Study on Luminescence Properties and Crystal-Lattice Environment of Eu²⁺ in Sr_4-xMg_x Si₃O₈Cl₄∶Eu²⁺ Phosphor

【Abstract】 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, Sr_{4- 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 Sr_{4- 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.更多还原