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Plot of normalised integrated PL intensity per unit power at 10 K versus peak excitation power density.
Normalised time integrated PL spectra for 3330 MW/cm2 per pulse (solid line) and 95 MW/cm2 per pulse (dotted line).
Photoluminescence time decay curves measured for detection energy of 2.695 eV with the indicated peak power excitation densities per pulse.
(a) Time integrated photoluminescence spectrum for an excitation power density of 3640 MW cm−2 pulse−1 compared with time resolved spectra taken with time windows (b) 17–89 ns, (c) 5–17 ns, (d) 2–5 ns, and (e) 0–2 ns, where zero time is at the peak of the excitation pulse.
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