Effect of LiCl on the Microstructure and Luminescence Properties of YVO_4:Eu^3+ and YBO_3:Eu^3+ Phosphors

In this investigation, Eu^3+ doped Yttrium Orthovanadate (YVO_4)/Yttrium Borate (YBO_3) phosphors were synthesized individually by conventional solid state method at 1100°C under atmospheric condition. Meanwhile, different amounts of lithium chlorides (LiCl) were used as the flux compound to modify the morphology of the phosphor particles and also final luminescence properties. It was concluded that even small amounts of fluxes play a vital role in the growth of particles. The photoluminescence emission spectra of the phosphors were measured at λ_exc= 240 and 310 nm, respectively. It was found that by using 2wt% of flux compounds, the emission intensities of YVO_4:Eu^3+ and YBO_3:Eu^3+ phosphors became respectively 6.8 and 1.3 times larger than those of phosphors without any flux addition.