Study on Luminescence Properties and Crystal-Lattice Environment of Eu^(2+) in Sr_(4-x)Mg_x Si_3O_8Cl_4∶Eu^(2+) Phosphor

摘要

According to the Van Uitert experimental equation, crystal-lattice environment of Eu2+ in the Sr4Si3O8Cl4 crystal was discussed. By adding Mg2+ to the host lattice, Sr4- x Mg x Si3O8Cl4∶Eu2+ was synthesized and the emission peak shifted from blue-green （488 nm） to blue-violet （411 nm） with the increase of amount of the magnesium which replaced the strontium. By analyzing the spectra of Sr4- x Mg x Si3O8Cl4∶Eu2+ the two Eu2+ emission centers were found because of the change of crystal-lattice environment in the host and the crystal structure was obtained by X-ray diffraction data.