Avant-propos/Foreword. Conjugated polymler photovoltaic devices and materials. Photovoltaic performance and long term stability of dye sensitized meosocopic solar cells. Kinetically determined solar cells. Recent research progress of dye-sensitized solar cells in Japan. Dye-multilayer semiconductor nanostructures. Dye-sensitized solar cells with ionic gel electrolytes prepared from imidazolium salts and agarose. Dye-sensitized nanocrystalline solar cells incorporating ethylmethylimidazolium-based ionic liquid electrolytes. TiO2 sol-gel blocking layers for dye-sensitized solar cells. Highly efficient dye-sensitized solar cells using a composite electrolyte. Modeling of photocurrent in dye-sensitized solar cells fabricated with PVDF-HFP-based gel-type polymeric solid electrolyte. Effect of excitation wavelength on electron injection efficiency in dye-sensitized nanocrystalline TiO2 and ZrO2 films. Modeling of an equivalent circuit for dye-sensitized solar cells: improvement of efficiency of dye-sensitized solar cells by reducing internal resistance. Monitoring the reactivity of oxide interfaces in dye solar cells with photocurrent imaging techniques. Chromatographic studies of photodegradation of RuL2(SCN)2 in nanostructured dye sensitization solar cells. Exciton diffusion and interfacial charge separation in photovoltaic materials studied by microwave conductivity. Photoelectrochemical solar cells based on SnO2 nanocrystalline films.