Towards Red Emissive Systems Based on Carbon Dots

In this review we present promising strategies for the synthesis of carbon dots -based systems with predominantly red-shifted optical signals

Spyridon Gavalas; Antonios Kelarakis

2021

Scholarcy highlights

  • The dynamic presence of carbon dots in the field of nanoemitters over the last 15 years is directly related to their unique combination of three desired characteristics: inexpensive preparation, nontoxic nature and superior photophysical properties in terms of light absorption, chemiluminescence, electroluminescence, phosphorescence and upconversion
  • GQDS are considered as a distinct subgroup of C-dots and are synthesized by various strategies including chemical vapor deposition on hexagonal boron nitride substrates, all-organic synthesis starting from polyphenylene dendrimers and ring opening of fullerenes adsorbed to Ru metal terraces
  • In this review we present promising strategies for the synthesis of C-dot-based systems with predominantly red-shifted optical signals
  • It has been supported that N doping can reduce the bandgap and improve bandgap uniformity of C-dots, enhancing red emissions with a narrow full width at half maximum
  • Gao et al followed hydrothermal treatment of citric acid and neutral red dye to prepare red-emissive C-dots, the PL of which quenched in the presence of Pt2+ due to a rapid electron-transfer process between the metal ions and the C-dots’ surface
  • In terms of biomass utilization, we note that red-emitting N,Mg codoped carbon dots from the leaves extract of Bougainvillea plant showed λex -independent emissions with λmax = 678 nm and quantum yield = 40% , while

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