Hierarchical SnO2 octahedra consisting of SnO2 nanoparticles (≈30 nm in diameter) can be successfully fabricated by a fast sonochemical process followed by heat treatment (see figure). The dye-sensitized solar cell based on the photoelectrodes consisting of the bifunctional hierarchical octahedral SnO2 shows a power conversion efficiency of 6.40 %.
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Wang et al. (2010) studied this question.
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