Preparation of Red-Emitting Eu2+-Doped Barium Calcium Silicon Oxynitride by Solid-State Reaction and its Luminescence Properties

Hiroya Morishita; Anne C.A. Delsing; Hubertus T. Hintzen; Hideki Kuwahara; Kiyoshi Itatani

doi:10.4028/www.scientific.net/KEM.617.149

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 617Preparation of Red-Emitting Eu2+-Doped Barium...

Preparation of Red-Emitting Eu²⁺-Doped Barium Calcium Silicon Oxynitride by Solid-State Reaction and its Luminescence Properties

Abstract:

The luminescence properties of Eu²⁺-doped barium calcium silicon oxynitrides (general formula: Ba_4-_xCa_xSi₆ON₁₀: Eu²⁺(x = 1.8 ~ 2.2)) were examined, together with the preparation conditions for the solid state reaction. Firstly, the stoichiometric amounts of Ba, Ca₃N₂, SiO₂ and Si₃N₄were mixed with Eu₂O₃(activator; the molar ratios of Eu to (Ca + Ba + Eu) (= m; 0.05 to 1.0)) for the preparation of Ba_1.8Ca_2.2Si₆ON₁₀: Eu²⁺, Ba_2.0Ca_2.0Si₆ON₁₀: Eu²⁺and Ba_2.2Ca_1.8Si₆ON₁₀: Eu²⁺, and then the mixtures were heated at a temperature between 1300 and 1550°C for 10 h in N₂atmosphere. The single phase compounds, which were prepared by the heating at and above 1350°C, emitted the red color light whose wavelength could be changed from 638 to 653 nm with increasing m value from 0.05 to 1.00, due to the excitation at the wavelength of 528 nm.

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Periodical:

Key Engineering Materials (Volume 617)

Pages:

149-152

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.617.149

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Online since:

June 2014

Authors:

Hiroya Morishita*, Anne C.A. Delsing, Hubertus T. Hintzen, Hideki Kuwahara, Kiyoshi Itatani

Keywords:

Barium Calcium Silicon Oxynitride, Luminescence, Red Color Light Emission

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