Carbogenic π-conjugated domains as the origin of afterglow emissions in carbon dot-based organic composite films

This study reports the carbon core-dominated afterglow emission of carbon dot -based composite films with readily tunable emissions and highlights the advantage of using aromatic precursors by enlarging the π-conjugated domains in the carbogenic core

Lu Zhai

2021

Scholarcy highlights

  • The development of carbon dot-based pure organic materials displaying afterglow emissions under ambient conditions with readily tunable emissions is highly desirable
  • The simple achievement of tunable fluorescence and afterglow emissions can be accompanied by either pre-treatment of the CDs or post-treatment of the composite film with an alkaline solution where a pure blue afterglow emission film of CD2-OH/polyvinyl alcohol with CIE coordinates of, a lifetime up to 338.4 ms and a quantum yield up to 6.88% under ambient conditions is achieved
  • Studies show that the incorporation of an aromatic precursor in the CD fabrication process can enlarge the carbogenic π-conjugated domains of CDs, which are suggested as the main origin of the afterglow emissions
  • The simple achievement of tunable fluorescence and afterglow emissions can be accompanied by either pre-treatment of the carbon dot or post-treatment of the composite film with an alkaline solution where a pure blue afterglow emission film of CD2-OH/polyvinyl alcohol with CIE coordinates of, a lifetime up to 338.4 ms and a quantum yield up to 6.88% under ambient conditions is achieved

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