Figure 4.

Spectral evolution in time. Simulated spectra for different times after a pulsed excitation of the entire ensemble of NCs, acquired from Equation 8. The spectral dependence of PL decay time, τ_PL(E_g), has been obtained experimentally. Left inset: PL intensity decay for detection wavelength of 800 nm. The red line indicates a fit with a stretched exponential function. Right inset: Experimentally determined PL lifetimes for different wavelengths (black squares). The red line shows an extrapolation for longer wavelengths.