CN100358173C - Organic luminescent displaying element and producing method thereof - Google Patents
Organic luminescent displaying element and producing method thereof Download PDFInfo
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- CN100358173C CN100358173C CNB2004100474659A CN200410047465A CN100358173C CN 100358173 C CN100358173 C CN 100358173C CN B2004100474659 A CNB2004100474659 A CN B2004100474659A CN 200410047465 A CN200410047465 A CN 200410047465A CN 100358173 C CN100358173 C CN 100358173C
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Abstract
The present invention relates to an organic light-emitting display component which comprises a first protective layer formed and covered on a metal electrode, wherein the first protective layer relates to an inert metal layer. A secondary protective layer is formed and covered on the first protective layer. The secondary protective layer relates to a metal oxide.
Description
Technical field
The invention relates to a kind of display unit, and particularly relevant for a kind of organic light emitting display assembly and manufacture method thereof.
Background technology
Organic light-emitting display device (organic light-emitting display in recent years, OLED), in the monitor market, attracted attention gradually with simple framework, splendid working temperature and reaction speed, distinct color contrast and there is not advantage such as visual angle restriction.
The organic luminescent assembly that OLED utilizes organic material to form produces light source, but organic material and metal electrode very easily with the water generates chemical reaction.In case the contact aqueous vapor, the phenomenon that will cause metal anodes oxidize and peel off with the organic material interface makes display produce dim spot (dark spot).Along with the time is long more, the area of dim spot will enlarge and quantity increases.Thus, not only make display brightness reduce, more can cause display quality obviously to descend, even shorten display life.
Have two at this way to solve the problem at present: seal cover is set and adds drier.Yet utilizing seal cover to intercept aqueous vapor need increase many assemblies, and significantly increases device thickness and weight; Add the strong drying agent and strengthen absorbing the reaction speed that moisture also can only temporarily slow down aqueous vapor and metal electrode, in case the moisture degree of drier promptly loses effect near saturated.In addition, these a little methods environment that need design accurate equipment and low humidity carries out step desiccant-filled and encapsulation.Because its complicated production procedure increases considerably equipment needed thereby and step, therefore manufacturing cost also improves.
Therefore, how under the situation of taking into account product advantage and production cost, be current important topic from the stability and the assembly life-span of setting about improving the organic light emitting display assembly at all.
Summary of the invention
In view of this, purpose of the present invention is exactly in that a kind of organic light emitting display assembly and manufacture method thereof are provided, and adopts easy processing procedure, utilize frivolous assembly to improve the ability of metal electrode opposing aqueous vapor and anti-oxidation, reduce dim spot and produce, increase luminescence component stability, improve device lifetime.
According to purpose of the present invention, a kind of organic light emitting display assembly is proposed, be characterized in comprising: a substrate has a transparency electrode and is formed on this substrate; One organic light-emitting structure layer is formed on this transparency electrode; One metal electrode is formed on this organic light-emitting structure layer; And one first protective layer, forming and be covered on this metal electrode, this first protective layer is an inert metal or inert metal alloy.
According to purpose of the present invention, a kind of manufacture method of organic light emitting display assembly is proposed, be characterized in may further comprise the steps: a substrate with a transparency electrode is provided; Form an organic light-emitting structure layer on transparency electrode; Form a metal electrode on the organic light-emitting structure layer; Form one first protective layer usedly to be covered on the metal electrode, first protective layer is an inert metal or inert metal alloy.
For further specifying above-mentioned purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.
Description of drawings
Fig. 1 is the structural representation according to a kind of organic light emitting display assembly of a preferred embodiment of the present invention.
