Figure 5
Fits of the observed spectral structures. (a, b) Statistics of the trionic structure: mean distance of the peaks (a) and ratio of the intensities of the first and second trionic peaks (b) are plotted against temperature. The gray lines are guides-to-the-eye highlighting the trends; in panel a, two possible trends are included. (c) Fits (the smooth, light-gray curves) of four Type-Ib spectra of one specific NC with increasing excitation intensity, as noted at each spectrum. The spectra are normalized to the same maximum; normalization parameters are listed at each spectrum. The spectra are offset in the intensity axis for clarity; in the bottommost spectrum, the fit is broken down into the individual fitted phonon replicas (red, blue, and yellow for the first, second, and third trionic lines, respectively, and the green lines represent the corresponding one- and two-phonon replicas). (d) The values of fitting parameters; those marked with an asterisk are shared by all four spectra. The inset explains the parameters; S stands for the Huang–Rhys factor.
