Tcl Technology Group Corporation

Huijun Qin

Yixing Yang

A composite material includes a light-emitting quantum dot, and a first ligand and a second ligand bound on a surface of the light-emitting quantum dot. The first ligand includes an oil-soluble organic ligand, and the second ligand including a halogen ligand or a water-soluble ligand.

Composite material and quantum dot light emitting diode

Provided is a quantum dot surface ligand exchange method. The method comprises the steps: pre-treating proton-containing ligands using a deprotonating agent to obtain deprotonated ligands; mixing a pre-prepared quantum dot solution having original ligands with the deprotonated ligands, after stirring for a predetermined amount of time at room temperature, a ligand exchange reaction occurring, and after washing, obtaining a quantum dot having the deprotonated ligands on the surface. The quantum dot ligand exchange method has a high reaction rate and is easy to operate; after the ligand exchange, the deprotonated ligands firmly bind to cations on the surface of the quantum dot, and after the ligand exchange, the quantum dot provides a stable colloidal solution, and has good solubility and high luminous efficiency.

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Huizhou, China

Huijun Qin