Solventless quantum dot composition, method for producing same, and cured film, color filter, and display device comprising same

A method for preparing a solventless quantum dot composition, comprising:

• (a) synthesizing quantum dots;
• (b) subjecting the quantum dots to primary surface modification with a primary ligand comprising an ethylene glycol structure without separating the quantum dots from a solution containing the quantum dots synthesized therein;
• (c) subjecting the primary surface-modified quantum dots to secondary surface modification with a secondary ligand represented by Formula 1:
• (In Formula 1,
• M is a bivalent to tetravalent metal,
• R1 to R3 are independently hydrogen or a C3 to C70 organic group, and
• n is an integer of 2 to 4)
• (d) obtaining surface-modified quantum dots from a product of step (c);
• and
• (e) dispersing the obtained surface-modified quantum dots in a photopolymerizable monomer,
• further comprising:
• after step (c),
• (f) subjecting the surface-modified quantum dots to tertiary surface modification by adding a C3 to C40 tertiary ligand containing a carboxyl group to the solution,
• wherein the tertiary ligand is represented by Formula 2
• (In Formula 2,
• L is a single bond or selected from the group consisting of substituted or unsubstituted C1 to C20 alkylene groups and substituted or unsubstituted C1 to C20 alkenylene groups,
• A is a single bond or a C1 to C20 alkylene or alkenylene group containing at least one functional group selected from the group consisting of ester (—C(═O)O—), ether (—O—), carbonyl (—C(═O)—), sulfonyl (—SO2—), sulfide (—S—), and sulfoxide (—SO—) groups, and
• R is hydrogen or selected from the group consisting of substituted or unsubstituted C1 to C20 alkyl groups and substituted or unsubstituted C1 to C20 alkenyl groups).