Luminescent Properties of SrGeO3:Eu3+Red Emitting Phosphors for Field Emission Displays

A novel red emitting phosphor of Eu 3+ doped SrGeO 3 was prepared through the solid state reaction. XRD, PL and CL were utilized to characterize the samples. Under the excitation of ultraviolet light and low voltage electron beams, SrGeO 3 : Eu 3+ phosphor shows the characteristic 5 D 0 - 7 F 2 transition of Eu 3+ at around 617 nm. The concentration for optimum luminescence intensity of Eu 3+ was determined to be 0.04 in SrGeO 3 : x Eu 3+ phosphor. The luminescent intensity could be improved by co-doping with the charge compensators of R + (Na, K) and Ga 3+ which partially substitute for Sr 2+ and Ge 4+ crystal sites, respectively. CL spectra show that Eu 3+ ions could be excited by the plasma produced by the incident electrons, furthermore, the CL properties of SrGeO 3 : Eu 3+ as a function of accelerating voltage and probe current were investigated. The results indicate that SrGeO 3 : Eu 3+ can be a suitable red-emitting phosphor candidate for FEDs.