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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

✍ Scribed by B.H. Erné; D. Vanmaekelbergh; I.E. Vermeir

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 891 KB
Volume: 38
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(93)80153-q

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✦ Synopsis

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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Ahstrati-The photocurrent enhancement by HIO, at the n-InP anode was studied by a combination of dc and optoelectrical impedance measurements. It was found that this enhancement is connected with the anodic dissolution of the semiconductor itself. A reaction scheme is proposed for the dissolution me