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- W2028052105 abstract "The mechanism of enhancing the light harvesting efficiency of dye-sensitized TiO(2) solar cells by coupling TiO(2) inverse opals or disordered scattering layers to conventional nanocrystalline TiO(2) films has been investigated. Monochromatic incident photon-to-current conversion efficiency (IPCE) at dye-sensitized TiO(2) inverse opals of varying stop band wavelengths and at disordered titania films was compared to the IPCE at bilayers of these structures coupled to nanocrystalline TiO(2) films and to the IPCE at nanocrystalline TiO(2) electrodes. The results showed that the bilayer architecture, rather than enhanced light harvesting within the inverse opal structures, is responsible for the bulk of the gain in IPCE. Several mechanisms of light interaction in these structures, including localization of heavy photons near the edges of a photonic gap, Bragg diffraction in the periodic lattice, and multiple scattering events at disordered regions in the photonic crystal or at disordered films, lead ultimately to enhanced backscattering. This largely accounts for the enhanced light conversion efficiency in the red spectral range (600-750 nm), where the sensitizer is a poor absorber." @default.
- W2028052105 created "2016-06-24" @default.
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- W2028052105 date "2005-03-11" @default.
- W2028052105 modified "2023-10-14" @default.
- W2028052105 title "Increasing the Conversion Efficiency of Dye-Sensitized TiO<sub>2</sub> Photoelectrochemical Cells by Coupling to Photonic Crystals" @default.
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- W2028052105 doi "https://doi.org/10.1021/jp044228a" @default.
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