Chemical modifications of Hg0.1Cd0.9Te surfaces: Analysis with Auger electron spectroscopy

1 July 1989

journal article
Published by American Vacuum Society in Journal of Vacuum Science & Technology A

Vol. 7 (4) , 2570-2574
https://doi.org/10.1116/1.575798

Abstract

It was previously found that n‐type Hg_(1−x)Cd_xTe with 0.7<x<0.9 can have good photoresponse (albeit relatively poor stability) if a series of appropriate surface treatments are used. In order to have a better control on the state of the surface it was desirable to analyze it by Auger electron spectroscopy, during each of the stages of surface preparation. It is shown that photoelectrochemical etching under certain conditions which is followed by KCN treatment leads to a stoichiometric surface which then produces the best photoresponse.

Keywords

MERCURY TELLURIDES
CADMIUM TELLURIDES
TERNARY ALLOY SYSTEMS
SURFACE TREATMENTS
SOLAR CELLS
FABRICATION
ETCHING
PHOTOCHEMICAL REACTIONS
AUGER ELECTRON SPECTROSCOPY
STOICHIOMETRY
PHOTOSENSITIVITY
(HG
CD)TE

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