Study on Luminescence Properties and Crystal-Lattice Environment of Eu~(2+) in Sr_(4-x)Mg_xSi_3O_8Cl_4: Eu~(2+) Phosphor

摘要

According to the Van Uitert experimental equation, crystal-lattice environment of Eu~(2+) in the Sr_4Si_3O_8Cl_4 crystal was discussed. By adding Mg~(2+) to the host lattice, Sr_(4-x)Mg_xSi_3O_8Cl_4: Eu~(2+) 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 Sr_(4-x)Mg_xSi_3O_8Cl_4: Eu~(3+) the two Eu~(2+) 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.