Method for preparing organic electronic device
The present application relates to a method for preparing an organic electronic device, and the organic electronic device prepared by the same, the method for preparing an organic electronic device can improve flatness and adhesion of an organic layer in a process of sealing an organic electronic element to effectively block moisture or oxygen from the outside, thereby securing the lifetime of the organic electronic device.
1. A method for preparing an organic electronic device in which printed patterns of an encapsulating composition are formed on a substrate on which an organic electronic element is formed, the method comprising:
forming two or more primary printed patterns of the encapsulating composition such that they are extended in one direction, spaced apart from each other, and have a predetermined pitch; and
forming two or more secondary printed patterns of the encapsulating composition such that they are extended in the one direction, spaced apart from each other, and alternately disposed with the primary printed patterns,
wherein the primary printed patterns and the secondary printed patterns of the encapsulating composition are formed on the organic electronic element.
2. The method for preparing an organic electronic device according to claim 1 , wherein each of the primary printed patterns or the secondary printed patterns has a width in a range of 2 to 150 mm.
3. The method for preparing an organic electronic device according to claim 1 , wherein the step of forming the primary or the step of forming the secondary printed patterns proceeds with inkjet printing, gravure coating, spin coating, screen printing or reverse offset coating.
4. The method for preparing an organic electronic device according to claim 1 , wherein the primary or secondary printed patterns are formed by inkjet printing and the inkjet printing has a printing resolution range of 50 dpi to 1000 dpi.
5. The method for preparing an organic electronic device according to claim 1 , wherein each of the primary printed patterns or the secondary printed patterns has a thickness of 2 to 25 μm.
6. The method for preparing an organic electronic device according to claim 1 , further comprising a step of planarizing the encapsulating composition.
7. The method for preparing an organic electronic device according to claim 1 , further comprising a step of irradiating the encapsulating composition with light to form the cured encapsulating composition.
8. The method for preparing an organic electronic device according to claim 1 , further comprising a step of forming the organic electronic element by forming a first electrode layer on the substrate, an organic material layer comprising at least a light emitting layer on the first electrode layer, and a second electrode layer on the organic material layer, before forming the printed pattern with the encapsulating composition.
9. The method for preparing an organic electronic device according to claim 8 , further comprising a step of forming a protective layer on the second electrode layer.
10. The method for preparing an organic electronic device according to claim 7 , further comprising a step of forming an inorganic layer on the cured encapsulating composition.
11. The method for preparing an organic electronic device according to claim 1 , wherein the encapsulating composition comprises a curable compound.
12. The method for preparing an organic electronic device according to claim 11 , wherein the curable compound comprises at least one or more curable functional groups.
13. The method for preparing an organic electronic device according to claim 11 , wherein the curable compound comprises 5 to 50 parts by weight of a curable compound having a cyclic structure in its molecular structure and 25 to 80 parts by weight of a vinyl ether curable compound.
14. The method for preparing an organic electronic device according to claim 13 , wherein the curable compound further comprises a curable compound having an oxetane group.
15. The method for preparing an organic electronic device according to claim 14 , wherein the curable compound having an oxetane group is comprised in an amount of 5 to 90 parts by weight relative to 100 parts by weight of the vinyl ether curable compound.
16. The method for preparing an organic electronic device according to claim 11 , wherein the composition further comprises a surfactant.
17. The method for preparing an organic electronic device according to claim 11 , wherein the composition further comprises a photoinitiator.
18. The method for preparing an organic electronic device according to claim 11 , wherein the composition further comprises a photosensitizer.
19. An organic electronic device prepared by the method for preparing an organic electronic device according to claim 1 .