CN1239396A - Organic electroluminescence device - Google Patents
Organic electroluminescence device Download PDFInfo
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- CN1239396A CN1239396A CN99107227A CN99107227A CN1239396A CN 1239396 A CN1239396 A CN 1239396A CN 99107227 A CN99107227 A CN 99107227A CN 99107227 A CN99107227 A CN 99107227A CN 1239396 A CN1239396 A CN 1239396A
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Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/87—Passivation; Containers; Encapsulations
- H10K59/871—Self-supporting sealing arrangements
- H10K59/872—Containers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/87—Passivation; Containers; Encapsulations
- H10K59/874—Passivation; Containers; Encapsulations including getter material or desiccant
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- Electroluminescent Light Sources (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
This organic electroluminescence element has a lamination structure comprising an organic laminated film layer sandwiched between a first electrode and a second electrode, and has an absorption layer with a certain spacing from the lamination structure secured. The absorption layer is formed of one or more material capable of absorbing moisture and oxygen selected from a group consisting of an oxygen absorption agent, an organic or inorganic moisture absorbent, and an antioxidant,in which P2O5 is as moisture absorption agent so promote the luminescence efficiency and life of the element.
Description
The present invention relates to display unit, more particularly, relate to a kind of Organnic electroluminescent device.
Along with the size of display unit becomes bigger, take the still less increase in demand of the flat display apparatus in space, also caused attention as one of them Organnic electroluminescent device.According to use therein material, be divided into inorganic EL device and Organnic electroluminescent device.In the inorganic EL device, luminescence unit is applied in high electric field and electronics quickens in this high electric field, strikes on the luminescence center wherein, and the stimulated luminescence center is luminous.In Organnic electroluminescent device, respectively electronics and hole injection are gone into the luminescence unit from negative electrode and anode, Zhu She electronics and hole are coupled into electron-hole pair (exiton) like this, when electron-hole pair is launched light when excited state is fallen ground state.Because above-mentioned operation principle, require about 100～200 volts high relatively driving voltage so in inorganic EL matching requirements highfield, because the advantage that Organnic electroluminescent device can be worked under 5～20 volts low-voltage, the research of Organnic electroluminescent device is enlivened.Except above-mentioned advantage, for example the visual angle is wide because Organnic electroluminescent device has, response speed is fast, the excellent properties of high-contrast, during so Organnic electroluminescent device can show as graphical display pixel (pixel) or as the TV image or surface source of light in pixel, and because Organnic electroluminescent device is thin and light and color sensation is good, so Organnic electroluminescent device is applicable to follow-on flat display apparatus.
But one of greatest drawback when Organnic electroluminescent device is applied to commercial use is to use the life-span short.The factor in determination device life-span has many, and wherein main some are, exists interface state, low crystallization temperature (Tg) and device between impurity, this organic material and the electrode by oxygen and moisture oxidation in organic material.Impurity in the organic material is caught hole and electronics, perhaps causes electric leakage, and strengthens the crystallization of organic material, thereby shortens the life-span of device.If the interface state between this organic material and this electrode is not suitable for, will causes that electric charge (electronics or hole) injection is obstructed or electric current is excessive, organic material is brought infringement.The unaccommodated situation of interface state between this electrode and this organic material, the interface state between organic material is bad also can to have problems.Promptly, because material (LEL) (HTL) spread and hinders electron motion the luminescent layer, the luminous efficiency deterioration of device from hole-transfer course luminescent layer diffusion to hole transport layer (hole transport layer) from luminescent layer (1ight emitting layer).Luminescent layer and hole transport layer are all formed by organic material, and diffusion is that the diffusion inside at the interface between luminescent layer and the hole transport layer causes.And, low-freeing organic material is as under the situation of this device materials, the transmission of outgoing (exited) molecule is not launched light owing to not radiative degree has been arrived in the crystallization in this device on radiative rank, reduce luminous efficiency and shorten life-span of device.Though can by refine this organic material, exploitation have the material of high crystallization temperature and introduce to improve organic material and electrode between the material of bonding force at interface solve the above problems, the problem that is difficult to solve most is except that deoxidation and moisture.Moisture and oxygen or in manufacture process, Already in enter this device from external penetration in this device or during making this device.In the later case, moisture and oxygen are penetrated in the pin hole in the device, and oxidation organic film and metal, the luminous area of minimizing this means to lose luminous function.In order to solve described problem, proposed with the polymer protective film cover this device with the method that stops moisture or oxygen or with a shield glass and the space filling silicon oil between this shield glass and this device to stop the method for moisture and oxygen.
Fig. 1 shows the sectional drawing of correlation technique device.This correlation technique device stops moisture and oxygen by form protective film 5 on the continuous multilayer structure with glass 1, first electrode 2, organic multilayer (for example hole injection layer (injecting layer), hole transport layer, electronics injecting layer or electron transfer layer) 3 and second electrode 4.This diaphragm 5 is formed by polymer.This polymer is the polymerizable compound of electric insulation, mainly is based on the polymer of vinylogy system, has polyethylene, polypropylene or fluorine.Yet during this polymer of vacuum codeposition, difficulty takes place and can not provide to stop that moisture and oxygen enter the promising result of this device in the device of Fig. 1 on this layer.
