The anodic dissolution of InP studied by the optoelectrical impedance method-1. Competition between electron injection and hole capture at InP photoanodes

B. H. Erné*, D. Vanmaekelbergh, I. E. Vermeir

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

The photoanodic dissolution of n-InP in hydrochloric acid (pH 0) was studied by a combination of dc measurements and optoelectrical impedance measurements. It was found that electron injection from decomposition intermediates into the conduction band competes with hole capture in three of the six electrochemical steps. From a detailed analysis of the optoelectrical impedance, the precise sequence of the electron injection steps was deduced and the rate constants for hole capture and electron injection could be estimated.

Original languageEnglish
Pages (from-to)2559-2567
Number of pages9
JournalElectrochimica Acta
Volume38
Issue number17
DOIs
Publication statusPublished - Dec 1993

Keywords

  • anodic dissolution mechanisms.
  • indium phosphide
  • optoelectrical impedance spectroscopy
  • photoelectrochemistry

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