A catalyst refers to a substance that increases the rate of a reaction without changing the overall standard Gibbs free energy change of the reaction. Ligands represent atoms, molecules, and ions that can bond with a central atom (metal or metalloid). In general, ligands will donate at least one electron when participating in a bond. Two-phase catalysis of catalysts and ligands is the first application in the field of fluorine chemistry. The method of self-fluorine two-phase catalysis has developed rapidly, and a large number of new fluorine-based catalysts and ligands (especially phosphines) have been obtained in the field of chemistry.
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Dye-Sensitized Solar Cells (DSSCs) use photosensitizers adsorbed on the surface of nanocrystalline mesoporous titanium dioxide (TiO2) films, as well as electrolytes or solid charge-transporting materials, to convert light into electricity. They have many functions, including transparency, multicolor, and low-cost fabrication, and are deployed in glass facades, skylights, and greenhouses. Sensitizers are the key to DSSCs, which drive the operation of the entire cell by continuously absorbing light to generate a flow of electrons. Each sensitizer has its corresponding absorption spectrum distribution. To improve the matching of the absorption spectrum of the sensitizer with the solar spectrum, co-sensitization of multiple sensitizers is sometimes required to improve the conversion efficiency of solar cells.
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