Fig. 2 illustrates United States Patent (USP) 5,505,985 devices that proposed.United States Patent (USP) 5; 505; 985 have shown the structure of the device that Organnic electroluminescent device provided, and it has a glass 1, first electrode 2, comprises organic multilayer 3, second electrode 4 and the protective layer 5 of hole injection layer, hole transport layer, electronics injecting layer or electron transfer layer, covers the shield glass 6 on the whole surface of Organnic electroluminescent device, the silicone oil 8 that injects between shield glass and this device by injection openings 7 and the glass cover 9 that stops injection openings 7.
Simultaneously, Fig. 3 has represented in Fig. 3 to have moisture absorption layer 10 below the shield glass 6 and at the overall diagrammatic sketch that has below the moisture absorption layer 10 the polymer support layer 11 with Fig. 2 structural similarity.Moisture absorption layer 10 is formed by hygroscopic agent, for example aluminium oxide, silica gel or zeolite.According to the polymer property of supporting layer 11, device shown in Figure 3 can comprise the active drop of this moisture absorption layer 10, if for example the polymer of supporting layer 11 is nonhygroscopic material, then the material of moisture absorption layer 10 stops moisture absorption on the contrary.And the life-span of device may be shortened in the inside that the silicone oil that is used for Fig. 2 and 3 structures penetrates into device, because the silicone oil of infiltration may become a kind of impurity, and the transmission of block electrons in this device.
In a word, in the Organnic electroluminescent device of correlation technique, be used to stop that the supporting layer of moisture and oxygen can not effectively stop moisture and oxygen, and be used to stop that the silicone oil of moisture and oxygen is penetrated in this device, shorten the life-span of device.
Therefore, the present invention is devoted to get rid of basically the limitation of correlation technique and several problems that defective causes.
One of purpose of the present invention provides and a kind ofly can stop moisture and the oxygen Organnic electroluminescent device with the life-span of extension fixture.
Additional features of the present invention and advantage will be stated in following description, and part will be apparent because of these descriptions, perhaps can learn by practice of the present invention.Structure by particularly pointing out in text description and its claim and the accompanying drawing will realize and reach purpose of the present invention and other advantage.
As summarize and describe widelyr, in order to realize according to these purposes of the present invention and advantage, this Organnic electroluminescent device comprises a laminated construction that contains the lamination organic film between first electrode and second electrode, and separate each other with this laminated construction, by one or more materials and their the mixture absorbed layer that form, that be used for moisture absorption and oxygen uptake that are selected from oxygen absorbent, organic or inorganic hygroscopic agent, the device antioxidant.
" device antioxidant " is meant the reagent that can stop the lamination organic film and second anodizing.This oxidation is an organic and inorganic hygroscopic agent when absorbing moisture, and these absorbents liquefaction cause.Therefore in the present invention, before this organic or inorganic hygroscopic agent moisture absorption or afterwards, this device antioxidant is suitable for contacting by inert gas or the like with this lamination organic film or second electrode, to stop the oxidation of this lamination organic film and this second electrode.
This oxygen absorbent can be 1,2,3-benzenetriol or sodium dithionite (Na
2S
2O
4).And this inorganic hygroscopic agent can be a kind of or more than one are selected from following material: metal oxide, aluminium oxide, silica gel, zeolite and the P of IA family, IIA family and IIIA family
2O
5And this metal oxide is preferably and is selected from BaO, Li
2O, Na
2O, K
2O, BeO, MgO, CaO and B
2O
3In a kind of.Organic hygroscopic agent can be a kind of polymer, and this polymer is selected from polymer, polyureas, polyamide and the polyimides based on acryloyl group, has structural formula-(CHX
1-CHX
2)
n-(X
1And X
2At least one hydrophilic radical) compound, X wherein
1Or X
2Can be to be selected from hydroxyl, hydrogen, alkyl, alkenyl, ester group, ether and the amino any, and this polymer be preferably poly-(vinyl alcohol), poly-(vinylpyrrolidone), poly-(methacrylic acid), poly-(vinyl hydroquinones) and their copolymer.Meanwhile, this device antioxidant can be alkali metal salt, metal or their mixture, wherein this alkali metal salt is preferably and is selected from a kind of in phosphate, sulfate or the carbonate or more than one mixture, and this metal can be preferably and is selected from the metal that alkali metal, alkaline-earth metal and degree of ionization are higher than hydrogen.This alkali metal salt can more preferably be selected from the Na in the phosphate
3PO
4, Na
2HPO
4, NaH
2PO
4, K
3PO
4, K
2HPO
4, CaHPO
4And MgHPO
4In a kind of or more than one mixture, and this metal can more preferably be selected from a kind of dusty material among Na, K, Mg, Ca, Al, Cr, Mn, Fe, Co, Ni, Cu and the Zn.Inert gas can be filled in the space between this laminated construction and this absorbed layer.
