An investigation of current oscillations on n-InP in sulphide-based electrolytes at anodic potentials

T. Melly, D. N. Buckley, S. B. Newcomb

Research output: Contribution to conferencePaperpeer-review

Abstract

In this paper, we report an investigation of factors underlying the anodic oscillatory behavior of n-InP in aqueous sulphide-based electrolytes. Current-time curves at constant potential were recorded and analyzed. The total charge passed during each oscillation was shown to be independent of electrolyte concentration over a significant range. However, the occurrence of oscillations was found to be sensitive to solution composition, potential, and the type of film present on the electrode surface. We also investigated the effect of current interruption at various phases of the oscillatory cycle. We showed that, when the potential is subsequently re-applied, the oscillations are observed to re-start at the same phase at which they were stopped. The oscillatory current region for n-InP in (NH4)2S corresponds to growth of a thick porous In2S3 layer on the electrode. The microstructure of these layers is discussed in the context of the current-time behavior. Finally we propose a mechanism for anodic oscillations on InP in (NH4)2S.

Original languageEnglish
Pages71-86
Number of pages16
Publication statusPublished - 2005
Event207th ECS Meeting - Quebec, Canada
Duration: 16 May 200520 May 2005

Conference

Conference207th ECS Meeting
Country/TerritoryCanada
CityQuebec
Period16/05/0520/05/05

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