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Hybrid Semiconductor Electrodes for Light-driven Photoelectrochemical Switches by Ming-ce Long; Radim Beranek; Wei-min Cai; Horst Kisch is a Engineering article available to read on EtoBox.

What is Hybrid Semiconductor Electrodes for Light-driven Photoelectrochemical Switches about?

Hybrid (n-/p-type) semiconductor electrodes represent a viable strategy for fabrication of wavelength-controlled optoelectronic switches. Four hybrid electrodes (BiVO 4 /Co 3 O 4 , BiVO 4 /CuO, TiO 2 /Co 3 O 4 , TiO 2 /CuO) were prepared in the form of random assemblies of nanocrystalline powders on ITO-glass and the wavelength dependence of their photocurrent response was investigated. The former three electrodes exhibited wavelength-controlled switching of photocurrent direction, whereas the latter one showed exclusively cathodic photocurrents. The prerequisite for the switching effect is that the potentials of the valence and conduction band edges of an n-type component are more positive than those of a p-type one. Further key parameters influencing the photocurrent response are the applied potential and the presence of electron and hole scavengers.

Who reads Hybrid Semiconductor Electrodes for Light-driven Photoelectrochemical Switches?

Author

Ming-ce Long; Radim Beranek; Wei-min Cai; Horst Kisch

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0013-4686)

Published

2008

Language

EN

Field

Engineering (Physical Sciences)