Synthesis and luminescence of Sr₂CeO₄ superfine particles by citrate-gel method

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• 作者：Yu ; Xibin ; He ; XiangHong ; Yang ; ShiPing ; Yang ; Xiaofei ; Xu ; Xialin
• 关键词：Sr₂CeO₄ ; Citrate-gel method ; Phosphor ; Charge-transfer
• 刊名：Materials Letters
• 出版年：2004
• 期刊代码：59_0167577x
• 类别：ms
• 出版时间：January, 2004
• 卷：58
• 期：1-2
• 页码：48-50
• 文件大小：137 K

摘要

A strong blue-white emission phosphor Sr₂CeO₄ superfine particles, containing SrCe₄O₇, have been synthesized using a citrate-gel method. The crystalline phase and luminescence properties of superfine particles are reported. The results show that the strong blue-white emission is assigned to Ce⁴⁺–O²⁻ charge-transfer transition (CTT) of Sr₂CeO₄ and is not related to a lattice defect. The emission spectrum of post-heat-treated particles exhibits a broad band maximum at 470 nm, and the emission intensity is not affected by the existence of SeCe₄O₇.