AC Impedance Studies on Metal/Nanoporous Silicon/p-Silicon Structures

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygl

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Dangosydd eitem ddigidol (DOI)

Alternating current (AC) impedance measurements have been performed on 10- to 15-μm thick porous silicon layers on a (100) p-type silicon (p(+)Si) substrate with the aluminium (Al) top electrode in a sandwich configuration in the range of 20 Hz–1 MHz and in the temperature ranging between 152 K and 292 K. The ac conductivity σac was found to increase with frequency f according to the universal power law: σac=Afs where the exponent s is a frequency and temperature-dependent quantity. A hopping process is found to be dominant at low temperatures and high frequencies, while a thermally activated free band process is responsible for conduction at higher temperatures. Capacitance is found to decrease with frequency but increase with temperature. Frequency dependence of the loss tangent is observed with a temperature-dependent minimum value.
Iaith wreiddiolSaesneg
Tudalennau (o-i)2106-2111
CyfnodolynJournal of Electronic Materials
Cyfrol46
Rhif y cyfnodolyn4
Dyddiad ar-lein cynnar28 Tach 2016
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - Ebr 2017

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