Flat band variation of n-cadmium chalcogenides in aqueous cyanide
- Clark Univ., Worcester, MA (United States)
Flatband potential, V{sub fb}, measurements of n-CdSe in alkaline ferrocyanide electrolytes substantiate trends observed for photoelectrochemical open circuit voltage, V{sub oc}, with dissolved cyanide. Similar trends comprising a negative shift of V{sub fb} and an increase in V{sub oc} with increasing concentration of cyanide are also observed for an n-CdTe alkaline ferrocyanide photoelectrochemical cell, PEC. Modification of an alkaline ferro/ferricyanide electrolyte with KCN, in an n-CdSe or n-CdTe PEC, stabilizes the photocurrent, and increases the V{sub oc} by several hundred milivolts. In an approach to the high cyanide concentration limit, V{sub fb} for both n-CdSe and n-CdTe in alkaline ferrocyanide appraches a single limiting value of -1.2 V vs ferro/ferricyanide. 32 refs., 6 figs., 2 tabs.
- OSTI ID:
- 263204
- Journal Information:
- Journal of Physical Chemistry, Vol. 100, Issue 21; Other Information: PBD: 23 May 1996
- Country of Publication:
- United States
- Language:
- English
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