Aqueous ionic effect on electrochemical breakdown of Si-dielectric-electrolyte interface.
Sci Rep
; 10(1): 16795, 2020 Oct 08.
Article
em En
| MEDLINE
| ID: mdl-33033305
ABSTRACT
The breakdown of thin dielectric films (SiO2, Si3N4, HfO2) immersed in aqueous electrolyte was investigated. The current and the kinetics of dielectric breakdown caused by large cathodic electric field applied across the dielectric layer reveal the electrochemical nature of dielectric materials. Electrolytes play a huge role in the established dielectric-electrolyte interface with respect to the overall electrical behavior of the system. Although aqueous cations are considered as spectator ions in most electrochemical systems, in dielectric interfaces the current-potential characteristics depend on the type of cation. Computer simulation based on density functional theory and molecular dynamics showed cations affect the dielectric strength. The responses of various dielectric films to solution components provide invaluable information for dielectric-incorporated electrochemical systems.
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MEDLINE
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En
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Sci Rep
Ano de publicação:
2020
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Article