Synthesis and Luminescence Property of Sr_3Al_3O_6:Eu~(3+) Red Phosph or Prepared by Co-precipitation Technique

摘要

Sr_3Al_2O_6:Eu~(3+) red phosphor was synthesized by co-precipitation and investigated their crystal structures and luminescent properties in detail. EuCl_3. was used as rare earth sources to replace Eu_2O_3, which saving cost significantly. X-ray diffraction(XRD) and scanning electron microscopy (SEM) result indicated that the as-prepared phosphors was calcined at 1150 oC for 2h crystalized in cubic phase with space group of Pa-3 and uniform morphology. The average diameter of the phosphors were 1.8um. Excitation spectrum and emission spectrum results shows when Boric acid was added 3wt% and Eu3+ was added x=0.04((Srl-xEux)3Al_2O_6), the red emission of Eu3+ centers was shown at peak of 61 lnm under near ultraviolet excitation with wavelength of 393nm. The emission spectrum was line spectrum. Luminous intensity achieved the optimum. The thermal quenching experiments indicated that it had thermal stability in the temperature of 20 oC -80 oC.