Blue-excited luminescence of Eu-doped strontium boroaluminate glasses

We report on a blue-excited luminescence phenomenon in Eu2+-doped strontium boroaluminate glasses in this paper. The emission wavelengths strongly depend on the B2O3 content in the glasses, changing hue from green to yellow. The excitation spectra exhibit a peculiar blue excitation window that the excitation at UV band is strongly depressed and at blue band is enhanced correspondingly. The low emission quantum efficiency in the glasses can be significantly improved by forming a strontium boroaluminate glass-ceramics, accompanying with the window disappearance.