Hierarchically ordered macro-mesoporous TiO2 films (Ti-Ma-Me) were fabricated on fluorine-doped tin oxide (FTO) substrates through the confinement self-assembly method. The prepared Ti-Ma-Me possesses periodically ordered structure and a large specific surface area, which was applied as an interfacial layer between the nanocrystalline TiO2 film (P25-TiO2) and FTO electrode in the dye-sensitized solar cell (DSSC). The introduction of a Ti-Ma-Me interfacial layer increased the short-circuit current density (Jsc) from 7.49 to 10.65 mA/cm2 and the open-circuit voltage (Voc) from 0.65 to 0.70 V as the result of its improved light harvesting efficiency by allowing for the high roughness factor and enhanced multiple internal reflection or scattering as well as reducing the back-transport reaction by blocking direct contact between the electrolyte and FTO electrode. Therefore, the photovoltaic conversion efficiency (?) was improved by 83 % from 3.04 % to 5.55 %, as compared to a device using a bare P25 TiO2 photoanode.

Efficient dye-sensitized solar cells: Introduction of interfacial layer with hierarchically macro-mesoporous TiO<sub>2</sub> film

243rd National Meeting (2012)

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Efficient dye-sensitized solar cells: Introduction of interfacial layer with hierarchically macro-mesoporous TiO2 film

Efficient dye-sensitized solar cells: Introduction of interfacial layer with hierarchically macro-mesoporous TiO₂ film