Figure 3 | Scientific Reports

Figure 3

From: Hybrid coordination-network-engineering for bridging cascaded channels to activate long persistent phosphorescence in the second biological window

Figure 3

(a) Static photoluminescence spectrum under excitation at 750 nm and the corresponding photoluminescence excitation spectrum monitored at 1064 nm of CGO-0.5Nd phosphor; (b) Thermoluminescence curves of 0.5%Cr-doped ZnGa2O4 and CaGa2O4 phosphors measured 30 s after irradiation ceased; (c) Photoluminescence spectrum under excitation at 410 nm and photoluminescence excitation spectrum monitored at 1064 nm of CGO-0.5Cr0.5Nd phosphor; (d) Schematic illustration showing the energy-level diagram of Cr3+ and Nd3+ in CaGa2O4 phosphors; (e) XRD patterns for CaGa2O4: xNd (x = 0.5%, 5% and 10%) phosphors; (f) 71Ga NMR spectra of CaGa2O4: xNd (x = 0, 0.5% and 5%) samples.

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