Spectroscopic and energy transfer behavior of Dy3+ ions in B2O3TeO2PbOPbF2Bi2O3CdO glasses for laser and WLED applications

摘要: Abstract A new series of white light emitting Dy3+ doped Lead tellurofluoroborate glasses have been prepared and their spectroscopic energy transfer behavior were explored through analyzing XRD, FTIR, Raman, SEM, EDAX, optical absorption, photoluminescence lifetime measurements. The fundamental stretching the various borate tellurite networks identified using FTIR Raman spectral analysis. bonding parameter studies reveal ionic nature Dy O bond in present glasses. Judd–Ofelt (JO) intensity parameters determined from absorption spectra used to investigate symmetry orientation Dy–ligand field environment. luminescence increases with increasing ion concentration up 0.5 wt%, beyond that quenching is observed. JO determine transition probability (A), stimulated emission cross-section ( σ P E ), radiative τ R ) branching ratios β for different transitions 4F9/2 excited level. higher values 4F9/2 → 6H15/2 4F9/2 → 6H13/2 suggest possible laser action visible region. Y/B ratio, CIE chromaticity color coordinates (x, y) Color correlated temperature (CCT) also estimated as well pumping wavelengths. x, y fall within region can be tuned by varying excitation state measured found decrease content. non-exponential predominant content due efficient between ions. decay curves fitted Inokuti–Hirayama (IH) model understand transfer. Among glasses, 0.5DPTFB glass possesses , η suggested lasers WLED applications.