Zn₃Ga₂(Ge_xSn_1−x)O₈:Yb,Er,Cr phosphors with different doping ratio of Ge/Sn were prepared by high temperature solid-state method. After excited at 270 nm with a xenon lamp for 15 min, the persistent luminescence (PL) of Zn₃Ga₂(Ge_xSn_1−x)O₈:Yb,Er,Cr phosphor can last more than 60 min. Under the excitation at 980 nm, Zn₃Ga₂(Ge_xSn_1−x)O₈:Yb,Er,Cr phosphors can generate effective up-conversion emissions from Er³⁺ ions at 410 nm, 525 nm, 550 nm, 660 nm and Cr³⁺ ions around 700 nm. Besides, after ceasing irradiation, Zn₃Ga₂(Ge_xSn_1−x)O₈:Yb,Er,Cr phosphors show up-conversion persistent luminescence (UCPL) from Cr³⁺ ions around 700 nm. Moreover, Zn₃Ga_1.995(Ge_0.3Sn_0.7) O₈:Yb³⁺,Er³⁺,Cr³⁺ phosphor is optimal with the best persistent luminescent and up-conversion persistent luminescent properties. In short, owing to the long afterglow time, strong up-conversion emissions and novel up-conversion persistent luminescence, the as-prepared Zn₃Ga₂(Ge_xSn_1−x)O₈:Yb,Er,Cr phosphors can be potentially applied in a wide range of fields, such as security materials, coating materials, infrared detection, fluorescent label, tracer and testing.

中文翻译：

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980 nm 激光激活的 Zn3Ga2(GexSn1-x)O8:Yb,Er,Cr 磷光体的上转换持久发光。

采用高温固相法制备了不同Ge/Sn掺杂比的Zn ₃ Ga ₂ (Ge _x Sn _1−x )O _{8 :Yb,Er,Cr荧光粉。Zn 3} Ga ₂ (Ge _x Sn _1−x )O ₈ :Yb,Er,Cr荧光粉在270 nm处用氙灯激发15分钟后，持久发光(PL)可持续60分钟以上。在980 nm激发下，Zn ₃ Ga ₂ (Ge _x Sn _1−x )O _{8 :Yb,Er,Cr荧光粉可以从Er} ³⁺产生有效的上转换发射410 nm、525 nm、550 nm、660 nm 的离子和 700 nm 左右的 Cr ³⁺离子。此外，停止照射后，Zn ₃ Ga ₂ (Ge _x Sn _1−x )O ₈ :Yb,Er,Cr 荧光粉在 700 nm 附近显示出来自 Cr ³⁺离子的上转换持久发光 (UCPL)。此外，Zn ₃ Ga _1.995 (Ge _0.3 Sn _0.7 ) O ₈ :Yb ³⁺ ,Er ³⁺ ,Cr ³⁺磷光体是最佳的，具有最好的持久发光和上转换持久发光特性。总之，由于余辉时间长，上转换发光强，上转换持久发光新颖，所制备的Zn ₃ Ga ₂ (Ge _x Sn _1−x )O ₈ :Yb,Er,Cr荧光粉可用于潜在应用领域广泛，如防伪材料、涂层材料、红外检测、荧光标签、示踪剂和测试等。