Chemical Materials and SynthesisNo Access

PREPARATION AND LUMINESCENCE PROPERTIES OF Eu²⁺-ACTIVATED Ba-Si_x-O-N PHOSPHORS

Department of Chemical Science and Technology, Graduate School of Advanced Technology and Science, The University of Tokushima, 2-1 Minami-Josanjima, Tokushima 770-8506, Japan

State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Shaanxi, 710049, China

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MANAKA NUMATA

Department of Chemical Science and Technology, Graduate School of Advanced Technology and Science, The University of Tokushima, 2-1 Minami-Josanjima, Tokushima 770-8506, Japan

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TOMONORI MAEDA

Department of Chemical Science and Technology, Graduate School of Advanced Technology and Science, The University of Tokushima, 2-1 Minami-Josanjima, Tokushima 770-8506, Japan

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YUJI AKAZAWA

Department of Chemical Science and Technology, Graduate School of Advanced Technology and Science, The University of Tokushima, 2-1 Minami-Josanjima, Tokushima 770-8506, Japan

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KEI-ICHIRO MURAI

Department of Chemical Science and Technology, Graduate School of Advanced Technology and Science, The University of Tokushima, 2-1 Minami-Josanjima, Tokushima 770-8506, Japan

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TOSHIHIRO MORIGA

Department of Chemical Science and Technology, Graduate School of Advanced Technology and Science, The University of Tokushima, 2-1 Minami-Josanjima, Tokushima 770-8506, Japan

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https://doi.org/10.1142/S0217979210066355Cited by:8 (Source: Crossref)

Abstract

A series of oxonitridosilicates phosphors Ba-Si_x-O-N /Eu²⁺ (x=Si/Ba=1~8, 5atom% Eu²⁺) were synthesized using traditional solid-state reaction. For x = 2~8, the main phase of the obtained samples was Ba₃Si₆O₁₂N₂. All Ba-Si_x-O-N /Eu²⁺(x = 1~8) materials could be efficiently excited in the UV to visible region(310~450nm) and had a green emission at 508~522nm, making them attractive as conversion phosphors for white LED applications. With increasing x values, the emission peaks shifted to the longer wavelength region, while the emission intensity had a maximum at x = 6. The influence of the firing times was also discussed, after twice fired, there was a tendency of single-phased formed of the obtained materials and the emission intensity was greatly improved.

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