Organic EL element and method of manufacturing the same
AssigneeSeiko Epson Corporation
InventorKatsuyuki Morii
Life of this patent
Estimating the term…
Abstract
To seal an organic EL element satisfactorily, even when light is radiated from both electrode sides in the organic EL element. Laminate 20 is formed on transparent substrate 1. Laminate 20 includes transparent electrode 2, hole injecting and transporting layer 3, light emitting layer 4, and cathode 5. The top face of cathode 5 of laminate 20 and the end face of laminate 20 are covered by fist sealing layer 6 comprising LiF. The outer side of first sealing layer 6 is covered by second sealing layer 7 comprising an epoxy resin.
Claims11
An organic EL element, comprising:
- a substrate;
- a laminate formed on said substrate, said laminate having a structure including a cathode, an anode, and a light emitting layer including an organic material and being sandwiched between said cathode and anode;
- and
- a sealant, at least a face of the laminate opposite to the substrate being sealed by the sealant, the sealant having a plural-layer structure including an inner first sealing layer and an outer second sealing layer, said first sealing layer including a halide of at least one of an alkali metal or an alkaline earth metal, and said second sealing layer including a resinous material that is moisture resistant,
- wherein said first sealing layer has a thickness of not less than 300 angstroms and not more than 600 angstroms.
A method of manufacturing an organic EL element, comprising the steps of:
- forming a laminate on a substrate, said laminate having a structure including a cathode, an anode, and a light emitting layer, said light emitting layer including an organic material and being sandwiched between said cathode and anode;
- forming a first sealing layer at least on a face of the laminate opposite to the substrate in an atmosphere being substantially free from oxygen and water, said first sealing layer including a halide of an alkali metal or an alkaline earth metal in a thickness of not less than 300 angstroms and not more than 600 angstroms;
- and
- forming a second sealing layer on an outer side of the first sealing layer in an atmosphere being substantially free from oxygen and water, said second sealing layer including a resinous material that is moisture resistant.
Dependencies are inferred from the claim text.