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- W2611718170 abstract "Four complexes of the general form cis-Ru(phen′)(dcb)(NCS)2, where dcb is 4,4′-(CO2H)2-2,2′-bipyridine and phen′ is 1,10-phenanthroline (phen), 4,7-(C6H5)2-phen (Ph2-phen), 4,7-(CH3)2-phen (Me2-phen), or 3,4,7,8-(CH3)4-phen (Me4-phen), were anchored to mesoporous TiO2 thin films for applications as sensitizers in dye-sensitized solar cells (DSSCs). The compounds displayed metal based reductions Eo(RuIII/II) = 1.01 ± 0.05 V vs NHE and were potent reductants competent of excited-state electron transfer to TiO2 with yields ϕinj ≥ 0.75 in acetonitrile electrolytes. Average charge recombination rate constants, kcr, abstracted from nanosecond transient absorption measurements, and the apparent diffusion coefficients for lateral hole-hopping, abstracted from chronabsorptometry measurements, showed the same sensitizer dependency: Ru(Me4-phen) > Ru(Ph2-phen) > Ru(Me2-phen) ≈ Ru(phen). When used in operational solar cells, Ru(Ph2-phen) was most optimal with an efficiency of (6.6 ± 0.5)% in ionic liquids under 1 sun illumination. The superior performance of Ru(Ph2-phen) was traced to a higher injection yield and more efficient regeneration due to an unusually small sensitivity of kcr to the number of injected electrons." @default.
- W2611718170 created "2017-05-12" @default.
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- W2611718170 date "2017-05-04" @default.
- W2611718170 modified "2023-10-11" @default.
- W2611718170 title "Correlation Between Charge Recombination and Lateral Hole-Hopping Kinetics in a Series of <i>cis</i>-Ru(phen′)(dcb)(NCS)<sub>2</sub> Dye-Sensitized Solar Cells" @default.
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- W2611718170 doi "https://doi.org/10.1021/acsami.7b01542" @default.
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