Emission enhancement of Sr3YP3O12:R (R = Dy3+ and Eu3+) phosphors for light-emitting diodes by adding H3BO3 flux

Sr3YP3O12:R (R = Dy3+ and Eu3+) phosphor is synthesized by high temperature solid-state reaction method in air. The crystal structure and luminescence properties are investigated. Sr3YP3O12:Dy3+ phosphor with excitation at 350 nm emits yellow light in the range of 450-780 nm. Sr3YP3O12:Eu3+ phosphor with excitation at 394 nm shows red emission in the range of 550-760 nm. The emission intensity of Sr3YP3O12:R (R = Dy3+ and Eu3+) phosphor is enhanced ∼1.5 and 1.8 times, respectively, when H3BO3 as flux is added. The luminous mechanisms of Sr3YP3O12:R (R = Dy3+ and Eu3+) phosphor are explained by energy level scheme of Dy3+ and Eu3+ ion. The experimental results are beneficial to improve the luminescence property of other phosphors.