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A multicolor persistent luminescent phosphor Sr 2 Ga 2 GeO 7 :Pr 3+ for dynamic anticounterfeiting
Author(s) -
Ji Liping,
Zhou Jinyu,
Zhang Jiachi,
Zhang Zhiya,
Ma Zhidong,
Wang Wenxiang,
Li Huihui,
Wu Chunfang
Publication year - 2019
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.16432
Subject(s) - phosphor , luminescence , materials science , persistent luminescence , optoelectronics , relaxation (psychology) , thermoluminescence , psychology , social psychology
Persistent luminescence (PersL) phosphor is a glow‐in‐the‐dark material that has been widely applied. Here, we report a multicolor PersL phosphor Sr 2 Ga 2 GeO 7 :Pr 3+ . The PersL color can be tuned from deep red to blue. It reveals that the luminescent color modulation of the Sr 2 Ga 2 GeO 7 :Pr 3+ phosphor is essentially associated with the cross‐relaxation effect of Pr 3+ in the host with low‐phonon assistance energy. The PersL lifetime of the multicolor phosphors can be also tuned. Based on the unique features of Sr 2 Ga 2 GeO 7 :Pr 3+ phosphor, some simple PersL images are fabricated to emit dynamic multicolor information, and it shows that the PersL image even depicts dynamic multicolor anticounterfeiting.