Combination of carbon dot and polymer dot phosphors for white light-emitting diodes
Literature Information
Chun Sun, Kai Sun, Claas Reckmeier, Tieqiang Zhang, XiaoYu Zhang, Jun Zhao, Changfeng Wu, Andrey L. Rogach
We realized white light-emitting diodes with high color rendering index (85–96) and widely variable color temperatures (2805–7786 K) by combining three phosphors based on carbon dots and polymer dots, whose solid-state photoluminescence self-quenching was efficiently suppressed within a polyvinyl pyrrolidone matrix. All three phosphors exhibited dominant absorption in the UV spectral region, which ensured the weak reabsorption and no energy transfer crosstalk. The WLEDs showed excellent color stability against the increasing current because of the similar response of the tricolor phosphors to the UV light variation.
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Source Journal
Nanoscale

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