Comment on "diffusion impedance and space charge capacitance in the nanoporous dye-sensitized electrochemical solar cell" and "electronic transport in dye-sensitized nanoporous TiO2 solar cells-comparison of electrolyte and solid-state devices"

Article Abstract:

The identified large capacitance, as explained in the literature on nanoporous TiO2 electrodes permeated with a liquid electrolyte and dye-sensitized solar cells, that increases exponentially is explained in terms of diffusion capacitance, by adopting an analogy of nanoporous TiO2 electrodes with solid-state pn-junctions. It is argued that this capacitance can be defined locally in the film volume, that it is not diffusional in origin, and neither related to charge separation in the electrostatic capacitor at the junction.

Electric properties, Batteries

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Effective photogeneration in TiO2/VO2/TiO2 multilayer film electrodes prepared by a sputtering method

Article Abstract:

The effective separation of photogenerated electrons and holes in the TiO2/VO2/TiO2 multilayer film electrodes prepared by a sputtering method is studied, in which a very thin VO2 layer is inserted into the space charge layer of a TiO2 electrode. An enhanced photogeneration is observed by inserting the thin VO2 layer of ~2 nm in thickness at a position where the electric field gradient is considered to be large and by adjusting the Fermi level of the system to the 3d-levels of V (super 4+).

Thin films, Multilayered, Multilayered thin films, Electrodes

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Viscoelastic and structural properties of phenyl-modified polysiloxane system with a three-dimensional structure

Article Abstract:

The relationships between the viscoelastic and structural properties of glass-forming materials with polysiloxane bonds, which serve as network formers, and phenyl groups, which act as network terminators, are examined. The findings conclude that introducing larger numbers of Ph groups makes the viscosity less sensitive to structural factors.

Viscosity, Polysilicon, Structure, Phenyl compounds

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