This Organnic electroluminescent device may further include and is used to support on the basal surface this absorbed layer, that be formed at this absorbed layer relative with this laminated construction, porous support layer polymer or glass.This polymer can be to be selected from polystyrene, polyimides, polyamide, cellulose, polyethylene, gather (ethylene glycol terephthalate) (PET), gather (methyl methacrylate) (PMMA), polypropylene, polyvinyl chloride, polyvinyl dichloride, poly-trichloroethylene, politef, polyvinyl fluoride, poly-difluoroethylene, poly-trifluoro-ethylene, polytetrafluoroethylene, nylon, polyurethane, poly-(vinyl chloride), polyolefin, Merlon, a kind of in polyformaldehyde and the polysulfones or more than one.The material that is used for the absorbed layer of moisture absorption most preferably is P
2O
5
The invention provides a kind of Organnic electroluminescent device with laminated construction, this laminated construction contains the lamination organic film between first electrode and second electrode, above this laminated construction, form covering the barricade on this whole surface of laminated construction, and by be selected from the absorbed layer that is used for moisture absorption and oxygen uptake that one or more materials in oxygen absorbent, organic or inorganic hygroscopic agent, the device antioxidant and their mixture form on the basal surface of this barricade.This oxygen absorbent can be 1,2,3-benzenetriol or sodium dithionite (Na
2S
2O
4).And this inorganic hygroscopic agent can be a kind of or more than one are selected from following material: the metal oxide, aluminium oxide, silica gel, zeolite and the P that are selected from IA family, IIA family and IIIA family
2O
5And the metal oxide in this inorganic hygroscopic agent is preferably and is selected from BaO, Li
2O, Na
2O, K
2O, BeO, MgO, CaO and B
2O
3In a kind of.This organic hygroscopic agent can be a kind of polymer, and this polymer is selected from polymer, polyureas, polyamide and the polyimides based on acryloyl group, perhaps has structural formula-(CHX
1-CHX
2)
n-(X
1And X
2At least one be hydrophilic radical) compound, X wherein
1Or X
2Can be to be selected from hydrogen, alkyl, alkenyl, ester group, ether and the amino any, and this organic hygroscopic agent be preferably and be selected from a kind of in poly-(vinyl alcohol), poly-(vinylpyrrolidone), poly-(methacrylic acid), poly-(vinyl hydroquinones) and their copolymer.Inert gas can be filled in the space between this laminated construction and this absorbed layer.
This Organnic electroluminescent device may further include and is used to support on the basal surface this absorbed layer, that be formed at this absorbed layer relative with this laminated construction, porous support layer polymer or glass.This polymer can be to be selected from polystyrene, polyimides, polyamide, cellulose, polyethylene, gather (ethylene glycol terephthalate) (PET), gather (methyl methacrylate) (PMMA), polypropylene, polyvinyl chloride, polyvinyl dichloride, poly-trichloroethylene, politef, polyvinyl fluoride, poly-difluoroethylene, poly-trifluoro-ethylene, polytetrafluoroethylene, nylon, polyurethane, poly-(vinyl chloride), polyolefin, Merlon, a kind of in polyformaldehyde and the polysulfones or more than one.P
2O
5For most preferably being used for the material of moisture absorption.Meanwhile, this device antioxidant can be alkali metal salt, metal or their mixture, wherein this alkali metal salt is preferably and is selected from a kind of in phosphate, sulfate or the carbonate or more than one mixture, and this phosphate can more preferably be selected from Na
3PO
4, Na
2HPO
4, NaH
2PO
4, K
3PO
4, K
2HPO
4, CaHPO
4And MgHPO
4In a kind of or more than one mixture.Metal as this device oxidation-resistant material can be to be selected from the metal that alkali metal, alkaline-earth metal and degree of ionization are higher than hydrogen, is preferably a kind of dusty material that is selected from Na, K, Mg, Ca, Al, Cr, Mn, Fe, Co, Ni, Cu and Zn.
