Fluorine-Shelled Quantum Dots for Stable High-Yield Emission

The patent applies preliminary action by performing hydrofluoric acid treatment on the core surface before shell formation. This pre-treatment removes surface defects and prepares the core for subsequent shell deposition, ensuring high chemical stability and quantum yield. The core is pre-modified with fluorine atoms that facilitate controlled shell growth and prevent aggregation during the manufacturing process.

The patent uses hydrofluoric acid as an intermediary substance that mediates between the core and shell formation processes. The acid treatment creates a controlled surface environment that enables uniform shell deposition while maintaining core integrity. This intermediary treatment step acts as a bridge that ensures optimal interface between core and shell, resolving the complexity by providing a standardized preparation protocol.

The patent implements continuous useful action by performing shell formation in a single continuous reaction process rather than multiple discrete steps. The sulfur precursor and metal precursors are introduced simultaneously or in continuous sequence, allowing uninterrupted shell growth on the pre-treated core surface. This continuous process maintains high luminous efficiency while minimizing production time by eliminating intermediate processing steps.

The patent applies parameter changes by optimizing reaction conditions such as temperature, precursor concentrations, and reaction time to achieve rapid shell formation. By carefully controlling these parameters, the shell forms uniformly and quickly on the core surface, enhancing quantum yield and color reproducibility without significantly extending production time. The reaction temperature and precursor ratios are tuned to maximize deposition rate while maintaining quality.