Preparation and luminescence characteristics of Sr3SiO5：Eu^2＋ phosphor for white LED

The Sr3SiO5：Eu^2＋ phosphor was synthesized by high temperature solid-state reaction. The emission spectrum of Sr3SiO5：Eu^2＋ shows two bands centered at 487 and 575 nm, which well agree with the theoretic values of emission spectrum. The excitation spectrum for 575 nm emission center has several excitation bands at 365, 418, 458 and 473 nm. And the results show that the emission spectrum of Sr3SiO5：Eu^2＋ is influenced by the Eu^2＋ concentration. The relative emission spectra of the white-emitting InGaN-based YAG：Ce^3＋ LED and Sr3SiO5：Eu^2＋ LED were investigated. The results show that the color development of InGaN-based Sr3SiO5：Eu^2＋ is better than that of InGaN-based YAG：Ce^3＋, and the CIE chromaticity of InGaN-based Sr3SiO5：Eu^2＋ is （x=0.348, y=0.326）.

Preparation and luminescence characteristics of Sr3SiO5:Eu2+ phosphor for white LED

The Sr₃SiO₅:Eu²⁺ phosphor was synthesized by high temperature solid-state reaction. The emission spectrum of Sr₃SiO₅:Eu²⁺ shows two bands centered at 487 and 575 nm, which well agree with the theoretic values of emission spectrum. The excitation spectrum for 575 nm emission center has several excitation bands at 365, 418, 458 and 473 nm. And the results show that the emission spectrum of Sr₃SiO₅:Eu²⁺ is influenced by the Eu²⁺ concentration. The relative emission spectra of the white-emitting InGaN-based YAG:Ce³⁺ LED and Sr₃SiO₅:Eu²⁺ LED were investigated. The results show that the color development of InGaN-based Sr₃SiO₅:Eu²⁺ is better than that of InGaN-based YAG:Ce³⁺, and the CIE chromaticity of InGaN-based Sr₃SiO₅:Eu²⁺ is (x=0.348, y=0.326). Supported by Hebei Provincial Technology Development Foundation (Grant No. 51215103b)