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Area of Science:

  • Materials Science
  • Chemistry
  • Nanotechnology

Background:

  • Delayed fluorescent (DF) materials utilize triplet excitons for high quantum efficiency and extended luminescence lifetimes.
  • Carbon dots (CDs) are emerging as promising DF materials due to their low toxicity, environmental friendliness, stability, and cost-effectiveness compared to traditional alternatives.

Purpose of the Study:

  • To systematically review the DF mechanisms and structural regulation strategies of carbon dot-based DF materials.
  • To introduce the diverse applications of CDs-based DF materials, including anti-counterfeiting, information encryption, and temperature sensing.

Main Methods:

  • Summarizing existing literature on the fundamental principles of delayed fluorescence in carbon dots.
  • Analyzing strategies for structural modification and matrix integration (covalent, hydrogen bonding, supramolecular) of carbon dots.
  • Highlighting recent advancements in matrix-free, self-protective carbon dot-based DF materials.

Main Results:

  • Carbon dot-based DF materials exhibit tunable luminescence properties through structural control.
  • Both matrix-embedded and emerging matrix-free carbon dot DF materials show significant potential.
  • Applications span advanced fields like anti-counterfeiting, secure information encryption, and precise temperature sensing.

Conclusions:

  • Carbon dot-based DF materials represent a significant advancement over traditional materials.
  • Further research into structural regulation and matrix-free designs can unlock new potentials.
  • These materials are poised for impactful applications in various high-tech fields.