Full text loading...
(a) Examples of multilayered QDs. A: CdSe core; B: Sample ML CdS; C: Sample ML CdZnS; D: Sample ML ZnS; E: Sample ML ZnS. [(b) and (c)] PL images of single CdSe/CdS/ZnCdS/ZnS QDs with a fully opened entrance slit of the spectrometer and with a narrower slit for measuring the blinking of an individual QD. [(d) and (e)] Fluorescence trajectory segments (d) and the corresponding photon-count histograms (e) for sample E over a 60 s period with a 10 ms integration time at an excitation intensity of .
The log-log plots of the time dependence of and from experimental data of samples A to E at 300 K and at excitation intensity of . The data (square points) are fitted to in (a) and in (b), respectively (solid lines).
The fitting results of the power-law exponents and the parameter . [(a) and (b)] Variations in the power-law exponents and with respect to the number of shell MLs excited at . (c) Variations in the parameter with respect to the excitation power for samples A to E, respectively.
(a) The potential energy functions of multilayered QDs. (b) The fluorescence spectrum of sample E with a 10 ms integration time at 300 K and at excitation intensity of . (c) Variation in the PL-peak position with respect to the number of shell MLs.
Article metrics loading...