Fig. 1. Emission spectra of different GxSnO samples. (a) Transmission spectra; (b) excitation spectra; (c) spectra obtained by 312 nm UV excitation; (d) emission spectra obtained by X-ray irradiation

Fig. 2. Decay curve of the G1SnO sample

Fig. 3. Emission spectra of different samples. (a) XRD; (b) transmission spectra; (c) excitation spectra; (d) emission spectra of 312 nm UV light

Fig. 4. XEL spectra of different samples

Fig. 5. XEL and transmission spectra under different X-ray power irradiation. (a) XEL spectra of G1SnO400 sample; (b) transmission spectra before and after X-ray irradiation and after repaired

Fig. 6. Spectra of G1SnO400 samples at different temperatures. (a) Variable temperature spectra; (b) temperature-dependent integrated intensity