An organic light-emitting diode device comprising: a first substrate; an internal light extraction layer disposed on the first substrate; a first electrode disposed on the internal light extraction layer; an organic light-emitting layer disposed on the first electrode; and a second electrode formed on the organic light-emitting layer, wherein the internal light extraction layer has corrugations formed on a surface thereof, the second electrode has a corrugated structure on a surface thereof, due to the corrugations of the internal light extraction layer sequentially transferred to the first electrode, the light-emitting layer, and the second electrode, the corrugated structure has a plurality of convex portions and a plurality of concave portions alternating with the plurality of convex portions, an aspect ratio (depth/pitch) of a pitch between the adjacent convex portions to a depth of the concave portions ranges from 0.1 to 7, and the internal light extraction layer comprises: a matrix layer disposed on the first substrate, formed from metal oxide, and having cracks formed therein, a number of scattering particles dispersed in the matrix layer and formed from a material having a refractive index different from a refractive index of the metal oxide, and a filling layer disposed on a surface of the matrix layer to fill the cracks to reduce a surface roughness of the matrix layer, and the corrugations formed in a surface of the filling layer having shapes corresponding to shapes of the number of scattering particles and clusters of scattering particles among the number of scattering particles transferred thereto. a first substrate; an internal light extraction layer disposed on the first substrate; a first electrode disposed on the internal light extraction layer; an organic light-emitting layer disposed on the first electrode; and a second electrode formed on the organic light-emitting layer, wherein the internal light extraction layer has corrugations formed on a surface thereof, the second electrode has a corrugated structure on a surface thereof, due to the corrugations of the internal light extraction layer sequentially transferred to the first electrode, the light-emitting layer, and the second electrode, the corrugated structure has a plurality of convex portions and a plurality of concave portions alternating with the plurality of convex portions, an aspect ratio (depth/pitch) of a pitch between the adjacent convex portions to a depth of the concave portions ranges from 0.1 to 7, and the internal light extraction layer comprises: a matrix layer disposed on the first substrate, formed from metal oxide, and having cracks formed therein, a number of scattering particles dispersed in the matrix layer and formed from a material having a refractive index different from a refractive index of the metal oxide, and a filling layer disposed on a surface of the matrix layer to fill the cracks to reduce a surface roughness of the matrix layer, and a matrix layer disposed on the first substrate, formed from metal oxide, and having cracks formed therein, a number of scattering particles dispersed in the matrix layer and formed from a material having a refractive index different from a refractive index of the metal oxide, and a filling layer disposed on a surface of the matrix layer to fill the cracks to reduce a surface roughness of the matrix layer, and the corrugations formed in a surface of the filling layer having shapes corresponding to shapes of the number of scattering particles and clusters of scattering particles among the number of scattering particles transferred thereto.