Aluminum-Based Surface Polymerization on Carbon Dots with Aggregation-Enhanced Luminescence

Area of Science:

• Materials Science
• Nanotechnology
• Photochemistry

Background:

• Aggregation-induced luminescence quenching hinders carbon nanodot (CD) applications in solid-state devices.
• Developing stable, solid-state emissive nanomaterials is crucial for advanced optoelectronics.

Purpose of the Study:

• To develop a one-step synthesis for solid-state emissive carbon nanodots (CDs).
• To overcome aggregation-induced luminescence quenching in carbon nanodots.
• To enhance green emission properties for light-emitting applications.

Main Methods:

• One-step microwave-assisted synthesis using citric acid, urea, and aluminum chloride (AlCl3).
• Surface polymerization utilizing the coordination ability of aluminum ions.
• Characterization of photoluminescence quantum yield (PLQY) in the solid state.

Main Results:

• Successfully synthesized solid-state emissive carbon nanodots with surface aluminum-based polymerization.
• Aluminum-based polymerization prevented aggregation of carbon cores and facilitated energy transfer.
• Achieved enhanced green emissions with a high solid-state photoluminescence quantum yield (PLQY) of 72.7%.

Conclusions:

• Surface aluminum-based polymerization is an effective strategy to prevent aggregation and enhance luminescence in carbon nanodots.
• The developed CDs show significant potential for applications in solid-state light-emitting devices.
• This approach offers a pathway to robust and efficient solid-state carbon nanodot-based emitters.