The present invention carries first electrode that (a) forms on a kind of substrate, (b) the lamination organic film that on this first electrode, forms, (c) second electrode that on this lamination organic film, forms, (d) above this second electrode, form to cover the barricade on this second electrode and this whole surface of lamination organic film; And the absorbed layer that (e) on this barricade basal surface, forms, this absorbed layer is made up of following material, is selected from 1,2,3-benzenetriol and sodium dithionite (Na
2S
2O
4) first kind of material, be selected from BaO, Li
2O, Na
2O, K
2O, BeO, MgO, CaO and B
2O
3, aluminium oxide, silica gel, zeolite and P
2O
5In a kind of or more than one second kind of material of mixture, be selected from the third material of poly-(vinyl alcohol), polyvinylpyrrolidone, polymethylacrylic acid, poly-(vinyl hydroquinones) and their copolymer, be selected from the 4th kind of material of a kind of in phosphate, sulfate and the carbonate or more than one mixture, be selected from the 5th kind of material that alkali metal, alkaline-earth metal and degree of ionization are higher than the metal of hydrogen, perhaps select the 6th kind of materials two kinds of materials or two or more material mixing from first to the 5th kind of material.In such cases, can in the space between this second electrode and this absorbed layer, fill a kind of inert gas, and this Organnic electroluminescent device may further include and is used to support on the basal surface this absorbed layer, that be formed at this absorbed layer relative with this second electrode, porous support layer polymer or glass.The polymer of this supporting layer can be preferably and be selected from polystyrene, polyimides, polyamide, cellulose, polyethylene, gather (ethylene glycol terephthalate) (PET), gather (methyl methacrylate) (PMMA), polypropylene, polyvinyl chloride, polyvinyl dichloride, poly-trichloroethylene, politef, polyvinyl fluoride, poly-difluoroethylene, poly-trifluoro-ethylene, polytetrafluoroethylene, nylon, polyurethane, poly-(vinyl chloride), polyolefin, Merlon, a kind of in polyformaldehyde and the polysulfones or more than one.As second kind of material P
2O
5Be most preferred, and can add wherein as alkali metal salt, metal or their mixture further with more than one device antioxidant.Meanwhile, preferably the alkali metal salt as this device antioxidant can be a kind of phosphate, and it is for being selected from Na
3PO
4, Na
2HPO
4, NaH
2PO
4, K
3PO
4, K
2HPO
4, CaHPO
4And MgHPO
4In a kind of or more than one mixture, sulfate or carbonate, and the metal as this device oxidation-resistant material can be to be selected from the metal that alkali metal, alkaline-earth metal and degree of ionization are higher than hydrogen, is preferably a kind of dusty material that is selected from Na, K, Mg, Ca, Al, Cr, Mn, Fe, Co, Ni, Cu and Zn.
According to the Organnic electroluminescent device of the preferred embodiment of the invention, have the laminated construction that contains the lamination organic film between first electrode and second electrode, comprise P
2O
5Absorbed layer and more than one device antioxidants.Na
3PO
4Be preferred device antioxidant.
Above-mentioned general description and the following detailed description all should be understood that example and explanation, and attempt to provide further instruction to claim of the present invention.
In order further to understand the present invention, this specification comprises accompanying drawing, and it is merged the part of book as an illustration, accompanying drawing illustrate embodiment of the present invention and and explanatory note partly be used for setting forth principle of the present invention together.
In the accompanying drawing:
Fig. 1～3 have respectively shown a kind of section diagram of background art device; And
Figure 4 and 5 show the section diagram according to the Organnic electroluminescent device of the preferred embodiment of the invention respectively.
Discuss the preferred embodiments of the invention, diagram embodiment in the accompanying drawings now in detail.In order to improve the stable also life-span of extension fixture of device; organic electroluminescence device by using oxygen absorbent of the present invention, organic or inorganic hygroscopic agent, device antioxidant or their mixture are as the material of protective film, and this protective film stops moisture and the oxygen that this device is produced fatal influence.Promptly; not only in order to improve the life-span of device; and for the structure of simplification device, the present invention has avoided pouring in the background technology labyrinth of silicone oil, uses the absorbent with outstanding moisture absorption and ability to take oxygen to replace in the background technology moisture and the low protective material of oxygen blocking capability.
With reference to Fig. 4; Organnic electroluminescent device according to the preferred embodiment of the invention is included in the protective film 29 that forms on the laminated construction surface that has first electrode 23; lamination organic film (having hole injection layer or hole transport layer, organic luminous layer and electron transfer layer or electronics injecting layer) 25; and second electrode 27 that on transparent substrate 21, forms; and the barricade 37 that has the absorbed layer 35 of the top that is formed on laminated construction, with covering protection film 29.This protective film 29 and have in the space between this barricade 37 of absorbed layer 35 and fill a kind of inert gas 31.Avoid infiltration and other external action of moisture and oxygen in these protective film 29 these devices of protection, and requirement can be omitted it according to circumstances.The invention provides a kind of Organnic electroluminescent device that contains laminated construction and absorbed layer, this laminated construction has the lamination organic film between first electrode and second electrode; This absorbed layer forms by being selected from one or more materials in oxygen absorbent, organic or inorganic hygroscopic agent and the device antioxidant and their mixture, separates each other, is used to absorb moisture and oxygen with this laminated construction.In specification of the present invention, " device antioxidant " is meant the reagent that can stop the lamination organic film and second anodizing.When this oxidation was organic or inorganic hygroscopic agent absorption moisture, these absorbents liquefaction caused.Therefore in the present invention, before this organic or inorganic hygroscopic agent moisture absorption or afterwards, this device antioxidant is suitable for contacting by inert gas or the like with this lamination organic film or second electrode, to stop the oxidation of this lamination organic film and second electrode.
