The effect of the dynamic adsorption mode on impedance of composite structures with porous silicon

Impedance and optical properties of pressed composites based on microcrystalline and nanoporous silicon powders were studied. Porous silicon crystallites were obtained by stain etching of initial microcrystalline silicon powder. Oxygen passivation of the surface during porous-powder formation provid...

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Published inSemiconductors (Woodbury, N.Y.) Vol. 44; no. 10; pp. 1342 - 1348
Main Authors Karlach, A. Yu, Kuznetsov, G. V., Litvinenko, S. V., Milovanov, Yu. S., Skryshevsky, V. A.
Format Journal Article
LanguageEnglish
Published Dordrecht SP MAIK Nauka/Interperiodica 01.10.2010
Springer
Subjects
Adsorption
Amorphous
Analysis
Magnetic Materials
Magnetism
Microcrystalline Semiconductors; Semiconductor Composites
Organic
Physics
Physics and Astronomy
Porous
Powders
Silicon
Toy industry
Vitreous
Imped Ance
Silicon Powder
Porous Silicon
External Reactant
Composite Structure
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Summary:Impedance and optical properties of pressed composites based on microcrystalline and nanoporous silicon powders were studied. Porous silicon crystallites were obtained by stain etching of initial microcrystalline silicon powder. Oxygen passivation of the surface during porous-powder formation provided stability of composite characteristics. An analysis of experimental dependences of the impedance in a frequency range of 1–10 6 Hz allowed separation of contributions of grain bulk and crystallite interfaces to the total composite conductivity. The results of the study of the time dependences of the impedance were used to determine the variation rates of electrical parameters of composite structures under dynamic adsorption-desorption influence of external reactants (H 2 O and C 2 H 5 OH).
ISSN:1063-7826
1090-6479
DOI:10.1134/S1063782610100179