Crystallization-induced emission from F-doped carbon dots

Area of Science:

• Materials Science
• Nanotechnology
• Photochemistry

Background:

• Carbon dots (CDs) are fluorescent nanomaterials with diverse applications.
• Achieving efficient solid-state luminescence in CDs remains a challenge due to aggregation-caused quenching.
• Fluorine doping is an emerging strategy to tune the properties of carbon dots.

Purpose of the Study:

• To synthesize F-doped CDs with bright red solid-state fluorescence (SSF).
• To investigate the role of fluorine doping and F-F interactions in inducing crystallization and luminescence.
• To explore the mechanism for achieving efficient solid luminescence in F-doped CDs.

Main Methods:

• Solvothermal synthesis using trifluoroethanol as solvent and m-hydroxybenzaldehyde as carbon source.
• Characterization of synthesized F-doped CDs using spectroscopic and microscopic techniques.
• Analysis of F-F interactions and their correlation with crystallization and luminescence properties.

Main Results:

• Successful synthesis of F-doped CDs with strong red SSF.
• Demonstration that strong F-F interactions are crucial for inducing the crystallization of CDs.
• Evidence that crystalline organization effectively blocks nonradiative energy dissipation pathways, leading to enhanced solid luminescence.

Conclusions:

• F-doped CDs can be effectively synthesized via a solvothermal method.
• F-F interactions play a critical role in the crystallization and solid-state luminescence of CDs.
• The developed F-doped CDs show potential for applications requiring efficient solid-state emitters.