Luminescence properties of Eu2+-activated Ca_0.13Sr_0.87Al₂Si₂O₈: A bluish green phosphor for solid state lighting

摘要

Eu2+ activated phosphors with the composition of Ca₀₁₃Sr_0.87Al₂Si₂O₈ were synthesized by combustion technique. The luminescent properties of these phosphors have been explored by analyzing their excitation and emission spectra with the help of photoluminescence (PL) spectroscopy. The phase-forming processes and presence of associated mode of vibrations of the phosphors were studied by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) respectively. Under ultra-violet (UV) excitation, Ca₀₁₃Sr_0.87Al₂Si₂O₈ phosphors had broad emission spectrum between 418 and 550 nm in the blue-green region of spectra corresponding to 4f65d→4f7 transition of Eu2+ ion. The results show Ca₀₁₃Sr_0.87Al₂Si₂O₈: Eu2+ is a promising host candidate for the phosphors and can be used for improving the efficiency and quality of phosphor-converted white light-emitting diodes.