Eu

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概要

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• Ca<inf>1-x</inf>Sr<inf>1-x</inf>Eu<inf>2x</inf>SiO<inf>4</inf>(CaSrSiO<inf>4</inf>:Eu²⁺) phosphors were prepared by a novel aqueous solution technique using propylene glycol-modified silane (PGMS), combined with a freeze-drying process. The precursors were heat-treated under a reducing atmosphere with BaCl<inf>2</inf>flux. X-ray diffraction indicated that the obtained phosphors exhibited an \alpha'-CaSrSiO<inf>4</inf>structure. The wavelength at the phosphors' maximum emission was systematically shifted beyond 600 nm as the Eu²⁺concentration was increased. The corresponding excitation spectra were extended to the visible light region (400--500 nm) with increasing Eu²⁺concentration. These results implied that CaSrSiO<inf>4</inf>:Eu²⁺is a red-emitting phosphor excited by near-UV and blue-light-emitting diodes.

• 2013-07-25

著者

• Kakihana Masato

  Institute Of Multidisciplinary Research For Advanced Materials Tohoku University

• KATO Hideki

  Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

• TEZUKA Satoko

  Institute for Marine Resources and Environment, National Institute of Advanced Industrial Science an

• Komukai Tetsufumi

  Ichikawa Research Laboratory, Sumitomo Metal Mining Co., Ltd., Ichikawa, Chiba 202-8588, Japan

• Tezuka Satoko

  Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan

• Sato Yasushi

  Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan

• Takatsuka Yuji

  Ichikawa Research Laboratory, Sumitomo Metal Mining Co., Ltd., Ichikawa, Chiba 202-8588, Japan

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• Eu
• Eu²⁺-Activated CaSrSiO₄ : a New Red-Emitting Oxide Phosphor for White-Light-Emitting Diodes

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