Spectroscopic properties of Eu³⁺ doped lithium fluro-borate glasses for LEDs applications

A series of lithium fluro-borate glasses with different Eu³⁺ contents were prepared by melt quenching technique to explore the new material for solid state light emitting diode applications. For the prepared glasses the luminescence behavior and life time measurements were investigated through fluorescence emission spectroscopy at room temperature. Under an excitation 393nm the photoluminescence (PL) spectra exhibits four emission peaks around at 590,615,654 and 700nm assigned to ⁵D₀→⁷F₁, ⁵D₀→⁷F₂, ⁵D₀→⁷F₃ and ⁵D₀→⁷F₁ transitions respectively. And also Lasing properties of the glasses like total radiative life time, From the measured values of emission, life times, strong photoluminescence features, and CIE chromaticity coordinates, 0.5 mol% of Eu³⁺ ions doped ZMLB glasses showed optimum performance and are potential candidate for red light generation at 620 nm with the excitation of 393nm. (author)