Affiliation:
1. Materials Science and Engineering Chongqing University of Technology Chongqing 400054 China
2. Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates (South China University of Technology) Guangzhou 510640 China
Abstract
AbstractCarbon dots (CDs) based room temperature phosphorescence (RTP) materials can be prepared via facile procedures and exhibit excellent photostability and biocompatibility. Furthermore, doping of hetero‐atoms into CDs can afford multiple triplet levels. The RTP emission generated from the resultant CDs always displays outstanding dynamic behaviors and even can be efficiently excited by visible light. Given this, CDs‐based RTP materials not only can be used for anti‐counterfeiting but also exhibit great application potential in signage and illumination fields. In this contribution, a type of B, N, and P co‐doped CDs are prepared in hectogram scale. Upon excitation by UV lamp and white LED, the obtained CDs emit green and yellow RTP, respectively, the lifetime of which are 851 and 481 ms, respectively. It is found that the luminescence color of the CDs can be further tuned. By controlling the degree of carbonization, the RTP color of the CDs can be facilely tuned from green to orange‐red. Based on an energy transfer strategy, the luminescence color can be further tuned to red. Benefited from the dynamic and visible‐excited colorful RTP emission, the application of these obtained CDs in anti‐counterfeiting, fingerprint collection, and luminescent traffic signage are also explored.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Chongqing
Cited by
1 articles.
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