Curable composition, cured layer using the composition, color filter including the cured layer and display device including the color filter
A curable composition, a cured layer manufactured using the curable composition, a color filter including the cured layer, and a display device including the color filter, the curable composition including a quantum dot surface-modified with a first ligand and a second ligand having a structure different than the first ligand; and a polymerizable compound is provided. The first ligand is a silsesquioxane-based thiol ligand.
1 . A curable composition, comprising:
a quantum dot surface-modified with a first ligand and a second ligand having a structure different than the first ligand; and
a polymerizable compound,
wherein the first ligand is a silsesquioxane-based thiol ligand and the second ligand is represented by Chemical Formula 2, and
wherein the first ligand and the second ligand are each independently attached directly to a surface of the quantum dot;
wherein, in Chemical Formula 2,
R 1 is a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C3 to C20 cycloalkyl group, a substituted or unsubstituted C6 to C20 aryl group, or a combination thereof,
L 2 and L 3 are each independently a substituted or unsubstituted C1 to C20 alkylene group, a substituted or unsubstituted C3 to C20 cycloalkylene group, a substituted or unsubstituted C6 to C20 arylene group, or a combination thereof, and
n and m are each independently an integer from 0 to 100, and n+m≠0.
2 . The curable composition of claim 1 , wherein
the silsesquioxane-based thiol ligand is a cage silsesquioxane-based thiol ligand.
3 . The curable composition of claim 1 , wherein
the silsesquioxane-based thiol ligand comprises a structural unit represented by Chemical Formula 1:
wherein, in Chemical Formula 1,
L 1 is an ether linking group, a sulfide linking group, a substituted or unsubstituted C1 to C20 alkylene group, a substituted or unsubstituted C3 to C20 cycloalkylene group, a substituted or unsubstituted C6 to C20 arylene group, or a combination thereof.
4 . The curable composition of claim 3 , wherein
the first ligand is represented by Chemical Formula 1-1:
wherein, in Chemical Formula 1-1,
L 1 is an ether linking group, a sulfide linking group, a substituted or unsubstituted C1 to C20 alkylene group, a substituted or unsubstituted C3 to C20 cycloalkylene group, a substituted or unsubstituted C6 to C20 arylene group, or a combination thereof, and
R 2 to R 8 are each independently a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C3 to C20 cycloalkyl group, a substituted or unsubstituted C6 to C20 aryl group, or a combination thereof.
5 . The curable composition of claim 1 , wherein
a content of the first ligand on the surface of the quantum dot is less than or equal to a content of the second ligand.
6 . The curable composition of claim 1 , wherein
a weight ratio of the first ligand to the second ligand on the surface of the quantum dot is about 1:9 to about 5:5.
7 . The curable composition of claim 1 , wherein
the second ligand is a thiol ligand having a structure different from that of the first ligand.
8 . The curable composition of claim 1 , wherein
in Chemical Formula 2, R 1 is a substituted or unsubstituted C6 to C20 aryl group.
9 . The curable composition of claim 1 , wherein
in Chemical Formula 2, R 1 is a substituted or unsubstituted C1 to C20 alkyl group, and L 2 and L 3 are the same.
10 . The curable composition of claim 1 , wherein
in Chemical Formula 2,
R 1 is a substituted or unsubstituted C1 to C20 alkyl group, and
L 2 and L 3 are different from each other.
11 . The curable composition of claim 1 , wherein
the curable composition is a solvent-free curable composition.
12 . The curable composition of claim 11 , wherein
the solvent-free curable composition comprises
about 5 wt % to about 60 wt % of the modified quantum dot surface; and
about 40 wt % to about 95 wt % of the polymerizable compound,
based on the total amount of the solvent-free curable composition.
13 . The curable composition of claim 1 , wherein
the curable composition further comprises a polymerization initiator, a light diffusing agent, a polymerization inhibitor, or a combination thereof.
14 . The curable composition of claim 13 , wherein
the light diffusing agent comprises barium sulfate, calcium carbonate, titanium dioxide, zirconia, or a combination thereof.
15 . The curable composition of claim 1 , wherein
the curable composition further comprises a solvent.
16 . The curable composition of claim 15 , wherein
the curable composition comprises about 1 wt % to about 40 wt % of the modified quantum dot surface; about 1 wt % to about 20 wt % of the polymerizable compound; and about 40 wt % to about 80 wt % of the solvent based on the total weight of the curable composition.
17 . The curable composition of claim 1 , wherein
the curable composition further comprises malonic acid; 3-amino-1,2-propanediol; a silane-based coupling agent; a leveling agent; a fluorine-based surfactant; or a combination thereof.
18 . A cured layer manufactured using the curable composition of claim 1 .
19 . A color filter comprising the cured layer of claim 18 .
20 . A display device comprising the color filter of claim 19 .