Deconvolution of the potential and time dependence of electrochemical porous semiconductor formation

Abstract

A layer of porous InP is grown beneath a thin dense surface layer when n-InP electrodes are anodized to sufficiently high potentials in aqueous KOH solutions. The shape of the linear sweep (LSV) or the cyclic voltammogram (CV) is dependent on carrier concentration. A technique is presented to deconvolute the effects of potential and time on a CV. The results obtained from this technique are used to explain the shape of the anodic current response and its relation to porous layer formation. The accuracy of the deconvolution technique is then tested by comparison to experimental results.