Hello,

you can use any kind of salt in an aqueous solution for a contact, e.g. KCL. The
problem is that you form over the time a oxide layer at the backside. That
changes your voltage drop etc etc. You want to use also a HF based electrolyte
to have no oxide. In case of p-type you have to illuminate the back-side to form
hydrogen. You'll need no illumination in case of n-type silicon and in case of a
highly doped back-side (or wafer).
My suggestion: highly doped back-side, HF containing electrolyte with a
supporting electrolyte for a better conductivity.

If you need more information, send me an email.

With regards

Marc


Marc Christophersen, Ph.D.
Postdoc Fellow at the Center for Future Health
University of Rochester, NY
601 Elmwood Ave.
P.O. Box CFH
Rochester, NY 14642 US
Phone: (585) 273-1565
Fax:   (585) 273-2981
http://marc-christophersen.de




[email protected] schrieb am 20.11.02 18:27:14:
> Hi,
>
> I am trying to use double cell configuration to form porous silicon. Could
someone tell me if there is any electrolyte that can conduct current but will
not react with electrodes and won't get electrolyzed.
>
> Thanks.
>
> Jin Zheng _______________________________________________
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