Photo-and Electroluminescence from Nitrogen-Doped and Nitrogen-Sulfur Codoped Graphene Quantum Dots

We develop nitrogen-doped and nitrogen–sulfur codoped graphene quantum dots exhibiting high-yield visible and near-IR emission that are synthesized via a single-step microwave-assisted hydrothermal technique with a single glucosamine-HCl starting material

Md Tanvir Hasan; Roberto Gonzalez-Rodriguez; Conor Ryan; Nicolas Faerber; Jeffery L. Coffer; Anton V. Naumov

2018

Key concepts

Scholarcy highlights

  • As opposed to inorganic counterparts, organic quantum dots often exhibit lower fluorescence efficiencies and are complex to synthesize
  • We develop nitrogen-doped and nitrogen–sulfur codoped graphene quantum dots exhibiting high-yield visible and near-IR emission that are synthesized via a single-step microwave-assisted hydrothermal technique with a single glucosamine-HCl starting material
  • Unlike other graphene-based quantum dots, these GQDs exhibit bright, stable fluorescence both in the visible and near-IR with high quantum yields of up to 60%
  • Excitation-dependent visible fluorescence is attributed to size-dependent bandgaps, with near-IR emission potentially arising from the emissive defect states/their arrangements
  • Any queries should be directed to the corresponding author for the article

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