Quantum dot-containing composition, wavelength conversion member, and method for manufacturing quantum dot-containing composition

A method for manufacturing a quantum dot-containing composition comprising a quantum dot that emits fluorescence by excitation light, the method comprising:

• a surface treatment step of heating and mixing a solution containing a dispersed quantum dot in which ZnS is formed in an outermost shell, a ligand having a substituent capable of forming a siloxane bond and having a thiol group, and a solution containing a zinc precursor and a sulfur precursor, to coordinate the ligand while forming an additional ZnS on an outermost surface of the quantum dot;
• a surface-coating layer formation step of performing a reaction between the substituent capable of forming a siloxane bond and a compound capable of forming a siloxane bond and having a reactive substituent, to form a surface-coating layer having a siloxane bond, after the surface treatment step;
• and
• a mixing step of adding and mixing a polymerizable polymer composition containing a substituent polymerizable with the reactive substituent, after the surface-coating layer formation step.