Fig. 5
From: Photoluminescence study of optical transitions in spinel zinc gallium oxide thin films

Temperature-dependent PL spectra under 193Â nm excitation with Zn composition of (a) 0.0 at%, (b) 0.9 at%, (c) 3.4 at%, (d) 7.3 at%, (e) 16.5 at%, (f) 33.1 at%, (g) 43.9 at%, (h) 45.2 at%, (i) 48.0 at%. The inserted graph shows the integrated PL peak area as a function of temperature.