Embodiment
Please refer to Fig. 1, is the structural representation according to a kind of organic light emitting display assembly of a preferred embodiment of the present invention.Organic light emitting display assembly 100 comprises substrate 101, transparency electrode 103, organic light-emitting structure layer 104, metal electrode 105 and protection structure 110.Protection structure 110 comprises first protective layer 111 and second protective layer 112, in order to the protection metal electrode, and isolated aqueous vapor and anti-oxidation.Transparency electrode 103 is formed on the substrate.Organic light-emitting structure layer 104 is formed on the transparency electrode 103.Metal electrode 105 is formed on the organic light-emitting structure layer 104.First protective layer 111 forms and is covered on the metal electrode 105; first protective layer 111 is to be material with the inert metal of densification or inert metal alloy; it for example is the alloy of gold, silver, platinum or silver and gold; contact with aqueous vapor in order to isolated metal electrode 105; and improve the compactness extent of metal electrode 105, reduce the possibility that aqueous vapor and metal electrode 105 produce chemical reaction.Second protective layer 112 is formed on first protective layer 111, and second protective layer 112 is to be material with the metal oxide, for example is aluminium oxide, nickel oxide, indium tin oxide, silica or silicon nitride.Second protective layer 112 is in order to prevent metal electrode 105 oxidations.
As shown in Figure 1, organic light emitting display assembly 100 also comprises TFT assembly 102, is formed between substrate 103 and the transparency electrode 104, and organic light emitting display assembly 100 is active organic light-emitting display modules.All can understand yet have the knack of this skill person, the invention is not restricted to this and also can apply in the passive organic light-emitting display module.
In practical application, the manufacture method of organic light emitting display assembly, its step comprises: form each layer on substrate 101 in regular turn: the substrate 101 with transparency electrode 103 is provided; Form TFT assembly 102 between substrate 101 and transparency electrode 103; Form organic light-emitting structure layer 104 on transparency electrode 103; Form metal electrode 105 on organic light-emitting structure layer 104; Form first protective layer 111 in order to be covered on the metal electrode 105, first protective layer 111 is inert metal or inert metal alloy-layer; Form second protective layer 112 on first protective layer 111, second protective layer 112 is metal oxides.In addition, in practical application, also can form an overcoat (not shown), and the inside of protection organic light emitting display assembly avoids wearing and tearing and the damage of external force in second protective layer top.This overcoat for example is the rigid overlay film based on macromolecular material, or another laminar substrate.
According to the described structure of embodiment; it is with the metal structure of the multilayer electrode as OLED that organic light emitting display assembly of the present invention also can be considered; this electrode mainly comprises three layers, is respectively according to the order that forms: first metal electrode (i.e. metal electrode 105), second metal electrode layer (i.e. first protective layer 111) and the 3rd metal electrode layer (i.e. second protective layer 112).Wherein, first metal electrode layer for example is an aluminium lamination; Second metal electrode layer is to be material with an inert metal or inert metal alloy, for example is gold, silver, platinum or silver and golden alloy; The 3rd metal electrode layer is to be material with a metal oxide, for example is materials such as aluminium oxide, nickel oxide, indium tin oxide, silica or silicon nitride.
Say further; because first protective layer 111 and second protective layer 112 can be protected organic light-emitting structure layer 104 and metal electrode 105; avoid touching aqueous vapor; no matter therefore organic light emitting display assembly 100 is structurally or on processing procedure all can simplify more; reduce that assembly being set, reduce cost.In configuration aspects, need not add extra moistureproof assembly, for example be seal cover or drier.Compared to traditional processing procedure, the metal electrode that is protected is not afraid of aqueous vapor or other active material reacts with it, so metal oxide layer can prolong the Q-time after evaporation finishes the OLED assembly.And, in manufacture process, need not carry out the step that drier is filled and encapsulated with the low wet environment of construction by the construction precision equipment, simplify production required flow process and equipment, saved production cost, increase yield.
The disclosed organic light emitting display assembly of the above embodiment of the present invention utilizes the frivolous assembly and the processing procedure of simplification, fundamentally the working function of reinforced metal electrode (working function), anti-aqueous vapor and oxidation resistant ability.At first, plate the first fine and close protective layer, can help electrical conductivity, reduce the metal electrode resistance value at surface of metal electrode, the working function of reinforcement metal electrode, the problem of pressure drop of minimizing panel promotes the display effect and the uniformity.In addition, comparatively Zhi Mi metal electrode is difficult for producing chemical reaction with aqueous vapor, is difficult for forming dim spot.In addition, the second protective layer metal oxide layer not only can prevent the reaction of aqueous vapor and metal electrode, more can prevent metal anodes oxidize, prolongs service life.On actual processing procedure, only utilize the equipment of frivolous assembly, simplification and flow process, cheap production to generate stability and the service life that originally can effectively improve the organic light emitting display assembly.
