Luminescent properties of BaAl2Si2O8:Eu2+, Mn2+ phosphor for white LED

Changyu Shen; Ke Li

doi:10.1117/12.865931

22 October 2010 Luminescent properties of BaAl₂Si₂O₈:Eu²⁺, Mn²⁺ phosphor for white LED

Changyu Shen, Ke Li

Proceedings Volume 7658, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Detector, Imager, Display, and Energy Conversion Technology; 76581J (2010) https://doi.org/10.1117/12.865931
Event: 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2010, Dalian, China

Abstract

BaAl₂Si₂O₈:xEu²⁺, yMn²⁺ was prepared by high-temperature solid state reaction and X-ray powder diffraction analysis confirmed the formation of it. It was found experimentally that, its emission peaks situated at 420 nm and 570 nm respectively under excitation of 380 nm irradiation. The emission peaks at 420 nm originate from the transition 5d to 4f of Eu²⁺ ions that occupy the Ba²⁺ sites in the crystal of BaAl₂Si₂O₈, while the 580nm emission is attributed to the energy transfer from Eu²⁺ ions to Mn²⁺ ions. The white light can be obtained by combining the 380 nm chip with the phosphor. When the concentrations of the Eu²⁺ ions and Mn²⁺ ions were 0.05 mol and 0.35 mol respectively, the sample presented intense white emitting. The near-ultraviolet InGaN-based BaAl₂Si₂O₈:0.05Eu²⁺, 0.35Mn²⁺ LED achieves good color rendering of 85 with the CIE coordinate of (0.3183, 0.3036).

Citation Download Citation

Changyu Shen and Ke Li "Luminescent properties of BaAl₂Si₂O₈:Eu²⁺, Mn²⁺ phosphor for white LED", Proc. SPIE 7658, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Detector, Imager, Display, and Energy Conversion Technology, 76581J (22 October 2010); https://doi.org/10.1117/12.865931

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