This oxygen absorbent can be 1,2,3-benzenetriol or sodium dithionite (Na
2S
2O
4).And this inorganic hygroscopic agent can be a kind of or more than one are selected from following material: the metal oxide, aluminium oxide, silica gel, zeolite and the P that are selected from IA family, IIA family and IIIA family
2O
5And this metal oxide is preferably and is selected from BaO, Li
2O, Na
2O, K
2O, BeO, MgO, CaO and B
2O
3In a kind of.Organic hygroscopic agent can be a kind of polymer, and this polymer is selected from polymer, polyureas, polyamide and the polyimides based on acryloyl group, has structural formula-(CHX
1-CHX
2)
n-(X
1And X
2At least one be hydrophilic radical) compound, X wherein
1Or X
2Can be to be selected from hydroxyl, hydrogen, alkyl, alkenyl, ester group, ether and the amino any, and this polymer be preferably poly-(vinyl alcohol), poly-(vinylpyrrolidone), poly-(methacrylic acid), poly-(vinyl hydroquinones) and their copolymer.Meanwhile, this device antioxidant can be alkali metal salt, metal or their mixture, wherein this alkali metal salt is preferably and is selected from a kind of in phosphate, sulfate or the carbonate or more than one mixture, and this metal can be preferably and is selected from the metal that alkali metal, alkaline-earth metal and degree of ionization are higher than hydrogen.This alkali metal salt can more preferably be selected from the Na in the phosphate
3PO
4, Na
2HPO
4, NaH
2PO
4, K
3PO
4, K
2HPO
4, CaHPO
4And MgHPO
4In a kind of or more than one mixture, and this metal can more preferably be selected from a kind of dusty material among Na, K, Mg, Ca, Al, Cr, Mn, Fe, Co, Ni, Cu and the Zn.Inert gas can be filled in the space between this laminated construction and this absorbed layer.
This Organnic electroluminescent device may further include and is used to support on the basal surface this absorbed layer, that be formed at this absorbed layer relative with this laminated construction, porous support layer polymer or glass.This polymer can be to be selected from polystyrene, polyimides, polyamide, cellulose, polyethylene, gather (ethylene glycol terephthalate) (PET), gather (methyl methacrylate) (PMMA), polypropylene, polyvinyl chloride, polyvinyl dichloride, poly-trichloroethylene, politef, polyvinyl fluoride, poly-difluoroethylene, poly-trifluoro-ethylene, polytetrafluoroethylene, nylon, polyurethane, poly-(vinyl chloride), polyolefin, Merlon, a kind of in polyformaldehyde and the polysulfones or more than one.The material that is used for the absorbed layer of moisture absorption most preferably is P
2O
5
The invention provides a kind of Organnic electroluminescent device with laminated construction, this laminated construction contains the lamination organic film between first electrode and second electrode, this device is included in this laminated construction top and forms covering the barricade on this whole surface of laminated construction, and by be selected from the absorbed layer that is used for moisture absorption and oxygen uptake that one or more materials in oxygen absorbent, organic or inorganic hygroscopic agent, the device antioxidant and their mixture form on the basal surface of this barricade.This oxygen absorbent can be 1,2,3-benzenetriol or sodium dithionite (Na
2S
2O
4).And this inorganic hygroscopic agent can be a kind of or more than one are selected from following material: the metal oxide, aluminium oxide, silica gel, zeolite and the P that are selected from IA family, IIA family and IIIA family
2O
5And the metal oxide in this inorganic hygroscopic agent is preferably and is selected from BaO, Li
2O, Na
2O, K
2O, BeO, MgO, CaO and B
2O
3In a kind of.This organic hygroscopic agent can be a kind of polymer, and this polymer is selected from polymer, polyureas, polyamide and the polyimides based on acryloyl group, perhaps has structural formula-(CHX
1-CHX
2)
n-(X
1And X
2At least one be hydrophilic radical) compound, X wherein
1Or X
2Can be to be selected from hydrogen, alkyl, alkenyl, ester group, ether and the amino any, and this organic hygroscopic agent be preferably and be selected from a kind of in poly-(vinyl alcohol), poly-(vinylpyrrolidone), poly-(methacrylic acid), poly-(vinyl hydroquinones) and their copolymer.Inert gas can be filled in the space between this laminated construction and this absorbed layer.
