Afterglow luminescence properties and mechanism of novel orange afterglow phosphor: Ca₂Sb₂O₇:Sm³⁺

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• 作者：Liurong Shi ; Jiachi Zhang ; Huihui Li ; Pengfei Feng ; Xue Liu ; Zhongqiu Fu ; Yuhua Wang
• 关键词：Ca2Sb2O7 ; Sm3+ ; Afterglow luminescence ; Phosphor
• 刊名：Journal of Alloys and Compounds
• 出版年：2013
• 出版时间：5 December, 2013
• 年：2013
• 卷：579
• 期：Complete
• 页码：82-85
• 全文大小：1149 K

文摘

A novel afterglow phosphor Ca₂Sb₂O₇:Sm³⁺ with a weberite-type structure is synthesized using a solid state reaction at 1150 ¡ãC. The intense orange afterglow luminescence is first observed in antimonates (Ca₂Sb₂O₇:Sm³⁺) and lasts for approximately 770 s (0.32 mcd/m²). The afterglow emissions are composed of host emission and characteristic emission lines of Sm³⁺. Further, the Sm³⁺ ions not only act as afterglow emission centers but also serve as aliovalent auxiliaries to create hole traps. The thermoluminescence indicates that at least two types of traps are created by doping Sm³⁺ ions, which are basically responsible for the afterglow luminescence of Ca₂Sb₂O₇:Sm³⁺. Accordingly, the possible afterglow luminescence mechanism of Ca₂Sb₂O₇:Sm³⁺ is proposed.