Structural and optical studies of rare earth-free bismuth silicate glasses for white light generation
作者： M. Laya Krishnan , M.M. Neethish , V.V. Ravi Kanth Kumar
DOI: 10.1016/J.JLUMIN.2018.05.023
关键词:
摘要: Abstract We report here rare-earth free bismuth silicate based oxyfluoride glasses (70-x) Bi2O3 30SiO2 xMF (where M = Li, Na & K) with x = 5, 20 30 mol% that realizes white light. Bismuth are prepared by melt quenching method and characterized Raman, Fourier transform infrared (FTIR), UV‐VIS absorption emission techniques. From the structural analysis, Raman FTIR, we able to find presence of BiO6 unit in samples. Optical band gap values present glass systems obtained from spectra vary 2.91 eV 3.21 eV. shows a correlation theoretically calculated optical basicity values. Urbach energy gives measure disorder system. Quantitative description Bi3+ ion interaction host lattice has been explored through Huang Rhys factor(S). The quality light is evaluated CIE color matching function, purity (CP) correlated temperature (CCT).
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