The basic features of trivalent Cr3+, Eu3+ and Dy3+ in a large number of crystalline and amorphous host matrices are so well established that these transition metal and rare earth ions are extensively used as a spectroscopic probe for studying the structures and the local symmetry of the solid-state materials. In this work, the compositional-dependent lead borate glasses doped with transition metal (Cr3+) and rare earth (Eu3+, Dy3+) ions were examined. It is interesting to see how local symmetry of the optically ∗ Corresponding author.
E-mail address: Wojciech.Pisarski@us.edu.pl (W.A. Pisarski).active ions start to change with PbO/B2O3 ratios. For that reason, the optically active ions were limited in our work to Cr3+, Eu3+ and Dy3+ ions known in the literature as structural probes. Previously, lead borate glasses doped with Cr3+ were investigated using absorption spectroscopy before and after gamma irradiation [3], but luminescent properties have not been yet examined, to our knowledge. In
contrast to Cr3+, luminescence of Eu3+ [7] and Dy3+ [8] ions in lead borate glass was detected and compared to the other glass systems. This work presents some correlations between glass composition
(change of PbO/B2O3 ratio) and spectral characteristics of transition
metal and rare earth ions. The spectral line analysis for Cr3+,
Eu3+ and Dy3+ was performed with increasing of heavy metal oxide
(PbO) content. The absorption and luminescence spectra were analyzed
for glass samples, where PbO:B2O3 ratio varies from 1:1 to
4:1.