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Multi-mode excited Cs2NaBiCl6 Based Double Perovskite Phosphor for Anti-counterfeiting.
- Source :
-
Journal of Luminescence . Jul2022, Vol. 247, pN.PAG-N.PAG. 1p. - Publication Year :
- 2022
-
Abstract
- Emission wavelength or color and excitation mode of luminescent materials play the decisive role in their applications of information hiding and anti-counterfeiting. Conventional luminescent anti-counterfeiting materials generally exhibit monochromatic emissions under the excitation of ultraviolet or near-infrared light, which are easily to be imitated or substituted. The development of multicolor and multimodal excitation in one single-phased host was regarded as effective strategy and significant challenges for luminescent anti-counterfeiting materials. As typical lead-free halide double perovskite material Cs2NaBiCl6 not only offers excellent stability and facile synthesis but also provides greater tolerance to rare earth and transitional ions, thus Er3+, Yb3+ and Mn2+ tri-doped Cs 2 NaBiCl 6 was synthesized by co-precipitation method at room temperature in this paper. The efficient green up- and strong orange red down-conversion (UC and DC) emissions were realized through irradiation of 980/1550 nm infrared light and 365 nm near ultraviolet light. The possible UC mechanisms and energy transfer from Er3+ to Mn2+ were also investigated, and some fluorescent security patterns were also designed to demonstrate the potential applications of the present samples in anti-counterfeiting and concealing important information. CNBC: 10% Er3+, 15% Yb3+, 15% Mn2+ exhibits brilliant green and orange emission under the excitation of 980, 1550 and 365 nm light, which present great potential for application in multi-mode anti-counterfeiting. [Display omitted] • The UC phosphor Cs 2 NaBiCl 6 was investigated. • The UC and DC emission color of Cs 2 NaBiCl 6 : Yb3+, Er3+, Mn2+ were discussed. • Potential application as anti-counterfeiting materials was evaluated. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00222313
- Volume :
- 247
- Database :
- Academic Search Index
- Journal :
- Journal of Luminescence
- Publication Type :
- Academic Journal
- Accession number :
- 156732088
- Full Text :
- https://doi.org/10.1016/j.jlumin.2022.118915