More on Nomenclature and the Water Splitting Reaction Requirements

3 More on Nomenclature and the Water Splitting Reaction Requirements 

What about a twin photosystem configuration as in Fig. 2c Optimal efficiency (we will define efficiency soon) is reached in such a configuration when one semiconductor has an Eg value of 1.0 eV and the second 1.8 eV.66 On the other hand, it has been pointed out64 that an optimal combination would be two matched electrodes of equal 0.9-eV band gap, since, in the absence of other limitations, the photocurrent would have been dictated by the higher Eg electrode of a pair. 

Very detailed studies also have appeared on catalytic modification of semiconductor electrode surfaces to improve the HER performance the reader is referred to the many review articles and book chapters on this topic.22,29,88,135,136,1363 

Interfacial energetics in two-photosystem cells combining n- and p-type semiconductor electrodes respectively (Fig. 2c) have been discussed.67 Stability issues in photoelectrochemical energy conversion systems have been reviewed.318 

Entry number Semiconductor (s) Type of coating Specific coating (s) employed References 

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