Abstract
The present work reports the optical characterization of 1 mol% Eu2O3 + 5TiO2 + 15BaO + 30PbO + 49P2O5 glass. The structural and spectroscopic properties of the glass have been explored by XRD, FTIR, optical absorption, excitation, luminescence emission, decay profile and CIE diagram. The emission spectra show seven bands and the most intense peak is found at 613 nm as a consequence of 5D0 → 7F2 red emission transition. The luminescence intensity ratio (R) and Judd–Ofelt (JO) parameters (Ωλ) are estimated from the emission spectra and also used to identify the type of bonding and symmetry around the Eu3+ ions. The spontaneous emission transition probability (AR), branching ratio (βR), stimulated emission cross-section (σe) and decay lifetime (τR) of the excited state are calculated using JO parameters. The fluorescence decay profile for the 5D0 level of Eu3+ ions shows single exponential behavior. The CIE 1931 diagram reveals strong red emission with correlated color temperature (CCT) 1803 K and red color purity 91.42 % under 393 nm excitation. It indicates that the present glass could be suitable for red laser application at 613 nm.
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