Abstract
A series of Er3+ ions doped lithium lead alumino borate (LiPbAlB) glasses were synthesized via melt quench method and their structural, physical and optical properties were studied. Judd-Ofelt theory in correlation with the emission and absorption profiles was performed for the measurement of various radiative parameters for different transitions of Er3+ doped glasses. The as-prepared glasses show deep green (550 nm) as well as NIR (1532 nm) emission at 380 and 980 nm excitation wavelengths, respectively. The intensity of emission spectra increases with Er3+ ions concentration up to 1.5 mol% and beyond quenching is observed. The Dexter theory applied to the emission profiles reveals the interaction between Er3+ ions as dipole-dipole in nature. CIE color coordinates are found to fall in the green region of the visible spectrum. It is observed that 1.5 mol% of Er3+ ions concentration is optimum to exhibit the maximum quantum efficiency, branching ratios, gain bandwidth, emission cross-section, gain cross-section and aptly suitable for visible and NIR photonic applications.
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