Semiconductor nanoparticle complex, semiconductor nanoparticle complex dispersion liquid, semiconductor nanoparticle complex composition, semiconductor nanoparticle complex cured film, and purification method for semiconductor nanoparticle complex

A semiconductor nanoparticle complex composition comprising a semiconductor nanoparticle complex, the semiconductor nanoparticle complex comprising a ligand coordinated to a surface of a semiconductor nanoparticle, wherein

• the semiconductor nanoparticle includes In and P, the ligand includes a mercapto fatty acid ester represented by the following general formula (1), the mercapto fatty acid ester has an SP value of 9.30 or less,
• an amount of the mercapto fatty acid ester represented by the general formula (1) contained in the entire ligand is 40.0 mol % or more, and
• a mass ratio of the ligand to the semiconductor nanoparticle (ligand/semiconductor nanoparticle) is 0.50 or less:
• general formula (1):
• HS—R1—COOR2 (1)
• (where R1 is a C1-11 hydrocarbon group and R2 is a C1-20 hydrocarbon group),
• wherein the semiconductor nanoparticle complex is dispersed in a dispersion medium, wherein the dispersion medium is a monomer or a prepolymer.