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Mn²⁺和Sb³⁺编码Cs₂ZnCl₄金属化物与激发波长依赖的发射光防伪

Tiancheng Zheng¹, Huanxin Yang¹, Yuling Liu¹

¹Solar Energy Conversion Center, Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education, Institute of Photoelectronic Thin Film Devices and Technology, Nankai University, Tianjin 300350, P.R. China.

Inorganic chemistry

|October 7, 2023

概括

研究人员开发了一种单元,多色发光材料,用于防伪. 这种环保的材料,Cs₂ZnCl₄:Mn²⁺,Sb³⁺,根据激发波长显示可调节的光.

科学领域:

材料科学材料科学材料科学
摄影化学的使用.
固态化学固态化学

背景情况:

对先进的防伪解决方案的需求日益增长.
低维金属化物提供环保,稳定,易于合成的发光材料.
需要单元,多模式光材料.

研究的目的:

合成和表征Mn2+和Sb3+编的Cs2和ZnCl单晶.
为了研究codoped晶体的光发光特性和机制.
为了证明这些晶体在多模式防伪应用中的潜力.

主要方法:

易于通过热水合成的Cs2ZnCl4:Mn2+,Sb3+单晶.
在各种激发波长 (365 nm,316 nm,460 nm) 下进行光发光谱学.
对发光机制的分析,包括与剂相关的和自我捕获的刺激子排放.

主要成果:

在365nm激发下,密封的晶体表现出双带辐射 (绿色和红色).
观察到取决于激发的辐射光谱,显示730nm (316nm激发) 和530nm (460nm激发) 的单个波段.
由于零维主体结构中能量转移最小,因此实现了光度比的独立调节.

结论:

绿色的辐射来自Mn2+,而红色的辐射来自[SbCl4]-集群的自我被捕捉的激子.
这些Cs2ZnCl4:Mn2+,Sb3+晶体表现出激发波长依赖的多色发光.
这些发现使环境友好,单元,多模式防伪系统的设计成为可能.

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