Luminescence Properties of BaGa2Si2O8:Eu2+, Eu3+, Pr3+ for Anticounterfeiting and Encryption

Lin FENG; Lei-lei XIANG; Jia-chi ZHANG

doi:10.3788/fgxb20204105.0510

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Luminescence Properties of BaGa₂Si₂O₈:Eu²⁺, Eu³⁺, Pr³⁺ for Anticounterfeiting and Encryption

Synthesis and Properties of Materials | 更新时间：2020-09-21

- Luminescence Properties of BaGa₂Si₂O₈:Eu²⁺, Eu³⁺, Pr³⁺ for Anticounterfeiting and Encryption
- Chinese Journal of Luminescence Vol. 41, Issue 5, Pages: 510-518(2020)
- 作者机构：
  
  兰州大学物理科学与技术学院, 甘肃兰州 730000
- 作者简介：
- 基金信息：
  
  Science and Technology Projects of Gansu Province
- DOI：10.3788/fgxb20204105.0510
  CLC： O482.31;TP391.4;TH691.9
- Published：2020-5，
  
  Received：14 March 2020，
  
  Accepted：25 March 2020
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Lin FENG, Lei-lei XIANG, Jia-chi ZHANG. Luminescence Properties of BaGa₂Si₂O₈:Eu²⁺, Eu³⁺, Pr³⁺ for Anticounterfeiting and Encryption. [J]. Chinese Journal of Luminescence 41(5):510-518(2020)
DOI：

Lin FENG, Lei-lei XIANG, Jia-chi ZHANG. Luminescence Properties of BaGa₂Si₂O₈:Eu²⁺, Eu³⁺, Pr³⁺ for Anticounterfeiting and Encryption. [J]. Chinese Journal of Luminescence 41(5):510-518(2020) DOI： 10.3788/fgxb20204105.0510.

摘要

采用高温固相法在单一基质中制备了具有多模态发光特性的系列荧光粉BaGa

：Eu

，Eu

，Pr

，掺入适量的Pr

可显著改善荧光粉的余辉发光性能。结果表明，该系列荧光粉在254 nm或365 nm的光激发下，具有不同颜色的光致发光和余辉发光，体现出多模发光特征；同时该系列荧光粉的余辉发光还具有不同的衰减时间。根据这些发光特性，选用合适的荧光粉制作了系列发光图案。相关典型应用示例表明，该发光图案的多模发光特征可应用于发光防伪应用，而基于其差异化的余辉衰减特性，还可以设计出可动态变化的余辉发光图案，从而增加发光防伪和加密的安全层级。

Abstract

BaGa

:Eu

phosphors with multi-modes luminescence were prepared by solid-state method. Meanwhile

the afterglow luminescence properties of phosphors are significantly increased by adding a proper content of Pr

. It demonstrates that the phosphors show photoluminescence and afterglow luminescence with different colors under 254 nm or 365 nm excitation

indicating the feature of multi-mode luminescence. Meanwhile

the afterglow luminescence of the phosphors also shows different decay time. According to these luminescent features

we choose the appropriate phosphors to make a series of luminescent patterns. The typical examples demonstrate that the multi-mode luminescent characteristic of the patterns can be used in anticounterfeiting. Moreover

based on its characteristic of different afterglow decay time

we can also design the dynamically changing luminescent patterns to increase the security level of anti-counterfeiting and encryption.

关键词

荧光粉发光性质防伪加密

Keywords

phosphorluminescence propertiesanticounterfeitingencryption

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State Key Laboratory of Luminescence and Applications， Changchun Institute of Optics， Fine Mechanics and Physics， Chinese Academy of Sciences， Changchun 130033， China

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