Photosensitized electrolyte oxidation

Fujishima A, Sugiyama E, Honda K (1971) Photosensitized electrolytic oxidation of iodide ions on cadmium sulfide single crystal electrode. Bull Chem Soc Japan 44 304 Inoue T, Watanabe T, Fujishima A, Honda K, Kohayakawa K (1977) Suppression of surface dissolution of CdS photoanode by reducing agents. J Electrochem Soc 124 719-722 Elhs AB, Kaiser SW, Wrighton MS (1976) Visible light to electrical energy conversion. Stable cadmium sulfide and cadmium selenide photoelectrodes in aqueous electrolytes. J Am Chem Soc 98 1635-1637... 

Fujishima A, Sugiyama E, Honda K (1971) Photosensitized electrolytic oxidation of iodide ion on cadmium sulfide single crystal electrode. Bull Chem Soc Jpn 44 304... 

Photosensitized Electrolytic Oxidation of Iodide Ions on Cadmium Sulfide Single Crystal Electrode. The stability of CdS probe under irradiation in an electrolyte containing iodide species. Rotating ring disk voltammetry was used as the methodology. 487... 

Fujishima A., Honda K. and Kikuchi S. (1969), Photosensitized electrolytic oxidation on semiconducting n-type Ti02 electrode , J. Chem. Soc. Jpn. 72, 108-113. 

In such devices the light-absorbing semiconductor electrode immersed in an electrolyte solution comprises a photosensitive interface where thermodynamically uphill redox processes can be driven with optical energy. Depending on the nature of the photoelectrode, either a reduction or an oxidation half-reaction can be light-driven with the counterelectrode being the site of the accompanying half-reaction. N-type semiconductors are photoanodes, p-type semiconductors are photocathodes, and... 

A promising application of this new functionalization method of metal oxides relates to the photosensitization of semiconducting oxides to convert light into electricity. Thus, using the cavity microelectrode technique, a significant photocurrent is produced under blue light illumination by Ic- and Id-modified, F-doped and undoped Sn02 nanoporous powders, in the presence of an aqueous electrolyte, the... 

Injection of electrfflis or holes from the illuminated layer of sensitizer dye leaves the dye in its oxidized or reduced state, respectively. As a consequence the dye layer usually degrades under illumination. In order to prevent this, a supersensitizer is added to the electrolyte. In the case of injection of electrons, the supersensitizer is an electron donor species such as iodide which regenerates the dye from its oxidized state. In the case of hole injection by the dye, an electron acceptor can be used as a supersensitizer. Provided that dye regeneration is faster than degradation reactions, the photosensitized system is stable. 

The general scheme of a QDSC device is similar to the DSC concept. Light excites electron-hole pairs in the QDs. The electrons are injected into nanostructured Ti02 electrode (photosensitization), and they are transported to the transparent conductive oxide electrode. The holes are injected into the liquid or solid electrolyte which acts as a hole-transporting medium. The resulting holes are transported to the counterelectrode, where the oxidized... 

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