| abstract |
The disclosed method for preparing a quantum dot thin film includes a first solution comprising a group III-V compound, a quantum dot bonded to a first ligand including an alkyl chain, and a nonpolar solvent, a fluorine-containing compound and a polar solvent. Mixing the two solutions to remove the first ligand from the quantum dots, the quantum dots from which the first ligand has been removed to the polar solvent layer of the mixed solution of the first solution and the second solution, and the phase-separated nonpolar solvent layer Isolating, coating a quantum dot ink including the quantum dots from which the first ligand is removed, to form a preliminary thin film, and providing a ligand forming material to the preliminary thin film, thereby providing a second ligand on the surface of the quantum dot. Combining the; |