Influence of bin time and excitation intensity on fluorescence lifetime distribution and blinking statistics of single quantum dots

Der-Hau Lee; Chi-Tsu Yuan; Tachiya, M.; Jau Tang
October 2009
Applied Physics Letters;10/19/2009, Vol. 95 Issue 16, p163101
Academic Journal
In this study of single CdSe/ZnS quantum dots in a polymethyl methacrylate (PMMA) matrix, we report narrowing of fluorescence lifetime distribution with increased bin time or excitation intensity mostly due to statistical variance of photon counts per bin and Auger relaxation. We also observed saturation for the excitation intensity dependence of the exponential bending rate for the blinking statistics for quantum dots in PMMA but not on glass.


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