Figure 4.

Temperature dependence of the normalized calculated PL spectra as obtained in Figure1. With d1 = 3 nm, d2 = 2 nm, and NA = 6 × 1018 cm−3. From T = 2 K to T = 200 K, we have two peaks with close energies, which correspond to E1-HH1 and E1-LH1 electronic transitions. After that, for T = 300 K, there appear three more peaks, in addition to the first two lowest peaks, which are ascribed to the recombination involving the other excited hole states.

de Oliveira et al. Nanoscale Research Letters 2012 7:607   doi:10.1186/1556-276X-7-607
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