Encapsulation film and organic electronic device comprising the same
Provided are an encapsulation film, an organic electronic device comprising the same, and a method of manufacturing the organic electronic device. When the organic electronic device is encapsulated using the encapsulation film, an excellent moisture barrier property may be realized, and as reflection or scattering of light is prevented by absorbing and blocking internal or external light, external defects of the organic electronic device may be prevented.
1. An organic electronic device, comprising:
a substrate;
an organic electronic element comprising a transparent electrode layer present on the substrate, an organic layer present on the transparent electrode layer and comprising at least an emitting layer, and a reflective electrode layer present on the organic layer; and
an encapsulation film encapsulating an entire surface of the organic electronic element, and comprising a light absorbing region having a surface resistance of 10 11 Ω/cm 2 or more,
wherein the encapsulation film comprises an encapsulation resin and a light absorbing material.
2. The organic electronic device according to claim 1 , wherein the light absorbing region is formed in at least one outer peripheral part of the encapsulation film.
3. The organic electronic device according to claim 1 , wherein the light absorbing region is formed in an entire area of the encapsulation film.
4. The organic electronic device according to claim 1 , wherein the encapsulation film further comprises a metal layer.
5. The organic electronic device according to claim 4 , wherein the metal layer has a thermal conductivity of 50 W/mK or more.
6. The organic electronic device according to claim 4 , wherein the metal layer has a reflectance of 15 to 90% in Specular Component Included SCI measurement, or 15 to 80% in Specular Component Excluded SCE measurement.
7. A method of manufacturing the organic electronic device of claim 1 , comprising:
forming the organic electronic element comprising a transparent electrode layer, an organic layer present on the transparent electrode layer and comprising at least an emitting layer and a reflective electrode layer present on the organic layer, on the substrate; and
applying the encapsulation film to the substrate on which the organic electronic element is formed to encapsulate an entire surface of the organic electronic element.
8. The organic electronic device according to claim 1 , wherein the encapsulation film has a haze of 40% to 90%.
9. The organic electronic device according to claim 1 , wherein the encapsulation resin comprises an acrylic resin, an epoxy resin, a silicone resin, a fluorine resin, a styrene resin, a polyolefin resin, a thermoplastic elastomer, a polyoxyalkylene resin, a polyester resin, a polyvinylchloride resin, a polycarbonate resin, a polyphenylenesulfide resin, a polyamide resin or a mixture thereof.
10. The organic electronic device according to claim 1 , wherein the encapsulation resin comprises a curable resin.
11. The organic electronic device according to claim 10 , wherein the curable resin is a heat-curable resin.
12. The organic electronic device according to claim 10 , wherein the curable resin comprises at least one curable functional group selected from a glycidyl group, an isocyanate group, a hydroxyl group, a carboxyl group, an amide group, an epoxide group, a cyclic ether group, a sulfide group, an acetal group, and a lactone group.
13. The organic electronic device according to claim 10 , wherein the curable resin is an epoxy resin comprising a cyclic structure in a molecular structure.
14. The organic electronic device according to claim 10 , wherein the curable resin is a silane-modified epoxy resin.
15. The organic electronic device according to claim 1 , wherein the light absorbing material is a non-conductive material.
16. The organic electronic device according to claim 1 , wherein the light absorbing material is at least one selected from the group consisting of carbon black, carbon nanotube, fluorene, a phthalocyanine derivative, a porphyrin derivative, and a triphenylamine derivative.
17. The organic electronic device according to claim 1 , wherein, in the encapsulation film, the light absorbing material is comprised at 0.01 to 50 parts by weight with respect to 100 parts by weight of the encapsulation resin.
18. The organic electronic device according to claim 1 , wherein the encapsulation film further comprises a moisture absorbent.
19. The organic electronic device according to claim 18 , wherein the moisture absorbent is at least one selected from the group consisting of P 2 O 5 , Li 2 O, Na 2 O, BaO, CaO, MgO, Li 2 SO 4 , Na 2 SO 4 , CaSO 4 , MgSO 4 , CoSO 4 , Ga 2 (SO 4 ) 3 , Ti(SO 4 ) 2 , NiSO 4 , CaCl 2 , MgCl 2 , SrCl 2 , YCl 3 , CuCl 2 , CsF, TaF 5 , NbF 5 , LiBr, CaBr 2 , CeBr 3 , SeBr 4 , VBr 3 , MgBr 2 , BaI 2 , MgI 2 , Ba(ClO 4 ) 2 and Mg(ClO 4 ) 2 .
20. The organic electronic device according to claim 1 , wherein the encapsulation film comprises:
a light absorbing layer comprising the light absorbing region; and
a moisture barrier layer.
21. The organic electronic device according to claim 20 , wherein the moisture barrier layer has a water vapor transmission rate (WVTR) of 50 g/m 2 ·day or less.