期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 119, 期 37, 页码 21294-21303出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.5b02174
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资金
- Center for Bio-Inspired Solar Fuel Production, an Energy Frontier Research Center - U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001016]
- Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences, and Energy Biosciences, Department of Energy [DE-FG02-03ER15393]
- Research Corporation for Science Advancement
- Department of Chemistry
- Secyt-UNRC
- CONICET
- ANPCYT
Excited-state hole injection into the valence band of Cu5Ta11O30 nanoparticles (NP-Cu5Ta11O30) was investigated through sensitization with zinc porphyrin dyes using simulated solar irradiance. The Cu5Ta11O30 nanoparticles were prepared by a flux-mediated synthesis and found to have an average particle size of similar to 10-15 nm by DLS and TEM. The zinc 4-(10,15,20-tris(4-pyridinyl)-porphin-5-yl)phenylphosphonic acid (D1) and its analogue, in which the pyridine groups are methylated (D2), were synthesized and found to have excited-state reduction potentials appropriate for p-type dye sensitization of the nanoparticles. The dye-sensitized NP-Cu5Ta11O30 exhibited fluorescence quenching consistent with electron transfer from the NP-Cu5Ta11O30 to the dye; forward and recombination rates were obtained by transient absorption measurements. Hole injection times of 8 ps and <100 fs were observed for D1 and D2, respectively. Nanoparticulate films of Cu5Ta11O30 were prepared and evaluated in dye-sensitized solar cells under simulated solar irradiance (AM 1.5 G, 100 mW/cm(2)). Measurable photocurrents and open-circuit potentials (V-oc) of 200 and 110 mV were observed using D1 and D2, respectively.
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