Photoelectrode system

Other dye-layer-coated photoelectrode systems have been studied but are not covered in this review due to space restrictions. This area of study, including the photoelectrochemistry of Chi, is still in an inchoate but rapidly developing stage. 

To design, fabricate and test prototype photoelectrode systems for efficiency and stability. 

A new photoelectrode system for the photoelectrolysis of water and employing In203-admixed with nanostructured Ti02 has been described. ... 

Figure 7.6b illustrates a single-electrode variation of the photoelectrode system comprising anode and cathode surfaces at opposite faces of a single monolithically integrated device. In this configuration, electron transfer is readily achieved through the body of the electrode, but pathways for ionic transfer in the electrolyte need to be provided around the electrode body to minimize solution conductivity losses. Electron transmission loss is reduced, as is system part count. This offers potential cost reduction. 

Type-3 Photoelectrode System A fixed array of planar PEC photoelectrodes immersed in an electrolyte reservoir, tilted toward the sun at local latitude angle, producing hydrogen at atmospheric pressure. 

Type-4 Photoelectrode System with Moderate Concentration A PEC solar concentrator system, using reflectors to focus the solar flux at a 10 1 intensity ratio onto planar PEC photoelectrodes immersed in an electrolyte reservoir and pressurized to 300 psi. 

In PEC photoelectrode systems, the semiconductor/electrolyte interface can form a rectifying jtmction, similar to the solid-state pn junctions or Schottky diode jtmctions used in solar cells. Such rectifying junctions exhibit built-in electric fields... 

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