Synthesis and Luminescent Properties of Eu~(3+) Doped Strontium Borate Phosphors

Eu3+ doped borate phosphors (SrB4O7, SrB2O4, Sr2B2O5, Sr3B2O6) were prepared by solid state reaction and sol-gel technique, respectively. The luminescent results showed that the four kinds of phosphors have different luminescent properties. The Sr2B2O5:Eu3+, Sr3B2O7:Eu3+ phosphors have the red emission at 610nm, the SrB2O4:Eu3+ phosphor has the orange emission at 593nm, however the SrB4O7:Eu3+ phosphor displays the emission peaks of Eu2+ ion, all that result from the different Eu-O coordination environment. The optimal doping concentration of phosphors is 2%.