Silicon protected with atomic layer deposited TiO2: conducting versus tunnelling through TiO2
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Contactless dye-sensitised nano-photoelectrodes assembled at polarisable liquid|liquid interfaces exhibit photocurrent responses originating from the heterogeneous photooxidation of ferrocene by the colloids. The photocurrent spectra of the nanoparticle as ...
This thesis presents a new type of photovoltaic solar cell based on dye-sensitized nanocrystalline titanium dioxide electrodes. In contrast to conventional solar cells, where light absorption is due to band gap excitation of the semiconductor itself, TiO2 ...
The dye solar cell, is a novel photoelectrochemical solar cell presenting unique advantages, as the use of low cost materials and the potential simplicity of manufacturing. However, a liquid electrolyte is actually required for the transport of the photoge ...
Transparent nanostructured NiO electrodes were prepd. by heating Ni(OH)2 sol-gel films at 300-320°. Nanostructured NiO (bunsenite) behaves as a p-type semiconductor and has an indirect band gap of 3.55 eV. It shows a strong anodic electrochromic effect, as ...
A complete system for cleavage of water by light (250‐W lamp) comprises the catalysts Pt and RuO2 and the sensitizer Ru(bpy) as well as the acceptor methylviologen (MV2+). 150 ml of solution gave 0.6 ml of H2 and 0.3 ml of O2 in h. ...
Nanostructured anatase TiO2 electrodes surface modified with inorg. metal oxide clusters, i.e., phosphotungstic acid (PWA), was studied by XPS and spectroelectrochem. The surface modifiers were electroactive and could be addressed reversibly by changing th ...
Impedance measurements of meso-porous TiO2 electrodes in contact with aq. and nonaq. electrolytes have been performed in the dark and under UV illumination. In the dark the differential capacitance was found to be dominated by the back contact. Bandgap exc ...
Photoelectrochem. measurements have been performed on film electrodes consisting of linked nano-sized TiO2 colloids. The film thickness ranged from 1-40 μm. The film network was attached to a thin transparent conducting layer of SnO2 allowing for photogene ...
We report the observation of midinfrared intersubband (ISB) absorption in nearly lattice-matched AlInN/GaN multiple-quantum-wells. A clear absorption peak is observed around 3 mu m involving transitions from the conduction band ground state to the first ex ...