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Hyperbranched quasi-1D Nanostructures for Solid-State Dye-Sensitized Solar Cells

Hyperbranched quasi-1D Nanostructures for Solid-State Dye-Sensitized Solar Cells

Luca Passoni, Farbod Ghods, Pablo Docampo, Agnese Abrusci, Javier Martí-Rujas, Matteo Ghidelli, Giorgio Divitini, Caterina Ducati, Maddalena Binda, Simone Guarnera, Andrea Li Bassi, Carlo Spartaco Casari, etc.

ACS Nano. 2013 Nov 26;7(11):10023-31.

PMID: 24180577

Abstract:

In this work we demonstrate hyperbranched nanostructures, grown by pulsed laser deposition, composed of one-dimensional anatase single crystals assembled in arrays of high aspect ratio hierarchical mesostructures. The proposed growth mechanism relies on a two-step process: self-assembly from the gas phase of amorphous TiO2 clusters in a forest of tree-shaped hierarchical mesostructures with high aspect ratio; oriented crystallization of the branches upon thermal treatment. Structural and morphological characteristics can be optimized to achieve both high specific surface area for optimal dye uptake and broadband light scattering thanks to the microscopic feature size. Solid-state dye sensitized solar cells fabricated with arrays of hyperbranched TiO2 nanostructures on FTO-glass sensitized with D102 dye showed a significant 66% increase in efficiency with respect to a reference mesoporous photoanode and reached a maximum efficiency of 3.96% (among the highest reported for this system). This result was achieved mainly thanks to an increase in photogenerated current directly resulting from improved light harvesting efficiency of the hierarchical photoanode. The proposed photoanode overcomes typical limitations of 1D TiO2 nanostructures applied to ss-DSC and emerges as a promising foundation for next-generation high-efficiency solid-state devices comprosed of dyes, polymers, or quantum dots as sensitizers.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP652145283	D102 Dye		652145-28-3	Price

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