Semiconductor nanoparticle composite, and dispersion liquid, composition and cured film thereof

The present invention relates to a semiconductor nanoparticle composite in which two or more types of ligands including a ligand I and a ligand II are coordinated to the surface of semiconductor nanoparticles, the ligands being an organic ligand including an organic group and a coordinating group, the ligand I being a mercaptocarboxylic acid represented by general formula (1), and the ligand II being a mercaptocarboxylic acid represented by general formula (2). The molar fraction of the ligand I in the ligand is 0.2 mol%-35.0 mol%, and the general formula (1) is HS-X-(COOH) n (1), in the general formula (1), X represents (n + 1) valence alkyl, and n represents a natural number from 1 to 3. According to the present invention, it is possible to provide a semiconductor nanoparticle composite that can be dispersed in a high mass fraction in a polar dispersion medium while maintaining a high fluorescence quantum efficiency (QY) of semiconductor nanoparticles. 本发明涉及一种半导体纳米粒子复合体，其为在半导体纳米粒子的表面配位有包含配体I和配体II的2种以上的配体的半导