Quantum Dot Ligand Surface Chemistry for Optical Component Compatibility

The patent applies local quality by modifying only the surface of the nanoparticles with ligands while keeping the core nanoparticle structure intact. The ligands are attached specifically to the nanoparticle surface to provide chemical reactivity and miscibility without altering the optical properties of the quantum confined semiconductor core, thus resolving the contradiction between maintaining optical performance and enhancing chemical adaptability.

The patent creates a composite structure by combining quantum confined semiconductor nanoparticles with organic ligands. This composite approach allows the nanoparticle core to maintain its optical properties while the ligand shell provides the necessary chemical reactivity and miscibility, effectively resolving the contradiction between optical performance and chemical versatility.

The patent applies preliminary action by pre-synthesizing ligands with specific functional groups (X-Sp-Z structure) that are designed to attach to nanoparticle surfaces during the nanoparticle formation process or in subsequent simple treatment steps. This preliminary design of the ligand structure simplifies the overall process by eliminating the need for complex post-synthesis surface modification procedures.

The patent utilizes parameter changes by adjusting the ligand structure parameters (X-Sp-Z where X is a nitrogen-containing group, Sp is a spacer group, and Z is a reactive or cyclic group) to achieve desired chemical miscibility. By changing ligand parameters rather than nanoparticle parameters, the patent simplifies the modification process while maintaining nanoparticle optical properties, thus reducing device complexity.