Author(s)

Jihae Kim, Hideki Kato, Makoto Kobayashi, Yasushi Sato, Masato Kakihana

Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, Japan.

Synthesis of oxynitride solid solutions CaAl_4-xSi_xO_7-xN_x:Eu²⁺ (x = 0 - 4) was attempted by the solid state reaction (SSR) methods using Si₃N₄ and AlN as nitrogen sources. The Ca₃Al₈Si₄O₁₇N₄ (x = 4/3) sample with the high phase purity was obtained when AlN was used as a nitrogen source whereas the sample synthesized using Si₃N₄ as another nitrogen source contained a Ca₂Al₂SiO₇ impurity. Thus, it was revealed that AlN was a preferable nitrogen source for the synthesis of Ca₃Al₈Si₄O₁₇N₄ by the SSR method. The solid solutions around x = 4/3 activated with Eu²⁺ exhibited bluish-green luminescence with emission maxima at 480 nm by the excitation at 250 - 450 nm. Thus, the CaAl_4-xSi_xO_7-xN_x: Eu²⁺ solid solutions especially for Ca₃Al₈Si₄O₁₇N₄:Eu²⁺ (x = 4/3) were developed as novel Eu²⁺

Oxynitride Phosphor; Eu²⁺ Activator; Ca₃Al₈Si₄O₁₇N₄:Eu²⁺; Solid Solution

J. Kim, H. Kato, M. Kobayashi, Y. Sato and M. Kakihana, "Synthesis of a Novel Bluish-Green Emitting Oxynitride Ca₃Al₈Si₄O₁₇N₄:Eu²⁺ Phosphor in a CaAl_4-xSi_xO_7-xN_x Solid Solution System," Optics and Photonics Journal, Vol. 3 No. 6A, 2013, pp. 29-33. doi: 10.4236/opj.2013.36A006.