Time-dependent photoluminescence patterns based on Cr3+-doped and co-doped Zn3Ga2Ge2 O10

In this paper, we pursued developing a kind of novel time-dependent patterns based on persistent luminescence (PersL). We prepared a series of Cr3+-doped PersL: ZGGO: m%Cr3+ (m = 0.5, 1, 2, 5); and co-doped PersL: ZGGO: 1%Cr3+, n%Yb3+, ZGGO: 1%Cr3+, n%Eu3+, (n = 0.5, 1, 2, 5). All the Cr3+-doped and co-doped ZGGOs possessed high-performance persistent luminescence property, which exhibited a 723 nm peaking luminescence and persistent luminescence under UV irradiation. The ZGGOs appeared similar in emission wavelength and color, except persistent luminescence intensity decreased for different degrees. Based on the properties of the materials, we produced the photoluminescence patterns which exhibit a time-dependent factor. Those were a flower-like pattern, a Chinese Taiji pattern, and a solar eclipse pattern. This strategy could provide a future use for information storage, security signs, and anti-counterfeiting.

Automated summary

This paper developed a novel time-dependent pattern based on persistent luminescence (PersL) by preparing materials with high-performance persistent luminescence property and creating photoluminescence patterns, such as flower-like, Chinese Taiji, and solar eclipse patterns. These patterns could potentially be used for information storage, security signs, and anti-counterfeiting.