High-Temperature Resistance Photoluminescence Carbonized Polymer Dots Through Equilibrium Bi-Confinement Effects
© 2024 Wiley‐VCH GmbH.
| Veröffentlicht in: | Advanced materials (Deerfield Beach, Fla.). - 1998. - (2024) vom: 13. Dez., Seite e2407811 |
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| Weitere Verfasser: | , , , , , , , , , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2024
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| Zugriff auf das übergeordnete Werk: | Advanced materials (Deerfield Beach, Fla.) |
| Schlagworte: | Journal Article Al2O3 matrix carbon dots dynamic information encryption high‐temperature photoluminescence |
| Zusammenfassung: | © 2024 Wiley‐VCH GmbH. Carbon dots are emerging luminescent nanomaterials that have drawn considerable attention due to their abundance, environmental friendliness, and customizable optical properties. However, their susceptibility to temperature-induced vibrational exciton changes and the tendency to thermal quenching of emission have hindered their practical applications. Here, a method is reported for achieving high-temperature photoluminescence carbonized polymer dots (CPDs) through a bi-confinement approach that involves a highly cross-linked polymer network and a rigid Al2O3 matrix. As the temperature increased from 303 to 500 K, the fluorescence and phosphorescence emission intensities of CPDsAl2O3 remained virtually unchanged, with the emission duration exceeding 150 h at 500 K. Additionally, CPDs@Al2O3 composites with different degrees of carbonization exhibit dynamic excitation-dependent photoluminescence properties, which can be patterned for multiple information encryption application. This work provides a concept for designing stable and luminous CPDs under harsh conditions, thus expanding their potential application range |
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| Beschreibung: | Date Revised 13.12.2024 published: Print-Electronic Citation Status Publisher |
| ISSN: | 1521-4095 |
| DOI: | 10.1002/adma.202407811 |