Tailor Traps in Bi3+-Doped NaGdGeO4 Phosphors by Introducing Eu3+ Ions to Switch Multimodal Phosphorescence Emission

Zhichao Liu; Xue Yu; Xiuxia Yang; Qingpeng Peng; Xiaodie Zhu; Xuhui Xu; Jianbei Qiu

doi:10.1021/acs.inorgchem.3c01683

Tailor Traps in Bi³⁺-Doped NaGdGeO₄ Phosphors by Introducing Eu³⁺ Ions to Switch Multimodal Phosphorescence Emission

Inorg Chem. 2023 Aug 21;62(33):13362-13369. doi: 10.1021/acs.inorgchem.3c01683. Epub 2023 Aug 4.

Authors

Zhichao Liu¹, Xue Yu², Xiuxia Yang³, Qingpeng Peng¹, Xiaodie Zhu¹, Xuhui Xu¹, Jianbei Qiu¹

Affiliations

¹ Faculty of Materials Science and Engineering, Key Laboratory of Advanced Materials of Yunnan Province, Kunming University of Science and Technology, Kunming, Yunnan 650093, P.R. China.
² School of Mechanical Engineering, Institute for Advanced Study, Institute for Advanced Materials Deformation and Damage from Multi-Scale, Chengdu University, Chengdu 610106, P.R. China.
³ Key Laboratory of Optoelectronic Materials Chemistry and Physics, Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.

PMID: 37540209
DOI: 10.1021/acs.inorgchem.3c01683

Abstract

Featured with a tunable excitation/emission wavelength and excellent physicochemical stability, inorganic fluorescent materials are widely used in the fields of anti-counterfeiting. Here, we design a multi-stimuli-responsive dynamic fluorescence and phosphorescence anti-counterfeiting material by introducing Eu³⁺ ions in NaGdGeO₄: Bi³⁺ to tailor the trap structure. The photoluminescence (PL), long persistent luminescence (LPL), and photo-stimulated luminescence (PSL) colors of NaGdGeO₄: Bi³⁺, Eu³⁺ can be switched by varying the excitation modes (ultraviolet, near infrared, and X-ray light). Especially, the LPL and PSL colors of NaGdGeO₄: Bi³⁺, Eu³⁺ vary with increasing decay and stimulation times. In addition, X-ray excitation ensures the specificity of the luminescence of NaGdGeO₄: Bi³⁺, Eu³⁺ compared with ultraviolet excitation. This rapidly-changing-color fluorescent material offers the possibility of sophisticated anti-counterfeiting applications in the future.