Though the present invention describes with reference to current specific embodiment, but those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, under the situation that does not break away from spirit of the present invention, also can make the variation or the replacement of various equivalences, therefore, as long as in connotation scope of the present invention in the scope to the variation of the foregoing description, claims that modification all will drop on the application.
Claims (10)
1. organic light emitting display assembly is characterized in that comprising:
One substrate has a transparency electrode and is formed on this substrate;
One organic light-emitting structure layer is formed on this transparency electrode;
One metal electrode is formed on this organic light-emitting structure layer; And
One first protective layer forms and is covered on this metal electrode, and this first protective layer is an inert metal or inert metal alloy.
2. organic light emitting display assembly as claimed in claim 1 is characterized in that: this inert metal material of this first protective layer is the alloy of gold, silver, platinum or silver and gold.
3. organic light emitting display assembly as claimed in claim 1 is characterized in that: also comprise one second protective layer, be formed on this first protective layer that this second protective layer is a metal oxide.
4. organic light emitting display assembly as claimed in claim 1 is characterized in that: also comprise one second protective layer, be formed on this first protective layer that the material of this second protective layer is a kind of of aluminium oxide, nickel oxide, indium tin oxide, silica or silicon nitride.
5. organic light emitting display assembly as claimed in claim 3 is characterized in that: comprise that also an overcoat is formed at this second protective layer top, and protect this organic light emitting display assembly to avoid wearing and tearing and bump.
6. organic light emitting display assembly as claimed in claim 5 is characterized in that: this overcoat is the rigid overlay film based on macromolecular material.
7. the manufacture method of an organic light emitting display assembly is characterized in that may further comprise the steps:
A., one substrate with a transparency electrode is provided;
B. form an organic light-emitting structure layer on this transparency electrode;
C. form a metal electrode on this organic light-emitting structure layer; And
D. form one first protective layer usedly to be covered on this metal electrode, wherein this first protective layer is an inert metal or inert metal alloy.
8. manufacture method as claimed in claim 7 is characterized in that: this inert metal material of this first protective layer is the alloy of gold, silver, platinum or silver and gold.
9. manufacture method as claimed in claim 7 is characterized in that: also comprise step: form one second protective layer on this first protective layer, this second protective layer is made up of a metal oxide.
10. manufacture method as claimed in claim 7 is characterized in that: form one second protective layer on this first protective layer, the material of this second protective layer is a kind of of aluminium oxide, nickel oxide, indium tin oxide, silica or silicon nitride.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100474659A CN100358173C (en) | 2004-05-31 | 2004-05-31 | Organic luminescent displaying element and producing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100474659A CN100358173C (en) | 2004-05-31 | 2004-05-31 | Organic luminescent displaying element and producing method thereof |
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| CN1585577A CN1585577A (en) | 2005-02-23 |
| CN100358173C true CN100358173C (en) | 2007-12-26 |
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| CNB2004100474659A Active CN100358173C (en) | 2004-05-31 | 2004-05-31 | Organic luminescent displaying element and producing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102881838B (en) * | 2012-09-28 | 2016-08-10 | 京东方科技集团股份有限公司 | The encapsulating structure of luminescent device and method for packing, display device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5059861A (en) * | 1990-07-26 | 1991-10-22 | Eastman Kodak Company | Organic electroluminescent device with stabilizing cathode capping layer |
| JP2002134270A (en) * | 2000-10-27 | 2002-05-10 | Matsushita Electric Works Ltd | Organic electric field light emitting element |
| CN1429052A (en) * | 2001-12-26 | 2003-07-09 | 三星Sdi株式会社 | Organic electroluminescent display device |
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- 2004-05-31 CN CNB2004100474659A patent/CN100358173C/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5059861A (en) * | 1990-07-26 | 1991-10-22 | Eastman Kodak Company | Organic electroluminescent device with stabilizing cathode capping layer |
| JP2002134270A (en) * | 2000-10-27 | 2002-05-10 | Matsushita Electric Works Ltd | Organic electric field light emitting element |
| CN1429052A (en) * | 2001-12-26 | 2003-07-09 | 三星Sdi株式会社 | Organic electroluminescent display device |
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