期刊
CHEMISTRY OF MATERIALS
卷 24, 期 4, 页码 659-663出版社
AMER CHEMICAL SOC
DOI: 10.1021/cm202218w
关键词
titanium dioxide; functional coatings; mesoporous metal oxides; nanoparticles; dye-sensitized solar cells
资金
- Nanosystems Initiative Munich (NIM)
- LMUexcellent
- DFG in Germany
- Elite-Network Bavaria (IDK-NBT)
The brick and mortar approach is employed to synthesize thick surfactant-templated mesoporous titanium dioxide films of up to 10 pm thickness using multilayer deposition. The films exhibit very high surface areas scaling linearly with the thickness, and roughness factors of up to 1600 cm(2)/cm(2) can be reached. For the first time, surfactant-derived mesoporous titanium dioxide films of such a large thickness and surface area can be prepared without serious cracking, delamination, or deterioration of the porous structure. The mesopores are rather large (12 nm), and stacking many layers does not affect their size or accessibility, which is shown by krypton and dye adsorption experiments. Applied in dye-sensitized solar cells, the films feature a high power conversion efficiency of over 7% already at thicknesses below 4 mu m due to their high surface area and dye adsorption.
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