I. Ground-state association between phenothiazine and tris(diimine)ruthenium(II) complexes: its role in highly efficient photoinduced charge separation. II. Ligand modifications of cobalt complexes to increase efficiency of electron-transfer mediators in dye-sensitized solar cells
Supramolecular triad assemblies consisting of a central trisbipyridineruthenium(II) chromophore (C2+), with one or more appended phenothiazine electron donors (D) and a diquat-type electron acceptor (A2+) have been shown to form long-lived photoinduced charge separated states (CSS) with unusually high quantum efficiency. Up to now, there has been no explanation for why such large efficiencies (often close to unity) are achieved from these systems when other, seemingly similar, systems are often much less efficient. In the present study, using a bimolecular system consisting of chromophore-acceptor ...
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