Synthesis and photoluminescence of a full-color emitting phosphor Gd2MoB2O9:Eu3+, Tb3+ for white light LEDs

The Eu3+and Tb3+co-doped barium magnesium silicate Gd2MoB2O9 phosphors, which can emit a full-colour light, were synthesized by high temperature solid state reaction, and their luminescence characteristics were investigated. The Gd2MoB2O9:Eu3+, Tb3+ emitted an intensive white light emission under excitation at 375 nm at room temperature. The spectra measurement show that the phosphors Gd2MoB2O9:Eu3+, Tb3+ emit three colours light peaked at 486, 543 and 613 nm, which were better suitable wavelength for composing white light. The excitation spectra having higher absorption between 250 and 400 nm, match with the UV-LED chips for white light emitting diode(w-LED).