Organic electroluminescent device and method for fabricating same
View Patent ↗An organic EL device including a stacked structure having an organic luminescent layer positioned between an anode and a cathode; and a sealing can having a desiccant-containing layer on its inner surface. The desiccant in the desiccant-containing layer provides an excellent long-term moisture resistance to the organic EL device, thereby generating no or a few dark spots thereon.
1. An organic EL device, comprising;
a transparent substrate;
a stacked structure formed on the transparent substrate, wherein the stacked structure includes an anode, a cathode and at least one organic EL layer sandwiched between the anode and the cathode;
a sealing can for encapsulating the stacked structure together with the transparent substrate;
a desiccant-containing layer formed on a inner surface of the sealing can; and
a desiccant-free layer being disposed on at least a part of a surface of the desiccant-containing layer, wherein the desiccant-containing layer comprises resin, and wherein the desiccant-free layer comprises a resin similar to the resin of the desiccant-containing layer.
2. The organic EL device of claim 1 , wherein the resin comprises a photo-curable resin.
3. The organic EL device of claim 1 , wherein the resin is adhesive.
4. The organic EL device of claim 1 , wherein the desiccant-containing layer comprises at least on desiccant selected from the group of phosphorous pentaoxide (P 4 O 10 ), barium oxide (BaO), magnesium oxide (MgO), calcium oxide (CaO), and aluminum oxide (Al 2 O 3 ).
5. The organic EL device of claim 1 , wherein the desiccant-containing layer comprises deliquescent desiccant.
6. The organic EL device of claim 1 , wherein the desiccant-containing layer comprises desiccant dispersed within the desiccant-containing layer.
7. The organic EL device of claim 1 , wherein the desiccant-containing layer comprises a substantially desiccant-free surface.
8. The organic EL device of claim 1 , wherein the desiccant-free layer comprises resin.
9. The organic EL device of claim 1 , wherein the sealing can comprises glass or polymer.