Journal
NANO LETTERS
Volume 15, Issue 3, Pages 2092-2098Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl504987h
Keywords
Auger recombination; CdSe; nanocrystal; quantum dot; trion; boundary conditions
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Funding
- Israel Science Foundation [1009/07, 1425/04]
- U.S.A.-Israel Binational Science Foundation [2006-225]
- Israel Council for High Education - Focal Area Technology [872967]
- Volkswagen Stiftung [88116]
- Russell Berrie Nanotechnology Institute
- Schulich Faculty of Chemistry, Technion
- Center for Advanced Solar Photophysics (CASP), an Energy Frontier Research Center (EFRC) - U.S. Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences (BES)
- Office of Naval Research (ONR) through the Naval Research Laboratory Basic Research Program
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We calculate the :rate nonradiative Auger recombination in negatively charged CdSe nanocrystals (NCs). The rate is nonmonotonic strongly oscillating with NC size, and sensitive to the NC surface. The oscillations result in nonexponential decay of carriers in NC ensembles. Using a standard single-exponential approximation of the decay dynamics, we determine the apparent site dependence of the Auger rate in an ensemble and,derive CdSe surface parameters consistent with the experimental dependence on size.
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