The color-tunable persistent luminescence of Pr3+-activated Ca2Sb2O7 with double anti-counterfeiting potentiality. Issue 24 (15th December 2022)

• Record Type: Journal Article
• Authors: Zhang, Xi; Guo, Haijie; Shi, Qiufeng; Cui, Cai'e; Cui, Yanxia; Huang, Ping; Wang, Lei
• Is Part Of: Ceramics international. Volume 48:Issue 24(2022)
• Page Start: 36201
• Page End: 36209
• Publication Date: 2022-12-15
• Subjects: Ca2Sb2O7:Pr3+ -- Multicolor -- Persistent luminescence -- Double anti-counterfeiting; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.08.177
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The persistent luminescence (PersL) materials Ca2 Sb2 O7 :Pr 3+ were prepared by traditional high-temperature solid-state method. We systematically investigated the crystal structure, band structure, photoluminescence, PersL performance by X-ray diffraction diagrams, Materials Studio calculation, photoluminescence (PL) spectra, PersL spectra and CIE coordinate analysis. The PL and PersL are attributed to the Sb 5+ → O 2− transition of the matrix and the 4f-4f transition of Pr 3+ ion. For the sake of explaining the impact of various traps on PersL performance, thermoluminescence (TL) tests were performed on the optimal sample after diverse charging and discharging times. It was concluded that shallow traps have priority over deep traps in capturing electrons, and the electrons in the shallow traps were preferentially released. The highlight of this work is that the PL and PersL color can be adjusted by regulating the Pr 3+ doping concentration when these samples were excited by a single excitation wavelength, so as to achieve a double anti-counterfeiting effect. Furthermore, the color change of PersL is different from that of PL. The luminescent patterns can make a difference as the change of concentration and time, forming a dynamic anti-counterfeiting mark that distinguishes in color and time. Thus, Ca2 Sb2 O7 :Pr 3+ has a bright application prospect in dynamic anti-counterfeiting field.