Eu₂O₃ doped bright orange-red luminescent lithium alumino-borate glasses for solid state lighting

In present study, Eu₂O₃ doped Li₂O:Al₂O₃:B₂O₃ glasses (LABE) were synthesized by melt quenching technique. Physical, thermal, structural and spectroscopic properties of prepared glasses have been investigated by various techniques. X-ray Diffraction (XRD) spectroscopy confirms the amorphous nature of glass samples. FTIR spectra show various structural groups present in the present glass system. Luminescence spectra exhibit emission bands in the visible region from 570 to 725 nm. The emission peaks are located at 577.5, 589.5, 613.5, 652, 701 nm attributed to the ⁵D₀→⁷F_{0, 1, 2, 3 and 4} transitions. The CIE chromaticity diagram discloses glass LABE-4 having colour coordinates x = 0.63, y = 0.34 shows highest emission intensity among all glass samples. The glass LABE-4 lying in the red region of CIE 1931 chromaticity diagram and has been found well suited for solid-state lighting application.