This Organnic electroluminescent device may further include and is used to support on the basal surface this absorbed layer, that be formed at this absorbed layer relative with this laminated construction, porous support layer polymer or glass.This polymer can be to be selected from polystyrene, polyimides, polyamide, cellulose, polyethylene, gather (ethylene glycol terephthalate) (PET), gather (methyl methacrylate) (PMMA), polypropylene, polyvinyl chloride, polyvinyl dichloride, poly-trichloroethylene, politef, polyvinyl fluoride, poly-difluoroethylene, poly-trifluoro-ethylene, polytetrafluoroethylene, nylon, polyurethane, poly-(vinyl chloride), polyolefin, Merlon, a kind of in polyformaldehyde and the polysulfones or more than one.P
2O
5For most preferably being used for the material of moisture absorption.Meanwhile, this device antioxidant can be alkali metal salt, metal or their mixture, wherein this alkali metal salt is preferably and is selected from a kind of in phosphate, sulfate or the carbonate or more than one mixture, and this phosphate can more preferably be selected from Na
3PO
4, Na
2HPO
4, NaH
2PO
4, K
3PO
4, K
2HPO
4, CaHPO
4And MgHPO
4In a kind of or more than one mixture.Metal as this device oxidation-resistant material can be to be selected from the metal that alkali metal, alkaline-earth metal and degree of ionization are higher than hydrogen, is preferably a kind of dusty material that is selected from Na, K, Mg, Ca, Al, Cr, Mn, Fe, Co, Ni, Cu and Zn.
The invention provides first electrode that (a) forms on a kind of substrate, (b) the lamination organic film that on this first electrode, forms, (c) second electrode that on this lamination organic film, forms, (d) above this second electrode, form to cover the barricade on this lamination organic film and this whole surface of second electrode; And the absorbed layer of (e) forming by following material, be selected from 1,2,3-benzenetriol and sodium dithionite (Na
2S
2O
4) first kind of material, be selected from BaO, Li
2O, Na
2O, K
2O, BeO, MgO, CaO and B
2O
3, aluminium oxide, silica gel, zeolite and P
2O
5In a kind of or more than one second kind of material of mixture, be selected from the third material of poly-(vinyl alcohol), poly-(vinylpyrrolidone), poly-(methacrylic acid), poly-(vinyl hydroquinones) and their copolymer, be selected from the 4th kind of material of a kind of in phosphate, sulfate and the carbonate or more than one mixture, be selected from the 5th kind of material that alkali metal, alkaline-earth metal and degree of ionization are higher than the metal of hydrogen, perhaps select the 6th kind of materials two kinds of materials or two or more material mixing from first to the 5th kind of material.In this example, can in the space between this second electrode and this absorbed layer, fill a kind of inert gas, and this Organnic electroluminescent device may further include and is used to support on the basal surface this absorbed layer, that be formed at this absorbed layer relative with this second electrode, porous support layer polymer or glass.The polymer of this supporting layer can be preferably and be selected from polystyrene, polyimides, polyamide, cellulose, polyethylene, gather (ethylene glycol terephthalate) (PET), gather (methyl methacrylate) (PMMA), polypropylene, polyvinyl chloride, polyvinyl dichloride, poly-trichloroethylene, politef, polyvinyl fluoride, poly-difluoroethylene, poly-trifluoro-ethylene, polytetrafluoroethylene, nylon, polyurethane, poly-(vinyl chloride), polyolefin, Merlon, a kind of in polyformaldehyde and the polysulfones or more than one.As second kind of material P
2O
5Be most preferred, and can add wherein as alkali metal salt, metal or their mixture further with more than one device antioxidant.Meanwhile, preferably the alkali metal salt as this device antioxidant can be a kind of phosphate, and it is for being selected from Na
3PO
4, Na
2HPO
4, NaH
2PO
4, K
3PO
4, K
2HPO
4, CaHPO
4And MgHPO
4In a kind of or more than one mixture, sulfate or carbonate, and the metal as this device oxidation-resistant material can be to be selected from the metal that alkali metal, alkaline-earth metal and degree of ionization are higher than hydrogen, is preferably a kind of dusty material that is selected from Na, K, Mg, Ca, Al, Cr, Mn, Fe, Co, Ni, Cu and Zn.
