期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 60, 期 41, 页码 22253-22259出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202108696
关键词
carbon dots; energy transfer; near-infrared-excited material; room-temperature afterglow; upconversion
资金
- National Natural Science Foundation of China [51602108, 52073242, 52172142]
- Guangdong Basic and Applied Basic Research Foundation [2020A1515011210]
- Science and Technology Planning Project of Guangzhou City [202007020005, 202102080288]
- Hong Kong Research Grants Council [PolyU 153058/19P]
- Hong Kong Polytechnic University [1-ZE1C]
- Endowed Professorship in Energy from Ms. Clarea Au [847S]
This study presents a universal approach based on efficient radiative energy transfer to activate multicolor afterglow in CDAMs. The results demonstrate persistent multicolor afterglow activation and potential applications in fields such as fingerprint recognition and information security.
Room-temperature afterglow (RTA) materials with long lifetime have shown tremendous application prospects in many fields. However, there is no general design strategy to construct near-infrared (NIR)-excited multicolor RTA materials. Herein, we report a universal approach based on the efficient radiative energy transfer that supports the reabsorption from upconversion materials (UMs) to carbon dots-based RTA materials (CDAMs). Thus, the afterglow emission (blue, cyan, green, and orange) of various CDAMs can be activated by UMs under the NIR continuous-wave laser excitation. The efficient radiative energy transfer ensured the persistent multicolor afterglow up to 7 s, 6 s, 5 s, and 0.5 s by naked eyes, respectively. Given the unusual afterglow properties, we demonstrated preliminary applications in fingerprint recognition and information security. This work provides a new avenue for the activation of NIR-excited afterglow in CDAMs and will greatly expand the applications of RTA materials.
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