an anode;

a cathode; and

a light emitting layer provided between the anode and the cathode,

wherein a first organic material layer comprising a composition which comprises a compound of the following Chemical Formula 1 or a cured product thereof is comprised between the light emitting layer and the anode, and

a second organic material layer comprising a composition which comprises a copolymer of the following Chemical Formula 2 or a cured product thereof is comprised between the first organic material layer and the light emitting layer:

in Chemical Formula 1,

L and L1 to L4 are the same as or different from each other, and are each independently a substituted or unsubstituted arylene group,

L5 and L6 are the same as or different from each other, and are each independently a direct bond; or a substituted or unsubstituted arylene group,

Az1 and Az2 are the same as or different from each other, and are each independently a substituted or unsubstituted aryl group; or a substituted or unsubstituted heteroaryl group,

R1 to R4 are the same as or different from each other, and are each independently hydrogen; deuterium; a substituted or unsubstituted alkyl group; a substituted or unsubstituted alkoxy group; a substituted or unsubstituted aryl group; or a substituted or unsubstituted heteroaryl group,

X1 to X4 are the same as or different from each other, and are each independently —(U101)w; or -M-Q, and two or more of X1 to X4 are -M-Q,

U101 is hydrogen; deuterium; a halogen group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted alkoxy group; a substituted or unsubstituted aryl group; or a substituted or unsubstituted aryloxy group,

w is an integer from 0 to 5, and when w is 2 or higher, each U101 is the same as or different from each other,

M is O or S,

Q is a curable group,

F is fluoro,

m1 and m2 are the same as or different from each other, and each independently an integer from 1 to 5,

n5 and n6 are the same as or different from each other, and each independently an integer from 0 to 2,

n1 and n4 are the same as or different from each other, and each independently an integer from 0 to 4,

n2 and n3 are the same as or different from each other, and each independently an integer from 0 to 3,

when n5 and n6 are each 2, each L5 and L6 is the same as or different from each other, respectively, and

when n1 to n4 are each 2 or higher, each R1 to R4 is the same as or different from each other, respectively,

in Chemical Formula 2,

A is a monomer unit including at least one triarylamine group,

B′ is a monomer unit having at least three binding points in a copolymer,

C′ is an aromatic monomer unit or a deuterated analog thereof,

E is each independently selected from the group consisting of hydrogen; deuterium; a halogen group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted germanium group; a substituted or unsubstituted aryl group; a substituted or unsubstituted arylamino group; a substituted or unsubstituted siloxane group; and a substituted or unsubstituted curable group, and

a, b and c are a mole fraction, a+b+c=1, a≠0, and b≠0.