Silica glasses co-doped with rare earth ion (Tb³⁺), b-diketone and synergic agents were prepared by in situ sol-gel method. The emission and IR spectra, XRD, SEM and TG-DSC measurements were performed. Various in-situ complexes and heat-treatment on the photoluminescence properties of rare earth organic complex in silica glass were also investigated. The results indicated that when appropriate kinds of b-diketone compounds whose energy levels were matched with those of Tb^3＋ ions were added, the luminescence intensity of the Tb^3＋ ion was improved. Appropriate kinds of synergic agents could also enhance the luminescence intensity to some degree. The results can provide certain basis to manufacture high luminescence silica gel glasses containing terbium ion in the future.

Key words: β-diketone, synergic agent, sol-gel method, in situ synthesis, luminescence spectrum