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Peak PL intensity, as a function of postgrowth annealing temperature. Inset shows the peak emission energy (as-grown) at room temperature.
Integrated PL intensity with temperature. Solid lines are fits to data using the dual activation energy model (see Ref. 9). Inset shows the high temperature data for the 420–460 °C samples.
HR–XRD scans for the different growth temperatures.
Peak PL energy with temperature for the different growth temperatures, taken under excitation. Inset shows the peak shift for low temperatures. The peak uncertainty was .
Peak PL shift with temperature under a reduced excitation density of . Localization effects were considerably more pronounced, including a clear S shape for the 470 °C sample.
PL spectra at 25 K for the different growth temperature samples.
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