THE CONCEPT OF “SURFACE-TRAPPED HOLE” IN n-TYPE SEMICONDUCTORS AND THE CONDITIONS FOR EFFICIENT AND STABLE PHOTOELECTROCHEMICAL CELLS

Abstract
The competition between decomposition and electron transfer reactions at an n-GaP electrode under illumination was explained on the basis of the concept of the “surface-trapped hole”. It is concluded that an efficient and stable photoelectrochemical cell can be constructed by use of a redox couple having the standard redox potential slightly more negative than the redox potential of the surface-trapped hole.

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