Self-quenching-resistant solid-state carbon dots for mechanism and applications

Area of Science:

• Materials Science
• Nanotechnology
• Photochemistry

Background:

• Solid-state carbon dots (SCDs) are gaining attention for their stability and eco-friendliness, contrasting with solution-based carbon dots (CDs).
• Aggregation-induced quenching (ACQ) due to resonance energy transfer and π-π interactions hinders SCD performance.
• Research on SCDs, particularly suppressing ACQ and understanding luminescence mechanisms, is less extensive than for CDs.

Purpose of the Study:

• To review recent advancements in suppressing ACQ in carbon dots (CDs).
• To explore mechanisms enabling luminescence in solid-state carbon dots (SCDs).
• To outline the applications of SCDs in luminescent devices, anti-counterfeiting, and detection.

Main Methods:

• Literature review of publications from the past 5 years focusing on ACQ suppression and SCD luminescence.
• Analysis of mechanisms responsible for photoluminescence in SCDs.
• Compilation and categorization of SCD applications.

Main Results:

• Identified strategies to mitigate ACQ phenomena in CDs, enhancing their solid-state luminescence.
• Elucidated mechanisms contributing to photoluminescence in SCDs.
• Cataloged diverse applications of SCDs, including advanced luminescent devices and sensitive detection methods.

Conclusions:

• SCDs show significant promise due to their inherent advantages, but ACQ remains a key challenge.
• Understanding luminescence mechanisms is crucial for designing high-performance SCDs.
• Further research is needed to address current challenges and unlock the full potential of SCDs.