Synthesis of CsPbBr₃ in Micro Total Reaction System: Fast Operation Space Mapping and Subsecond Growth Process...

Area of Science:

• Materials Science
• Nanotechnology
• Chemical Engineering

Background:

• Lead halide perovskite nanocrystals (LHP NCs) exhibit rapid kinetics and instability, complicating growth studies and applications.
• Conventional synthesis methods lack real-time growth process information.

Purpose of the Study:

• To design and implement a micro Total Reaction System (μTRS) for precise and stable synthesis of LHP NCs.
• To enable real-time monitoring of nanocrystal growth kinetics.
• To achieve automated, closed-loop synthesis systems.

Main Methods:

• Development of a micro Total Reaction System (μTRS) with remote control, online detection, and rapid data analysis.
• Utilizing the μTRS to sample photoluminescence during CsPbBr₃ nanocrystal growth via ligand-assisted reprecipitation.
• Real-time data acquisition and processing for operational space mapping.

Main Results:

• Successful synthesis and detection of CsPbBr₃ nanocrystals with an emission range of 435-492 nm.
• Achieved the record for the smallest CsPbBr₃ nanocrystals synthesized directly from precursors.
• Demonstrated the capability for automated closed-loop synthesis and rapid mapping of the operational space.

Conclusions:

• The μTRS provides unprecedented real-time insights into LHP NC growth kinetics.
• This system facilitates the development of highly controlled and potentially autonomous nanocrystal synthesis.
• The generated dataset supports the design of advanced microreaction systems for nanocrystal fabrication.