Substrate for organic electronic device
The present application relates to a substrate for an organic electronic device (OED), an organic electronic device, a method of manufacturing the substrate or OED and lighting device. The substrate for an OED of the present application may be improved in durability by preventing penetration of external materials such as moisture or oxygen, and thus an OED having excellent light extraction efficiency may be formed. Also, since the substrate may be stably attached to an encapsulating structure sealing the OED, the device may have excellent durability with respect to abrasion of an electrode layer or pressure applied from an external environment. In addition, a surface hardness of an external terminal of the OED may be maintained at a suitable level.
1. A substrate for an organic electronic device, comprising:
a substrate layer;
an optical functional layer formed on the substrate layer and having a smaller projection area than the substrate layer;
an electrode layer having a larger projection area than the optical functional layer, and formed on both of the top of the optical functional layer and the top of the substrate layer on which the optical functional layer is not formed; and
a conductive material in electrical contact with both of the electrode layer formed on the top of the optical functional layer and the electrode layer formed on the top of the substrate layer on which the optical functional layer is not formed,
wherein the optical functional layer is sealed by the substrate layer, the electrode layer and the conductive material,
wherein the optical functional layer comprises a matrix material, and
wherein the matrix material comprises polysiloxane, polyamic acid or polyimide.
2. The substrate for an organic electronic device of claim 1 , wherein a ratio (A/B) of a projection area (A) of the electrode layer and a projection area (B) of the optical functional layer is 1.04 or more.
3. The substrate for an organic electronic device of claim 1 , wherein the substrate layer is a light-transmitting substrate.
4. The substrate for an organic electronic device of claim 1 , wherein the conductive material comprises at least one selected from the group consisting of silver (Ag), copper (Cu), nickel (Ni), molybdenum (Mo) and aluminum (Al).
5. The substrate for an organic electronic device of claim 1 , wherein the electrode layer is a hole injection electrode layer or an electron injection electrode layer.
6. The substrate for an organic electronic device of claim 1 , wherein the optical functional layer is a light-scattering layer.
7. The substrate for an organic electronic device of claim 6 , wherein the light-scattering layer comprises light-scattering particles having a different refractive index from the matrix material.
8. The substrate for an organic electronic device of claim 7 , wherein the light-scattering particles have a refractive index of 1.0 to 3.5.
9. The substrate for an organic electronic device of claim 6 , wherein the light-scattering layer has an uneven structure.
10. The substrate for an organic electronic device of claim 1 , wherein the optical functional layer comprises the light-scattering layer and a planarized layer formed on the top of the light-scattering layer.
11. The substrate for an organic electronic device of claim 10 , wherein the planarized layer has a refractive index of 1.7 or more.
12. An organic electronic device, comprising:
the substrate for an organic electronic device of claim 1 ;
an organic layer comprising an emitting layer, which is formed on the electrode layer of the substrate; and
a second electrode layer formed on the organic layer.
13. The organic electronic device of claim 12 , wherein a difference (B-C) between a length (B) of a region in which the optical functional layer is formed and a length (C) of the emitting region of the emitting layer of the substrate is 10 μm to 2 mm.
14. The organic electronic device of claim 12 , further comprising an encapsulating structure for protecting the organic layer and the second electrode layer, and
wherein the encapsulating structure is attached to the top surface of the electrode layer of the substrate, which the optical functional layer is not formed in below.
15. The organic electronic device of claim 14 , wherein the encapsulating structure is a glass can or a metal can, or a film covering entire surfaces of the organic layer and the second electrode layer.
16. Lighting device comprising the organic electronic device of claim 12 .