Spectroscopic investigations on alkali earth bismuth borate glasses doped with CuO

Transparent glasses of the composition 10RO.20Bi2O3.(70 − x) B2O3.xCuO [R = Ca, Ba] with x = 0, 0.4, 0.8 (wt.%) were prepared via melt-quenching technique and characterized using X-ray powder diffraction. Spectroscopic measurements, viz., optical absorption, EPR, FTIR and photoluminescence (PL) were studied at room temperature. Analysis of the present investigations indicates that the concentration of luminescence centers of bismuth ions (Bi2+ ions in visible region) decreased by the integration of BaO and also by increasing dopent concentration. It is also observed that addition of CuO decreases stability of the glass network in calcium series and strengthens in barium series.

Research HighlightsSpectroscopic studies have been carried out to examine the effect of modifier oxide (CaO, BaO) on bismuth borate glass with increasing CuO concentration. From the analysis of the results it has been concluded as follows:
► Addition of CuO weakens the glass network of CaO series and strengthens BaO series.
► Ba2+ ions effectively modify the glass network than Ca2+ ions.
► CuO addition affects the formation of bismuth radicals in both the host glasses.
► Present paper emphases the structural analysis of RBiBCuO (R=Ca, Ba) glasses.