Figure 4

Temperature dependence of the normalized calculated PL spectra as obtained in Figure1. With d₁ = 3 nm, d₂ = 2 nm, and N _A  = 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.