Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
Aerogels are attractive structures due to their high surface area, open-mesopore structure with very low densities and particle interconnectivity, which are desirable properties for many device applications. They can be made by a facile sol-gel synthesis from low-cost metal salts to produce monolithic gels. These are dried supercritically in order to avoid surface tension at the liquid-gas interface and maintain the gel structure. SnO2 is an n-type, wide bandgap semiconductor that, when doped, can exhibit good transparency throughout the visible range of the solar spectrum and low electrical resistivity. Doped tin oxides are commonly used as transparent conducting electrodes for a wide array of applications including solar cell fabrication. Here, we synthesize antimony-doped SnO2 aerogels as thin film monoliths, serving as porous electron collectors in dye-sensitized solar cells (DSCs). We compare the doped and undoped aerogel thin films and coat them with conformal layers of TiO2 by atomic layer deposition to fabricate DSCs. Solar cell characterization, including current–voltage response and electron transport and recombination kinetics, is conducted to understand the advantages of this system, especially when using electrolytes that exhibit fast recombination.
5% antimony-doped tin oxide thin films with no TiO2 conformal layer (a) and with 150 (b) and 300 (c) ALD cycles.
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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
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