Synthesis and luminous characteristics of Ba2SiO3Cl2:Eu2+, Mn2+ phosphor for white LED

Changyu Shen; Yi Yang; Shangzhong Jin

doi:10.1117/12.754905

11 January 2008 Synthesis and luminous characteristics of Ba₂SiO₃Cl₂:Eu²⁺, Mn²⁺ phosphor for white LED

Changyu Shen, Yi Yang, Shangzhong Jin

Proceedings Volume 6828, Light-Emitting Diode Materials and Devices II; 682815 (2008) https://doi.org/10.1117/12.754905
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

Ba₂SiO₃Cl₂:Eu²⁺, Mn²⁺ phosphor was synthesized by high-temperature solid state reaction at 900~1200°C in a slightly reducing atmosphere for 2.0~8.0 hours. The raw materials were the mixture of BaCO₃, SiO₂, MnCO₃, NH₄Cl, and Eu₂O₃ in the mol ratio of 3, 2, 0.004, 2 and 0.02. Ba₂SiO₃Cl₂:Eu²⁺, Mn²⁺ phosphor's absorption and luminescence spectra were studied. The results indicated that the emission band consists of three peaks located at 425 nm, 492nm and 608nm, respectively. The emission peaks at 425 and 492nm originate from the transition 5d→4f of Eu²⁺ ions that occupy the two Ba²⁺ sites in the crystal of Ba₂SiO₃Cl₂, while the 608nm emission is attributed to the energy transfer from Eu2+ ions to Mn²⁺ ions. The white light can be obtained by mixing the three emission colors of blue (425 nm), green (492 nm) and red-orange (608 nm) in the single host. When the concentrations of the Eu²⁺ ions and Mn²⁺ ions were 0.02mol and 0.004mol respectively, the sample presented intense white emitting. The excitation spectra of the three emissions extending from 300 nm to 460 nm indicated that Ba₂SiO₃Cl₂:Eu²⁺ phosphor can be excitated by InGaN chip UV emission effectively, and it is a single-phase white phosphor with low-cost and high brightness for white LEDs.

Citation Download Citation

Changyu Shen, Yi Yang, and Shangzhong Jin "Synthesis and luminous characteristics of Ba₂SiO₃Cl₂:Eu²⁺, Mn²⁺ phosphor for white LED", Proc. SPIE 6828, Light-Emitting Diode Materials and Devices II, 682815 (11 January 2008); https://doi.org/10.1117/12.754905

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