Fig. 11From: Controlled Hydrothermal Synthesis and Photoluminescence of Nanocrystalline ZnGa2O4:Cr3+ MonospheresPhotoluminescence excitation (lines E1 and E2) and emission (lines L1 and L2) spectra (a) and fluorescence decay kinetics (b) for the as-synthesized 18 h sample (lines E1, L1, and D1) and that calcination at 800 °C for 2 h (lines E2, L2, and D2)Back to article page