Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 132, Issue 13, Pages 4580-+Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja100396n
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Funding
- U.S. DOE Office of Science [DE-FG02-87ER13808]
- NU-NSEC
- Energy Frontier Research center [DE-SC0001059]
- DOE Office of Basic Energy Sciences [DE-SC0000989]
- Army Research Office
- U.S. Department of Energy (DOE) [DE-FG02-87ER13808] Funding Source: U.S. Department of Energy (DOE)
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Nickel bis(dicarbollide) is used as a fast, one-electron outer sphere redox couple in dye-sensitized solar cells. Device performances with this anionic shuttle are investigated with different electrolyte concentrations and additives, using only 0.030 M of the Ni(III) bis(dicarbollide) to efficiently regenerate the ruthenium dye. Atomic layer deposition of Al2O3 on the nanoparticulate TiO2 photoanodes is further used to improve device performances, increasing current densities almost 2-fold and attaining power conversion efficiencies similar to 10x greater than its metallocene analogue, ferrocene/ferrocenium. Open-circuit voltage decay is used to probe the kinetics of the Ni(III)/(IV) bis(dicarbollide) redox couple, and electron interception is found to be similar to 10(3)x slower than ferrocene/ferrocenium, explaining the large discrepancy in open-circuit voltage potentials between these two redox shuttles.
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