HYDROGEN PHOTOEVOLUTION ON InGaP POLYCRYSTALLINE AND TANDEM-TYPE ELECTRODES*)

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Abstract

We report on preparation of p-In1−xGaxP polycrystalline, p-In0.5Ga0.5P/p-GaAs, and p-In0.5Ga0.5P/n-GaAs/n-InP tandem-type cathodes. The photovoltaic efficiency of InGaP tandem type epitaxial electrodes is two times higher than that of polycrystalline photocathodes. The most significant advantage of epitaxial electrodes is in their markedly better corrosion resistance in comparison with polycrystalline photocatodes.

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