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Abstract Photoluminescence (PL), up‐conversion PL (UCPL), and phosphorescence are three kinds of phenomena common to light‐emitting materials, but it is very difficult to observe all of them simultaneously when they are derived from a single material at room temperature. For the first time, triple‐mode emission (that is, PL, UCPL, and room temperature phosphorescence (RTP)) is reported, which relies on a composite of the luminescent carbon dots (CDs) prepared from m ‐phenylenediamine and poly(vinyl alcohol) (PVA). Moreover, the CDs‐PVA aqueous dispersion is nearly colorless and demonstrates promise as a triple‐mode emission ink in the field of advanced anti‐counterfeiting.
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Kai Jiang
Jiangnan University
Ling Zhang
Hainan University
Junfeng Lu
Chinese Academy of Sciences
Angewandte Chemie
Southeast University
Chongqing University
Ningbo Institute of Industrial Technology
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Jiang et al. (Mon,) studied this question.
synapsesocial.com/papers/6a1d0234ba65f5ee325da667 — DOI: https://doi.org/10.1002/ange.201602445