Lanthanide-Doped Cs 2 ZrCl 6 Perovskite Nanocrystals for Multimode Anti-Counterfeiting Application.
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| Title: | Lanthanide-Doped Cs 2 ZrCl 6 Perovskite Nanocrystals for Multimode Anti-Counterfeiting Application. |
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| Authors: | You, Longbin1 (AUTHOR), Wang, Qixin1 (AUTHOR), Liao, Yuting1 (AUTHOR), Zhu, Xiaotian1 (AUTHOR), Ding, Keyuan1 (AUTHOR), Chen, Xian1 (AUTHOR) x.chen@szu.edu.cn |
| Source: | Nanomaterials (2079-4991). Jan2026, Vol. 15 Issue 1, p68. 13p. |
| Subjects: | Forgery, Product counterfeiting prevention, Phosphors, Luminescence, Perovskite, Energy transfer, Perovskite crystallography, Doping agents (Chemistry) |
| Abstract: | The escalating prevalence of counterfeiting and forgery has imposed unprecedented demands on advanced anti-counterfeiting technologies. Traditional luminescent materials, relying on single-mode or static emission, are inherently vulnerable to replication using commercially available phosphors or simple spectral blending. Multimode luminescent materials exhibiting excitation wavelength-dependent emission offer significantly higher encoding capacity and forgery resistance. Herein, we report the colloidal synthesis of lanthanide-doped Cs2ZrCl6 nanocrystals (Ln3+ = Tb, Eu, Pr, Sm, Dy, Ho) via a robust hot-injection route. These nanocrystals universally exhibit efficient host-to-guest energy transfer from self-trapped excitons (STEs) under 254 nm, yielding sharp characteristic Ln3+ f–f emission alongside the intrinsic broadband STE luminescence. Critically, Tb3+ enables direct 4f → 5d excitation at ~275 nm, while Eu3+ introduces a low-energy Eu3+ ← Cl− LMCT band at ~305 nm, completely bypassing STE emission. Due to their multimode luminescent characteristics, we fabricate a triple-mode anti-counterfeiting label displaying different colors under different types of excitation. These findings establish a breakthrough excitation-encoded multimode platform, offering potential applications for next-generation photonic security labels, scintillation detectors, and solid-state lighting applications. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | The escalating prevalence of counterfeiting and forgery has imposed unprecedented demands on advanced anti-counterfeiting technologies. Traditional luminescent materials, relying on single-mode or static emission, are inherently vulnerable to replication using commercially available phosphors or simple spectral blending. Multimode luminescent materials exhibiting excitation wavelength-dependent emission offer significantly higher encoding capacity and forgery resistance. Herein, we report the colloidal synthesis of lanthanide-doped Cs2ZrCl6 nanocrystals (Ln3+ = Tb, Eu, Pr, Sm, Dy, Ho) via a robust hot-injection route. These nanocrystals universally exhibit efficient host-to-guest energy transfer from self-trapped excitons (STEs) under 254 nm, yielding sharp characteristic Ln3+ f–f emission alongside the intrinsic broadband STE luminescence. Critically, Tb3+ enables direct 4f → 5d excitation at ~275 nm, while Eu3+ introduces a low-energy Eu3+ ← Cl− LMCT band at ~305 nm, completely bypassing STE emission. Due to their multimode luminescent characteristics, we fabricate a triple-mode anti-counterfeiting label displaying different colors under different types of excitation. These findings establish a breakthrough excitation-encoded multimode platform, offering potential applications for next-generation photonic security labels, scintillation detectors, and solid-state lighting applications. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 20794991 |
| DOI: | 10.3390/nano16010068 |
