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Sr 2 BiF 7 : A New Bismuth-Based Host Material for Lanthanide Ions Doping: Synthesis, Downshifting, and Upconversion Luminescence Properties for Multimode Anticounterfeiting.
- Source :
-
ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2024 Sep 25; Vol. 16 (38), pp. 51028-51036. Date of Electronic Publication: 2024 Sep 12. - Publication Year :
- 2024
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Abstract
- A new bismuth-based host material, i.e., Sr <subscript>2</subscript> BiF <subscript>7</subscript> , is explored in this work. Undoped and lanthanide ion-doped Sr <subscript>2</subscript> BiF <subscript>7</subscript> nanomaterials are prepared using a simple coprecipitation technique at 120 °C. The undoped nanomaterials exhibit a blue color under 365 nm excitation. The downshifting and upconversion photoluminescent properties of Er and Yb codoped Sr <subscript>2</subscript> BiF <subscript>7</subscript> nanomaterials are investigated. The optimum up-conversion luminescence is produced by nanomaterials doped with 5% Yb <superscript>3+</superscript> and 0.2% Er <superscript>3+</superscript> . These nanomaterials show blue and magenta colors upon excitation at 365 and 395 nm wavelengths, respectively. Sr <subscript>2</subscript> BiF <subscript>7</subscript> material doped with Er <superscript>3+</superscript> shows green emission, while the codoped Er <superscript>3+</superscript> , Yb <superscript>3+</superscript> nanomaterials exhibit an orange-red color under 980 nm light. A specific amount of polyvinyl chloride (PVC) is used for producing luminescent ink with these nanoparticles for multimode anticounterfeiting applications. The letters and patterns written with luminescent ink based on Er <superscript>3+</superscript> , Yb <superscript>3+</superscript> doped nanomaterials show blue, magenta, and orange-red colors under 365, 395, and 980 nm light, respectively. These results establish that this material can be effectively used as a multimode photoluminescent covert tag to combat counterfeiting.
Details
- Language :
- English
- ISSN :
- 1944-8252
- Volume :
- 16
- Issue :
- 38
- Database :
- MEDLINE
- Journal :
- ACS applied materials & interfaces
- Publication Type :
- Academic Journal
- Accession number :
- 39262382
- Full Text :
- https://doi.org/10.1021/acsami.4c08301