The photoluminescence mechanism in carbon dots (graphene quantum dots, carbon nanodots, and polymer dots): current state and future perspective

At present, the actual mechanism of the photoluminescence of fluorescent carbon dots is still an open debate among researchers

Shoujun Zhu; Yubin Song; Xiaohuan Zhao; Jieren Shao; Junhu Zhang; Bai Yang

2015

Key concepts

Scholarcy highlights

  • At present, the actual mechanism of the photoluminescence of fluorescent carbon dots is still an open debate among researchers
  • This review will focus on the PL mechanism of CDs
  • Four reasonable PL mechanisms have been confirmed: the quantum confinement effect or conjugated π-domains, which are determined by the carbon core; the surface state, which is determined by hybridization of the carbon backbone and the connected chemical groups; the molecule state, which is determined solely by the fluorescent molecules connected on the surface or interior of the CDs; and the crosslink-enhanced emission effect
  • To give a thorough summary, the category and synthesis routes, as well as the chemical/physical properties for the carbon dots, are briefly introduced in advance

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