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(Color online) (a) Photoluminescence (PL) spectra for CdSe single layer quantum dots (SLQDs) and for the double layer QD structures at . (b): The shift of the three PL peak energies as a function of temperature. The PL from CdZnMnSe QDs is shifted by . The FWHM values of the PL peaks are shown in the inset.
(Color online) (a) PL decay for CdSe and CdZnMnSe QDs at , showing their PL peak energies on a logarithmic scale. The zero on the time delay scale corresponds to the time of maximum PL intensity. [(b) and (c)] PL spectra with various time delays for CdSe and CdZnMnSe QDs in the structure, after pulsed laser excitation at .
(Color online) (a) Dependence of the PL decay time on photon energy for CdSe SLQDs at (∎), (▴), (●), and (▵). The PL spectrum for is also shown in the figure. (b) PL lifetime for CdSe QDs as a function of temperature at PL peak energy (∎), and at half-height above (●) and below (엯) the PL peak. The short and relatively independent of energy PL lifetime for the CdZnMnSe QD (◻) is also included in the figure.
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