Water --- a source electrically active centres in CdHgTe
Sidorov Yu.G. 1, Sidorov G. Yu. 1, Varavin V.S. 1
1Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Email: sidorov@isp.nsc.ru, george@isp.nsc.ru, varavin@isp.nsc.ru

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Influence of water solutions with various pH and electrochemical treatment in cathode position on concentration of charge carriers in samples CdxHg1-xTe with x=0.2-0.3 is investigated. Cathodic treatment cadmium-mercury-tellurium at small density current increases concentration of donors, and at high density acceptors are formed. It is supposed that hydroxyl groups create acceptors centers, introduce in interstitial cadmium-mercury-tellurium. At treatment for a long time (it is more than 20 h) or acceptors are formed with concentration at level of 1016 cm-3 (at high activity of hydrogen), or donors with concentration of 1014 cm-3 (at low activity of hydrogen) are uniform distribution on all thickness of cadmium-mercurytellurium film and does not vary with the subsequent increase in time of treatment. Keywords: CdHgTe, electrochemical treatment, acceptors, activity of hydrogen.
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