Abstract
Structural behavior and luminescence properties of rare earth ions (Pr 3+ , Eu 3+ , Er 3+ ) in oxide and oxyfluoride lead borate glasses have been studied using X-ray diffraction and spectroscopic methods. Substitution of PbO by PbF 2 results in decreasing of the number of tetrahedral BO 4 units, which was observed for Pr 3+ and Eu 3+ ions in lead borate glasses using infrared spectroscopy. In contrast to oxyfluoride lead borate glasses, several diffraction lines due to crystalline ErBO 3 phase were identified for Er-doped oxide sample. Luminescence spectra for rare earth ions in lead borate based glasses have been analyzed, where PbO was totally substituted by PbF 2 .
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