Efficient lateral electron transport inside a monolayer of aromatic amines anchored on nanocrystalline metal oxide films

Article Abstract:

The mechanics of lateral electron transport inside a monolayer of a phosphonated triarylamine adsorbed on nanocrystalline TiO2, ZrO2 or Al2O3 film deposited on conducting glass was investigated. Electrochemical and spectroelectrochemical experiments on nanocrystalline electrodes derivatized by triarylamine were conducted for this purpose. Experimental results showed that the monolayer exhibits reversible electrochemical and electrochromic behavior, although the reduction-oxidation potential of the electroactive molecules depends on the forbidden band of the semiconducting or insulating oxides.

Monomolecular films, Aromatic amines, Crystalline polymers, Metal oxide semiconductors

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The role of surface states in the ultrafast photoinduced electron transfer from sensitizing dye molecules to semiconductor colloids

Article Abstract:

Investigations on the ultrafast electron injection mechanism from the dye alizarin to wide band gap semiconductor colloids aqueous medium are presented, combined with detailed studies on population, depopulation and relaxation phenomena in trap states and their influence on the injection process. The measurements underline the crucial role of trap states in the injection mechanism of electrons from dye molecules to semiconductor surfaces.

Relaxation phenomena, Relaxation (Physics), Chemical properties, Alizarin

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Surface photovoltage spectroscopy of dye-sensitized solar cells with TiO2, Nb2O5, and SrTiO3 nanocrystalline photoanodes: indication for electron injection from higher excited dye states

Article Abstract:

The behavior of three different mesoporous, nanocrystalline membranes of semiconducting oxides as electrodes in dye-sensitized solar cell structures are presented. The results indicated involvement of electron injection from higher excited-state energy levels of dye molecules into the oxide conductors onto which the dye is attached by a chemical bond.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Columbium, Observations, Titanium dioxide, Chemical bonds, Niobium

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