Patent #: US20260117119A1 / CN115627168B / WO2024078624A1

Inventor: Liang Li, Mengda He, Qinggang Zhang, Weiyu Wei, Long Kong

Highlights

• This patent describes densely oxide-coated fluorescent composite particles containing multiple fluorescent nanocrystals, designed to combine high stability with small particle size and controlled morphology.
• The particles address a key bottleneck in quantum-dot technologies: protecting fragile nanocrystals while retaining solution processability for applications such as micro-LED color conversion, inks, and bioimaging platforms.

Summary

This patent publication protects a fluorescent composite particle platform in which fluorescent nanocrystals are tightly encapsulated by an oxide material. The invention focuses on the balance between optical performance, environmental protection, and particle-level processability. By controlling particle size, density, surface area, and the ratio between fluorescent material and oxide, the method creates particles that are more robust than conventional nanocrystals while remaining small enough for advanced device processing. The invention is closely aligned with Professor Liang Li’s broader innovation pathway: moving quantum dots from fragile laboratory emitters toward ceramic-stable, printable functional materials.

Patent citation: L. Li, M. He, Q. Zhang, W. Wei, and L. Kong, “Fluorescent composite particle and preparation method therefor,” U.S. Patent Application US20260117119A1.