Transition metal and rare earth doped Zn1.3Ga1.4Sn0.3O4 persistent phosphors for anti-counterfeiting applications

Guanyu Cai; Teresa Delgado; Cyrille Richard; Bruno Viana

doi:10.1117/12.2649803

14 March 2023 Transition metal and rare earth doped Zn_1.3Ga_1.4Sn_0.3O₄ persistent phosphors for anti-counterfeiting applications

Guanyu Cai, Teresa Delgado, Cyrille Richard, Bruno Viana

Author Affiliations +

Proceedings Volume 12417, Optical Components and Materials XX; 124170B (2023) https://doi.org/10.1117/12.2649803
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

Persistent luminescence (PersL) property offers great potential for anti-counterfeiting applications, by taking advantage of the possibility of making observations under background-free conditions. However, some challenges still persist, mainly due to the low security when working in the visible range. Thus, to overcome those difficulties, materials with near-infrared (NIR) emissions are highly required. In this work, we propose the use of Zn_1.3Ga_1.4Sn_0.3O₄ nanoparticles (ZGSO NPs, with size around 140 nm) doped with Cr³⁺,Ni²⁺,Er³⁺ which have a strong PersL at 700 nm (NIR-I) and at 1300 nm (NIR-II) by optimising the doping ratio of Ni²⁺ and Er³⁺ ions. Such ZGSO PersL NPs have been evaluated for multilevel anti-counterfeiting technology in dual-windows.

Conference Presentation

Citation Download Citation

Guanyu Cai, Teresa Delgado, Cyrille Richard, and Bruno Viana "Transition metal and rare earth doped Zn_1.3Ga_1.4Sn_0.3O₄ persistent phosphors for anti-counterfeiting applications", Proc. SPIE 12417, Optical Components and Materials XX, 124170B (14 March 2023); https://doi.org/10.1117/12.2649803

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