The Organnic electroluminescent device with laminated construction of band lamination organic film between first electrode and second electrode according to the preferred embodiment of the invention contains P
2O
5Absorbed layer and more than one device antioxidants.P
2O
5Be easy to chemical reaction takes place and produce H
3PO
4-a kind of liquid that drips on the lamination organic film causes the second electrode metal oxidation, thereby shortens the life-span of this device.Therefore, among the present invention at last with a kind of antioxidant, preferably as Na
3PO
4, Na
2HPO
4Or NaH
2PO
4Phosphate, add this absorbed layer to stop P
2O
5Thereby liquefaction stops the oxidation of this device.Can more than one mixture forms absorbed layer 35 in oxygen absorbent, organic or inorganic hygroscopic agent, the device antioxidant by being selected from.That is, requirement according to circumstances can be by comprising whole oxygen absorbents, organic or inorganic hygroscopic agent, device antioxidant, two kinds mixture in them or a kind of formation absorbed layer 35 in them only.By using a kind of non-active solvent to make the material flowability of absorbed layer 35 good and disperse or the like this material to be packed into the lower surface of this barricade 37.According to the performance of this absorbed layer material, the activation condition difference of this absorbed layer material, and under the situation of aluminium oxide or silica gel, they or under about 100～400 ℃ of vacuum or dry under the condition of nitrogen blowing wherein.The dry time is 10～24 hours or longer time.As another embodiment, P
2O
5Can need not activation process as this material.And all material that can be used as this absorbed layer material can not use solvent, and uses with Powdered filling.Meanwhile, can use the high polymer of stainless steel, aluminium or glass or glass transition temperature Tg to form barricade 37, and barricade 37 usefulness epoxies or the UV adhesive 39 that forms like this, for example the compound based on acryl is bonded on the transparent substrate 21.Behind the bonding barricade 37, form two or more opening, remove gas inside under vacuum, fill inert gas and sealed open, perhaps whole device does not form opening and sealed under blanket of nitrogen, thereby has saved the process of filling.Like this, can stop that the formation of the absorbed layer of the moisture that influences this device and oxygen can be finished, and as shown in Figure 5, on the basal surface of this absorbed layer relative, can further be formed for supporting the supporting layer 33 of this absorbed layer with this second electrode.In addition, this device further comprises the protective film 29 that is positioned on second electrode.
As shown in Figure 5, on the basal surface of the absorbed layer 35 under the barricade 37 relative, form supporting layer 33, be used to support this absorbed layer with this second electrode.To be merely able to forming supporting layer 33,, and do not influence absorbed layer 35 moisture absorptions so that supporting layer 33 can stop the material of absorbed layer 35 to fall by porous polymer different moisture or glass with material this absorbed layer.The polymer of supporting layer 33 can be to be selected from polystyrene, polyimides, polyamide, cellulose, polyethylene, gather (ethylene glycol terephthalate) (PET), gather (methyl methacrylate) (PMMA), polypropylene, polyvinyl chloride, polyvinyl dichloride, poly-trichloroethylene, politef, polyvinyl fluoride, poly-difluoroethylene, poly-trifluoro-ethylene, polytetrafluoroethylene, nylon, polyurethane, poly-(vinyl chloride), polyolefin, Merlon, a kind of in polyformaldehyde and the polysulfones or more than one mixture.This supporting layer preferably has the hole dimension of about 0.01～10 μ m.
The present invention can solve in the organic electroluminescent device and use P
2O
5The problem that takes place during as strong hygroscopic agent, in the case, in view of the pure phosphoric acid fusing point is 42.35 ℃, because P
2O
5Absorb many moistures, because H
3PO
4At room temperature exist, work as P with liquid state
2O
5Absorb many moistures and become H
3PO
4Liquid.Usually, because acid is higher than the material of hydrogen by the oxide etch degree of ionization, so liquid phosphoric acid influences this device, as when phosphoric acid passes through supporting layer 33, because of this Organnic electroluminescent device of oxidation especially second electrode, Al, Mg, Ag or the like and shorten life-span of this device.In addition, when this Organnic electroluminescent device is abandoned, P
2O
5Acidity can become problem.In the Organnic electroluminescent device of the present invention, a kind of in oxygen absorbent, hygroscopic agent and polymer are arranged or have comprised a kind of or more than one device oxidation-resistant material in their absorbed layer of mixture material, to stop the oxidized and corrosion of this Organnic electroluminescent device.
In this Organnic electroluminescent device of the present invention, the device oxidation-resistant material has following function.
In el light emitting device of the present invention as the P of hygroscopic agent
2O
5Absorb moisture and become phosphoric acid.In the case, the phosphoric acid oxidation is added on and is selected from the material that alkali metal, alkaline-earth metal or degree of ionization are higher than the metal of hydrogen in the absorbed layer, it is the metal near phosphoric acid, so that just lose the activity of phosphoric acid in phosphoric acid oxidation lamination organic film or this device before the metal.This metal can be preferably a kind of dusty material that is selected from Na, K, Mg, Ca, Al, Cr, Mn, Fe, Co, Ni, Cu and Zn.Simultaneously, be different from aforementioned metal, existence can be as the alkali metal salt of device oxidation-resistant material.When this alkali metal salt in water during ionization, alkali metal salt is alkalescence (the pH value is more than 7).The reaction relevant with hygroscopic agent of this alkali metal salt is as follows.P
2O
5Moisture absorption changes acid phosphoric acid into.In the case, in changing the process of phosphoric acid into, all from the alkali metal ion of alkali metal salt and alkaline-earth metal ions and contiguous phosphoric acid or with becoming the P of phosphoric acid
2O
5Reaction changes phosphate into.This alkali metal salt can be to be selected from a kind of of phosphate, sulfate and carbonate or more than one mixture.This phosphate can be to be selected from Na
3PO
4, Na
2HPO
4, NaH
2PO
4, K
3PO
4, K
2HPO
4, CaHPO
4And MgHPO
4In a kind of or more than one mixture.When the device oxidation-resistant material is included under the situation in this hygroscopic agent, easily the pH value is remained on by the amount of regulating alkali metal salt in 5～8 the scope, can solve the acid problem of this discarded device.Because fusing point uprises when phosphoric acid becomes phosphate, so alkali metal salt is used as the anti-oxidant permission of device hygroscopic agent is controlled in this absorbed layer, thereby can stops supporting layer and barricade to be corroded.In addition, because this alkali metal salt has outstanding wettability power, this alkali metal salt is little to the wettability power influence of hygroscopic agent.As the explanation of front, when with P
2O
5During as the hygroscopic agent in the absorbed layer, metal or alkali metal salt or their mixture can with P
2O
5Use together.In addition, can be further to P
2O
5Additional amount or P
2O
5With add the UV curing agent in the device antioxidant of above-mentioned adding absorbed layer.This UV curing agent can solve for example P
2O
5Hygroscopic agent introduce in the process of this absorbed layer the problem that pulverous particle is blown off.This UV curing agent can be polysiloxanes, acryloyl group (acryl), epoxy or urethanes class.At last, with sealant (sealers) 39 barricade 37 is bonded on the substrate as epoxy adhesive.
