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

descriptionPublicationkeyboard_double_arrow_right Article 01 Dec 1993 Netherlands English Publisher:Elsevier BVJournal:Electrochimica Acta, volume 38, pages 2,559-2,567 (issn: 0013-4686,

Authors: I.E. Vermeir; Ben H. Erné; Daniel Vanmaekelbergh;

doi: 10.1016/0013-4686(93)80153-q

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

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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.

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Netherlands

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Keywords

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

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