Layered structures and quantum dot sheets and electronic devices including the same

A quantum dot sheet comprising:

• a photoconversion layer comprising a polymer matrix and a plurality of quantum dots dispersed in the polymer matrix;
• and
• a layered structure comprising a first layer comprising a polymerization product of a monomer combination comprising a first monomer having at least two thiol groups at its terminal end and a second monomer having at least two carbon-carbon unsaturated bond-containing groups at its terminal end,
• wherein the first monomer comprises a first thiol compound represented by Chemical Formula 1-1 comprising a thioglycolate moiety and a second thiol represented by Chemical Formula 1-2:
• wherein in Chemical Formula 1-1,
• L1 is a carbon atom, a substituted or unsubstituted C1 to C30 alkylene group, a substituted or unsubstituted C6 to C30 cycloalkylene group, a substituted or unsubstituted C6 to C30 arylene group, a substituted or unsubstituted C3 to C30 heteroarylene group, or a substituted or unsubstituted C3 to C30 heterocycloalkylene group,
• Y1 is a single bond or a substituted or unsubstituted C1 to C4 alkylene group,
• R1 is same or different and each independently hydrogen or C1 to C3 alkyl group,
• n is an integer of 2 to 4,
• L1 has a valence of at least n,
• wherein in Chemical Formula 1-2,
• L1 is a carbon atom, a substituted or unsubstituted C1 to C30 alkylene group, a substituted or unsubstituted C6 to C30 cycloalkylene group, a substituted or unsubstituted C6 to C30 arylene group, a substituted or unsubstituted C3 to C30 heteroarylene group, or a substituted or unsubstituted C3 to C30 heterocycloalkylene group,
• Y2 is a single bond;
• —(OCH2CH2)m— (wherein m is an integer of 1 to 10), sulfonyl (—S(═O)2—), carbonyl (—C(═O)—), ether (—O—), sulfide (—S—), sulfoxide (—S(═O)—), ester (—C(═O)O—), amide (—C(═O)NR—) (wherein R is hydrogen or a C1 to C10 linear or branched alkyl group), —RB— [wherein R is a C1 to C20 substituted or unsubstituted divalent linear or branched alkylene group, a C1 to C20 substituted or unsubstituted divalent linear or branched alkylene group having at least one methylene replaced with sulfonyl (—S(═O)2—), carbonyl (—C(═O)—), ether (—O—), sulfide (—S—), sulfoxide (—S(═O)—), ester (—C(═O)O—), amide (—C(═O)NR—) (wherein R is hydrogen or a C1 to C10 linear or branched alkyl group), or a combination thereof, or —(OCH2CH2)m— (wherein m is an integer of 1 to 10) and B is sulfonyl (—S(═O)2—), carbonyl (—C(═O)—), ether (—O—), sulfide (—S—), sulfoxide (—S(═O)—), ester (—C(═O)O—), amide (—C(═O)NR—) (wherein R is hydrogen or a C1 to C10 linear or branched alkyl group), or a combination thereof], or a combination thereof,
• A is a C2 to C4 divalent alkylene group,
• n is an integer of 2 to 4,
• L1 has a valence of at least n;
• and
• the second monomer comprises an ene compound represented by Chemical Formula 2:
• wherein in Chemical Formula 2,
• X is —CR═CR2 or —C≡CR (wherein R is each independently hydrogen or a C1 to C3 alkyl group),
• R2 is selected from hydrogen;
• a substituted or unsubstituted C1 to C30 linear or branched alkyl group;
• a substituted or unsubstituted C6 to C30 aryl group;
• a substituted or unsubstituted C3 to C30 heteroaryl group;
• a substituted or unsubstituted C3 to C30 cycloalkyl group;
• a substituted or unsubstituted C3 to C30 heterocycloalkyl group;
• a C1 to C10 alkoxy group;
• a hydroxy group;
• —NH2;
• a substituted or unsubstituted alkyl amine group (—NRR′, wherein R and R′ are independently hydrogen or a C1 to C30 linear or branched alkyl group provided that both of R and R′ cannot be hydrogen at the same time);
• an isocyanate group;
• a halogen;
• —ROR′ (wherein R is a substituted or unsubstituted C1 to C20 alkylene group and R′ is hydrogen or a C1 to C20 linear or branched alkyl group);
• an acyl halide (—RC(═O)X, wherein R is a substituted or unsubstituted alkylene group and X is a halogen);
• —C(═O)OR′ (wherein R′ is hydrogen or a C1 to C20 linear or branched alkyl group);
• —CN;
• —C(═O)ONRR′ (wherein R and R′ are independently hydrogen or a C1 to C20 linear or branched alkyl group);
• or a combination thereof,
• L2 is a carbon atom, a substituted or unsubstituted C1 to C30 alkylene group, a substituted or unsubstituted C6 to C30 cycloalkylene group, a substituted or unsubstituted C6 to C30 arylene group, a substituted or unsubstituted C3 to C30 heteroarylene group, or a substituted or unsubstituted C3 to C30 heterocycloalkylene group,
• Y2 is a single bond;
• a substituted or unsubstituted C1 to C30 alkylene group;
• a substituted or unsubstituted C2 to C30 alkenylene group;
• or a C1 to C30 alkylene group or a C2 to C30 alkenylene group wherein at least one methylene (—CH2—) group is replaced by sulfonyl (—S(═O)2—), carbonyl (—C(═O)—), ether (—O—), sulfide (—S—), sulfoxide (—S(═O)—), ester (—C(═O)O—), amide (—C(═O)NR—) (wherein R is hydrogen or a C1 to C10 linear or branched alkyl group), imine (—NR—) (wherein R is hydrogen or a C1 to C10 linear or branched alkyl group), or a combination thereof,
• n is an integer of 1 or more,
• k3 is an integer of 0 or more,
• k4 is an integer of 1 or more, and
• the sum of n and k4 is an integer of 3 or more,
• provided that n does not exceed the valence of Y2, and
• provided that the sum of k3 and k4 does not exceed the valence of L2, and
• wherein the layered structure is disposed on at least one surface of the photoconversion layer, wherein the at least one surface of the photoconversion layer faces a surface of the first layer of the layered structure.