Yellow-Emitting Y3Si6N11: Ce3+ Phosphors for White Light–Emitting Diodes (LEDs)

Authors

  • Lihong Liu,

    1. Structural and Functional Integration of Ceramics Group, The Division of Functional Materials and Nanodevices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, China
    2. Sialon Group, Sialon Unit, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
    3. Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials and Metallurgy, Northeastern University, Shenyang, Liaoning, China
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  • Rong-Jun Xie,

    Corresponding author
    1. Sialon Group, Sialon Unit, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
    • Structural and Functional Integration of Ceramics Group, The Division of Functional Materials and Nanodevices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, China
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  • Wanyuan Li,

    1. Structural and Functional Integration of Ceramics Group, The Division of Functional Materials and Nanodevices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, China
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  • Naoto Hirosaki,

    1. Sialon Group, Sialon Unit, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
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  • Yoshinobu Yamamoto,

    1. Sialon Group, Sialon Unit, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
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  • Xudong Sun

    1. Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials and Metallurgy, Northeastern University, Shenyang, Liaoning, China
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Author to whom correspondence should be addressed. e-mail: XIE.Rong-Jun@nims.go.jp

Abstract

A novel Y3−xSi6N11: xCe3+ yellow phosphor was synthesized using the carbothermal reduction and nitridition method at 1550°C for 16 h in this letter. Photoluminescence spectra indicated that the phosphor showed broad excitation spectrum and had strong absorption in range of 350–450 nm. It also gave a broad emission band (Full width at half maximum = 153 nm) centered at 575 nm under 425-nm excitation. With increasing Ce3+ concentration, the strongest emission intensity was obtained at 5 mol% Ce3+ doping amount and a systematic redshift was observed as the Ce3+ concentration increased. The results indicate that this novel yellow phosphor is a promising candidate for using in blue-chip-excited white light–emitting diodes (LEDs).

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