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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.
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]
Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
  Group: Ti
  Data: Lanthanide-Doped Cs 2 ZrCl 6 Perovskite Nanocrystals for Multimode Anti-Counterfeiting Application.
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  Data: <searchLink fieldCode="AR" term="%22You%2C+Longbin%22">You, Longbin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Qixin%22">Wang, Qixin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liao%2C+Yuting%22">Liao, Yuting</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhu%2C+Xiaotian%22">Zhu, Xiaotian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ding%2C+Keyuan%22">Ding, Keyuan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Xian%22">Chen, Xian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> x.chen@szu.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. Jan2026, Vol. 15 Issue 1, p68. 13p.
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  Data: <searchLink fieldCode="DE" term="%22Forgery%22">Forgery</searchLink><br /><searchLink fieldCode="DE" term="%22Product+counterfeiting+prevention%22">Product counterfeiting prevention</searchLink><br /><searchLink fieldCode="DE" term="%22Phosphors%22">Phosphors</searchLink><br /><searchLink fieldCode="DE" term="%22Luminescence%22">Luminescence</searchLink><br /><searchLink fieldCode="DE" term="%22Perovskite%22">Perovskite</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+transfer%22">Energy transfer</searchLink><br /><searchLink fieldCode="DE" term="%22Perovskite+crystallography%22">Perovskite crystallography</searchLink><br /><searchLink fieldCode="DE" term="%22Doping+agents+%28Chemistry%29%22">Doping agents (Chemistry)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: 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]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/nano16010068
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      – Code: eng
        Text: English
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        PageCount: 13
        StartPage: 68
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      – SubjectFull: Forgery
        Type: general
      – SubjectFull: Product counterfeiting prevention
        Type: general
      – SubjectFull: Phosphors
        Type: general
      – SubjectFull: Luminescence
        Type: general
      – SubjectFull: Perovskite
        Type: general
      – SubjectFull: Energy transfer
        Type: general
      – SubjectFull: Perovskite crystallography
        Type: general
      – SubjectFull: Doping agents (Chemistry)
        Type: general
    Titles:
      – TitleFull: Lanthanide-Doped Cs 2 ZrCl 6 Perovskite Nanocrystals for Multimode Anti-Counterfeiting Application.
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            NameFull: You, Longbin
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            NameFull: Wang, Qixin
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            NameFull: Liao, Yuting
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            – D: 01
              M: 01
              Text: Jan2026
              Type: published
              Y: 2026
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