Method for producing quantum dot

A method for producing a quantum dot, comprising:

• a washing step of washing a quantum dot by using an organic solvent capable of dissolving an impurity contained in a dispersion containing the quantum dot;
• and
• a surface-protecting step of adding a ligand composed of a phosphorus compound represented by the following general formula (1) or the following general formula (2) to a dispersion of a washed quantum dot to protect a surface of the quantum dot with the ligand,
• wherein R1, R2, and R3 represent a hydrogen atom, a hydroxy group, an alkyl group, a cycloalkyl group, an aryl group, a heteroaryl group, an aralkyl group, a heteroaralkyl group, an alkoxy group, or a thioalkoxy group, and R1, R2, and R3 may be the same groups or different groups,
• wherein R4, R5, R6, R7, and R8 represent a hydrogen atom, a hydroxy group, an alkyl group, a cycloalkyl group, an aryl group, a heteroaryl group, an aralkyl group, a heteroaralkyl group, an alkoxy group, or a thioalkoxy group;
• R4, R5, R6, R7, and R8 may be the same groups or different groups;
• when a plurality of R8 are present, these may be the same groups or different groups;
• A represents an alkylene group, a cycloalkylene group, an arylene group, an alkoxylene group, or a thioalkoxylene group;
• and “n” represents an integer of 0 to 3.