Figure 3
From: Tunability Limit of Photoluminescence in Colloidal Silicon Nanocrystals

Nanosecond transient PL, (a,c) and (e) PL spectra-time contour; (b,d) and (f) PL spectra at time of zero and 30 ns for Si NCs of 2.5, 3.8 and 6.2 nm diameter.
From: Tunability Limit of Photoluminescence in Colloidal Silicon Nanocrystals
Nanosecond transient PL, (a,c) and (e) PL spectra-time contour; (b,d) and (f) PL spectra at time of zero and 30 ns for Si NCs of 2.5, 3.8 and 6.2 nm diameter.