Light emitting device and method of manufacturing the same
First Claim
1. A light emitting device having a pixel portion on a first insulating film, the pixel portion comprising:
- a first electrode provided between a first wiring and a second wiring;
a first organic compound layer provided on the first electrode;
a second electrode provided on the first organic compound layer;
a third electrode provided between the second wiring and a third wiring;
a second organic compound layer provided on the third electrode; and
a fourth electrode provided on the second organic compound layer, wherein the pixel portion is provided in a closed space produced by a sealing member, the closed space is filled with at least one gas selected from the group consisting of nitrogen, helium, argon, krypton and neon, and a concentration of oxygen and moisture in the closed space is 2 ppm or lower.
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Abstract
Two aspects, an impurity factor and a structural factor are assumed as the deterioration causes of an organic light emitting device and means for solving the respective factors are provided. In order to prevent deterioration of the light emitting device, concentrations of moisture and oxygen, which are left in a space in which an organic light emitting element is sealed, are minimized. At the same time, an impurity including oxygen, such as moisture or oxygen which is included in an organic compound composing the organic light emitting element, is reduced. An element structure for preventing the deterioration of the organic light emitting element due to stress is used to suppress the deterioration.
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Citations
23 Claims
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1. A light emitting device having a pixel portion on a first insulating film, the pixel portion comprising:
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a first electrode provided between a first wiring and a second wiring;
a first organic compound layer provided on the first electrode;
a second electrode provided on the first organic compound layer;
a third electrode provided between the second wiring and a third wiring;
a second organic compound layer provided on the third electrode; and
a fourth electrode provided on the second organic compound layer, wherein the pixel portion is provided in a closed space produced by a sealing member, the closed space is filled with at least one gas selected from the group consisting of nitrogen, helium, argon, krypton and neon, and a concentration of oxygen and moisture in the closed space is 2 ppm or lower. - View Dependent Claims (2)
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3. A method of manufacturing a light emitting device, the method comprising:
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forming an organic compound layer;
performing thermal treatment of the organic compound layer at a reduced pressure after forming the organic compound layer;
forming an electrode on the organic compound layer;
sealing the organic compound layer in a closed space provided with a dry agent; and
performing heating and cooling of the organic compound layer after sealing the organic compound layer in the closed space. - View Dependent Claims (4, 5, 6, 7, 8, 9)
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10. A method of manufacturing a light emitting device, the method comprising:
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forming a first insulating film;
forming a first electrode on the first insulating film;
forming a second electrode in contact with the first electrode and a second insulating film located on the second electrode;
forming an organic compound layer on the first electrode;
forming a third electrode on the organic compound layer;
sealing the organic compound layer in a closed space provided with a dry agent; and
performing heating and cooling of the organic compound after sealing the organic compound layer in the closed space. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method of manufacturing a light emitting device, the method comprising:
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forming a first wiring, a first insulating layer provided on the first wiring, a second wiring, and a second insulating layer provided on the second wiring;
forming an organic compound layer in a self-alignment manner using the first insulating layer and the second insulating layer as masks;
forming a third electrode on the organic compound layer in a self-alignment manner using the first insulating layer and the second insulating layer as masks;
sealing the organic compound layer and the third electrode in a closed space provided with a dry agent; and
performing heating and cooling of the organic compound after sealing the organic compound layer and the third electrode in the closed space. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification