• Journal of Inorganic Materials
  • Vol. 36, Issue 12, 1256 (2021)
Cong ZHANG*, Yurou LI, Kang SHAO, Jing LIN, Kai WANG, and Zaifa PAN
Author Affiliations
  • College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
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    DOI: 10.15541/jim20210043 Cite this Article
    Cong ZHANG, Yurou LI, Kang SHAO, Jing LIN, Kai WANG, Zaifa PAN. Luminescence Property of the Multicolor Persistent Luminescence Materials for Dynamic Anti-counterfeiting Applications[J]. Journal of Inorganic Materials, 2021, 36(12): 1256 Copy Citation Text show less

    Abstract

    Luminescent anti-counterfeiting has characteristics of visibility and convenience, which is a popular method in many anti-counterfeiting technologies. However, this anti-counterfeiting luminescent materials have the shortcomings of single emission color and static anti-counterfeiting pattern, leading to easy imitablity. It is urgent to develop new luminescent materials that can achieve dynamic and more reliable anti-counterfeiting performance. In this research, the multicolor persistent luminescence material, chromium doped zinc gallogermanate, was prepared by hydrothermal method. Its persistent luminescence property and dynamic anti-counterfeiting application potential were investigated. Experimental results show that the emission intensity in blue-green and red light regions can be adjusted by changing the raw materials ratio of gallium to germanium. Under the excitation of 254 and 365 nm UV light, a series of samples are observed to be white and red, respectively, indicating multi-mode luminescence characteristics. Furthermore, the decay rate of blue, green and red components in white afterglow is different, so the afterglow color can change dynamically over time. Anti-counterfeiting patterns, designed based on this multicolor afterglow features, improves the security through dynamic change of afterglow color in the time dimension, demonstrating the potential application in dynamic anti-counterfeiting.
    Cong ZHANG, Yurou LI, Kang SHAO, Jing LIN, Kai WANG, Zaifa PAN. Luminescence Property of the Multicolor Persistent Luminescence Materials for Dynamic Anti-counterfeiting Applications[J]. Journal of Inorganic Materials, 2021, 36(12): 1256
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