A Strategy for Synthesizing CaZnOS:Eu²⁺ Phosphor and Comparison of Optical Properties with CaS:Eu²⁺

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• 作者：Zhongxian Qiu ; Chunying Rong ; Wenli Zhou ; Jilin Zhang ; Chengzhi Li ; Liping Yu ; Shubin Liu ; Shixun Lian
• 关键词：Red-emitting phosphors ; CaZnOS ; Eu2+ ; CaS
• 刊名：Journal of Alloys and Compounds
• 出版年：15 January, 2014
• 年：2014
• 卷：583
• 期：Complete
• 页码：335-339
• 全文大小：1516 K

文摘

The red-emitting phosphor CaZnOS:Eu²⁺ was synthesized from CaCO₃, ZnS, Eu₂O₃ and CeCl₃ by controlling the sintering condition. It was found that Ce³⁺ ions can play a role of reductant to contribute to the formation of Eu²⁺ in CaZnOS matrix under inert protective atmosphere. While the gas flow changed to H₂/N₂, the product turned to CaS easily. XRD, photoluminescence spectra, UV-vis and IR absorption spectra were evaluated to investigate the origin of the distinctions of the optical properties and stabilities between the two divalent europium ions doped phosphors CaZnOS:Eu²⁺ and CaS:Eu²⁺. The similarities and differences between them were analyzed.