KOREAN PHYSICAL SOCIETY
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectAu/PPy/n-Si SBDs
dc.subjectTemperature and frequency effect
dc.subjectElectrical conductivity
dc.subjectDielectric properties
dc.subjectSeries resistance
dc.subjectPolypyrrole (PPy)
dc.subjectActivation energy
dc.titleComparative study of the temperature-dependent dielectric properties of Au/PPy/n-Si (MPS)-type Schottky barrier diodes
dc.typeArticle

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