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US 6,737,176 B1Granted
Organic electroluminescent device and method for fabricating same
AssigneeNEC Corporation
InventorsShigeyoshi Otsuki, Shinichi Fukuzawa
Life of this patent
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Abstract
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.
Claims14
An organic EL device comprising:
- a transparent substrate;
- a stacked structure formed on the transparent substrate, the stacked structure including 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 adhesively formed on an inner surface of the sealing can, so that a gap is defined between said desiccant-containing layer and the stacked structure;
- and
- a desiccant-free layer being disposed on at least a part of a surface of said desiccant-containing layer.
3 more elements
An organic EL device comprising:
- a transparent substrate;
- a stacked structure formed on the transparent substrate, the stacked structure including 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;
- and
- a desiccant-containing layer adhesively formed on an inner surface of the sealing can, so that a gap is defined between said desiccant-containing layer and the stacked structure, wherein the gap defines a cavity in the sealing can having a volume of between 1.5 and 10 times larger than a volume defined by the stacked structure.
2 more elements
A method for fabricating an organic EL device comprising the steps of:
- forming a stacked structure on a transparent substrate, said stacked structure including an anode, a cathode and at least one organic EL layer sandwiched between the anode and the cathode;
- forming a desiccant-containing layer on an inner surface of a sealing can, a desiccant-free layer being disposed on at least part of a surface of said desiccant-containing layer;
- and
- encapsulating the stacked structure using at least the sealing can, so that a gap is defined between said desiccant-containing layer and the stacked structure;
- at least one surface of the cathode being exposed to at least one gas in an interior of the sealing can.
2 more elements
A method for fabricating an organic EL device comprising the steps of:
- forming a stacked structure on a transparent substrate, said stacked structure including an anode, a cathode and at least one organic EL layer sandwiched between the anode and the cathode;
- forming a concave-convex surface on the inner surface of a sealing can;
- forming a desiccant-containing layer on the concave-convex surface of the sealing can, said desiccant-containing layer being formed in such a manner that a surface area of said desiccant-containing layer is not entirely composed of desiccant;
- encapsulating the stacked structure using at least the sealing can;
- at least one surface of the cathode being exposed to at least one gas in an interior of the sealing can.
2 more elements
A method for fabricating an organic EL device comprising the steps of:
- forming a stacked structure on a transparent substrate, said stacked structure including an anode, a cathode and at least one organic EL layer sandwiched between the anode and the cathode;
- forming a desiccant-containing layer on an inner surface of a sealing can;
- and
- encapsulating the stacked structure using at least the sealing can, so that a gap is defined between said desiccant-containing layer and the stacked structure;
- at least one surface of the cathode being exposed to at least one gas in an interior of the sealing can, wherein the gap defines a cavity in the sealing can having a volume of between 1.5 and 10 times larger than a volume defined by the stacked structure.
2 more elements
A method for fabricating an organic EL device comprising the steps of:
- forming a stacked structure on a transparent substrate, said stacked structure including an anode, a cathode and at least one organic EL layer sandwiched between the anode and the cathode;
- forming a desiccant-containing layer on an inner surface of a sealing can;
- and
- encapsulating the stacked structure using at least the sealing can, so that a gap is defined between said desiccant-containing layer and the stacked structure;
- at least one surface of the cathode being exposed to at least one gas in an interior of the sealing can, wherein said desiccant-containing layer is formed to have a surface layer that is substantially desiccant-free.
2 more elements
An organic EL device comprising:
- a transparent substrate;
- a stacked structure formed on the transparent substrate, the stacked structure including 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;
- and
- a desiccant-containing layer adhesively formed on an inner surface of the sealing can, so that a gap is defined between said desiccant-containing layer and the stacked structure, wherein said desiccant-containing layer has a surface layer that is substantially desiccant-free.
2 more elements
Dependencies are inferred from the claim text.