期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 131, 期 7, 页码 2424-+出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja808084y
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资金
- Deutsche Forschungsgemeinschaft (DFG) [WA 1850/2-2, SFB 625]
Ultrafast ET with a characteristic time constant of -70 fs between CdSe QDs (mean radii of 1.4 nm) photoexcited in the lowest 1S electron state (lambda(exc) = 539 nm), and the molecular electron acceptor MV2+ adsorbed on the QD surface was observed. The photophysics of such a system was investigated by time-resolved transient absorbance spectroscopy in the UV-visible spectral region. Our studies for the coupled system as a function of excitation intensity at lambda(exc) = 387 nm show that the ET processes compete efficiently with Auger recombination in CdSe QDs and at (east 4 e-h pairs can be separated by ET to the electron acceptor MV2+.
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