Low-temperature luminescence of LiB3O5: Ag glass excited by synchrotron radiation

The paper presents the results of studies of photoluminescence (PL) of LiB3O5:Ag glass at a temperature of 12.6 K under the influence of synchrotron radiation λexc = 45 nm. It was found that the obtained PL spectra consist of three bands λmon = 278, 336, and 379 nm. Studies of the excitation spectra by scanning with the registration of luminescent radiation at λmon = 280, 330, and 390 nm revealed four bands for each λmon. It is proposed that the main band at 278 nm in the excitation spectra is associated with centers based on Ag+ ions that occupy the Li+ sites in the glass structure, while the other two bands at 336 and 379 nm are associated with centers based on Ag2+ and Ag3+ conglomerates. B3+ – O– centers based on structural defects in boron oxide complexes may be responsible for the weak 110 nm excitation band.