Photo-induced Afterglow of Carbon Dots for Dynamic Patterning
Abstract Flexible materials with afterglow feature have received considerable attention in the field of flexible electronics. To date, it is still a formidable challenge to develop flexible materials with dynamic long afterglow for practical applications. Herein, we report for the first time photo-induced long afterglow in a flexible solid composite film made of luminescent carbon dots (CDs) and the oxygen-permeable poly pyrrolidone (PVP). The phosphorescent afterglow of the film can be reversibly activated by photo-irradiation and de-activated by thermal treatment. Impressively, the photo-activation leads to a significant luminescence lifetime enhancement with a factor of over 3900, and editable afterglow patterns with fine resolution exceeding 1280 dpi are readily achieved by masking and lithography. Furthermore, the retention time of such memorized optical patterns can be tuned from minutes to days by varying temperature, enabling the unique time-temperature indicating function. These findings not only enrich both the library of the afterglow materials vastly, but also extend the scope of the potiential applications of CDs materials..
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Preprint| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
ResearchSquare.com - (2021) vom: 17. März Zur Gesamtaufnahme - year:2021 |
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| Sprache: |
Englisch |
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| Beteiligte Personen: |
Liu, Yanfeng [VerfasserIn] |
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| Links: |
Volltext [kostenfrei] |
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| doi: |
10.21203/rs.3.rs-56109/v1 |
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| 520 | |a Abstract Flexible materials with afterglow feature have received considerable attention in the field of flexible electronics. To date, it is still a formidable challenge to develop flexible materials with dynamic long afterglow for practical applications. Herein, we report for the first time photo-induced long afterglow in a flexible solid composite film made of luminescent carbon dots (CDs) and the oxygen-permeable poly pyrrolidone (PVP). The phosphorescent afterglow of the film can be reversibly activated by photo-irradiation and de-activated by thermal treatment. Impressively, the photo-activation leads to a significant luminescence lifetime enhancement with a factor of over 3900, and editable afterglow patterns with fine resolution exceeding 1280 dpi are readily achieved by masking and lithography. Furthermore, the retention time of such memorized optical patterns can be tuned from minutes to days by varying temperature, enabling the unique time-temperature indicating function. These findings not only enrich both the library of the afterglow materials vastly, but also extend the scope of the potiential applications of CDs materials. | ||
| 700 | 1 | |a Huang, Xin |e verfasserin |4 aut | |
| 700 | 1 | |a Niu, Zuoji |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Dongni |e verfasserin |4 aut | |
| 700 | 1 | |a Gou, Huilin |e verfasserin |4 aut | |
| 700 | 1 | |a Liao, Qiaobo |e verfasserin |4 aut | |
| 700 | 1 | |a Xi, Kai |e verfasserin |4 aut | |
| 700 | 1 | |a An, Zhongfu |e verfasserin |4 aut | |
| 700 | 1 | |a Jia, Xudong |e verfasserin |4 aut | |
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