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Figure 6
Preliminary photoluminescence results of the N = 50 period sample as grown together with the result of the virtual substrate. It can clearly be seen that the majority of the signal is attributed to the SL structure. The found peak is very close to the predicted fundamental bandgap of 0.61 eV (Monazam et al., 2013BB11). Nevertheless, defects could not be completely eliminated as the source of the PL of the SL structure, as discussed in the text.

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