Visible Light-Activated Ultralong-Lived Triplet Excitons of Carbon Dots for White-Light Manipulated Anti-Counterfeiting
© 2023 Wiley-VCH GmbH..
Room temperature phosphorescence (RTP) has emerged as an interesting but rare phenomenon with multiple potential applications in anti-counterfeiting, optoelectronic devices, and biosensing. Nevertheless, the pursuit of ultralong lifetimes of RTP under visible light excitation presents a significant challenge. Here, new phosphorescent materials that can be excited by visible light with record-long lifetimes are demonstrated, realized through embedding nitrogen doped carbon dots (N-CDs) into a poly(vinyl alcohol) (PVA) film. The RTP lifetime of the N-CDsPVA film is remarkably extended to 2.1 s excited by 420 nm, representing the highest recorded value for visible light-excited phosphorescent materials. Theoretical and experimental studies reveal that the robust hydrogen bonding interactions can effectively reduce the non-radiative decay rate and radiative transition rate of triplet excitons, thus dramatically prolong the phosphorescence lifetime. Notably, the RTP emission of N-CDs@PVA film can also be activated by easily accessible low-power white-light-emitting diode. More significantly, the practical applications of the N-CDs@PVA film in state-of-the-art anti-counterfeiting security and optical information storage domains are further demonstrated. This research offers exciting opportunities for utilizing visible light-activated ultralong-lived RTP systems in a wide range of promising applications.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:20 |
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| Enthalten in: |
Small (Weinheim an der Bergstrasse, Germany) - 20(2024), 1 vom: 30. Jan., Seite e2304958 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Xu, Bin [VerfasserIn] |
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| Links: |
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| Themen: |
Anti-counterfeiting |
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| Anmerkungen: |
Date Revised 04.01.2024 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1002/smll.202304958 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM361470231 |
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| 520 | |a © 2023 Wiley-VCH GmbH. | ||
| 520 | |a Room temperature phosphorescence (RTP) has emerged as an interesting but rare phenomenon with multiple potential applications in anti-counterfeiting, optoelectronic devices, and biosensing. Nevertheless, the pursuit of ultralong lifetimes of RTP under visible light excitation presents a significant challenge. Here, new phosphorescent materials that can be excited by visible light with record-long lifetimes are demonstrated, realized through embedding nitrogen doped carbon dots (N-CDs) into a poly(vinyl alcohol) (PVA) film. The RTP lifetime of the N-CDsPVA film is remarkably extended to 2.1 s excited by 420 nm, representing the highest recorded value for visible light-excited phosphorescent materials. Theoretical and experimental studies reveal that the robust hydrogen bonding interactions can effectively reduce the non-radiative decay rate and radiative transition rate of triplet excitons, thus dramatically prolong the phosphorescence lifetime. Notably, the RTP emission of N-CDs@PVA film can also be activated by easily accessible low-power white-light-emitting diode. More significantly, the practical applications of the N-CDs@PVA film in state-of-the-art anti-counterfeiting security and optical information storage domains are further demonstrated. This research offers exciting opportunities for utilizing visible light-activated ultralong-lived RTP systems in a wide range of promising applications | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a anti-counterfeiting | |
| 650 | 4 | |a carbon dots | |
| 650 | 4 | |a hydrogen bonding | |
| 650 | 4 | |a phosphorescence | |
| 650 | 4 | |a ultralong-lived | |
| 700 | 1 | |a Jia, Yuehan |e verfasserin |4 aut | |
| 700 | 1 | |a Ning, Huiying |e verfasserin |4 aut | |
| 700 | 1 | |a Teng, Qian |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Chenhao |e verfasserin |4 aut | |
| 700 | 1 | |a Fang, Xiaoqi |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Jie |e verfasserin |4 aut | |
| 700 | 1 | |a Zhou, Heng |e verfasserin |4 aut | |
| 700 | 1 | |a Meng, Xiangeng |e verfasserin |4 aut | |
| 700 | 1 | |a Gao, Zhenhua |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Xue |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Zifei |e verfasserin |4 aut | |
| 700 | 1 | |a Yuan, Fanglong |e verfasserin |4 aut | |
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