The method of making Organnic electroluminescent device according to the preferred embodiment of the invention illustrates with reference to Fig. 4.
Copper phthalocyanine (CuPc) layer that deposit goes out thick 15 nanometers on the transparent substrate 21 with ITO (indium tin oxide) is as the hole injection layer, and the transparency electrode of Tu Bu thick 140 nanometers is as first electrode thereon.Then, deposit TPD[N, N '-diphenyl-N, N '-two (3-aminomethyl phenyl)-(1,1 '-phenylbenzene)-4,4 '-diamines] to about 30 nanometers of thickness as hole transport layer, and vacuum deposition Alq
3(oxine aluminium) to about 50 nanometers of thickness as the green emission layer.Can or can not form electronics injecting layer or electronics injection transfer layer then.Thin alkali metal oxide film of coating and thin metallic film are to form the second electrode lay 27 on the lamination organic film 25 that forms as in the organic electroluminescent device.This second electrode lay can be by Li
2O or Al form, and thickness is about 50 nanometers.On the second electrode lay 29, form protective film 29.Protective film 29 can form by chemical vapor deposition organo-metallic compound or polymer, perhaps can be omitted.Device shown in Figure 4 has protective film.Then, form barricade 37 with the substrate that covers and protection forms by aforementioned technology.Plate glass, plastics or coating metal of barricade 37 is recessed to introduce hygroscopic agent therein and to form absorbed layer 35, wherein, though the scope of the available plastic material of barricade depends on thickness, but generally can preferably use PET, PBT, nylon, Merlon, and, can obtain better effect by coating metal on these polymer.The metallic plate that forms the barricade 37 of absorbed layer 35 therein can be formed by aluminium, iron or copper.
The formation method of the absorbed layer 35 of the hygroscopic agent in barricade 37 will be described in detail as follows.P
2O
5As hygroscopic agent, work as P
2O
5During as hygroscopic agent, will install antioxidant and add wherein.The device antioxidant is with former identical and be preferably Na
3PO
4Perhaps K
3PO
4Form.The barricade 37 that has the absorbed layer 35 of formation like this then is bonded on the base material.The adhesive of epoxies is as the sealant of this barricade of bonding.
Make the method for Organnic electroluminescent device states with reference to Fig. 5 according to another embodiment of the invention.
On substrate 21, form after first electrode 23, form the lamination organic film 25 that comprises luminescent layer thereon and apply the alkali metal coating thereon, to form the second electrode lay 27.On the second electrode lay 27, can form first protective film 29, perhaps can not form it by the coating that chemical vapor deposition applies organo-metallic compound or polymer.Device shown in Figure 5 has this protective film.Form after the barricade 37, form P within it
2O
5 Absorbed layer 35 with the device antioxidant.At the assemble method of compound, material or the parts of this conduct device antioxidant materials of not doing to state, with aforesaid those are consistent.Compare with Organnic electroluminescent device shown in Figure 4, the difference of Organnic electroluminescent device shown in Figure 5 has been to introduce supporting layer 33 with the P in the absorbed layer on the holdout device
2O
5Fall, thereby protect this device.Regulate the hole dimension of supporting layer 33 so that hydrone passes through easily, and hygroscopic agent can not.The size range in the hole in the supporting layer 33 preferably is adjusted to 0.01～10 μ m.Supporting layer 33 is also formed by porous polymer or glass, and the kind of polymer as hereinbefore.Then with supporting layer 33 bonding and be fixed on the barricade 37 with absorbed layer formed thereon 35.Promptly, after on supporting layer 33, applying hot-melt adhesive coating, supporting layer 33 is depressed and fusion under the temperature of adhesive is depressed and do not applied in this supports fusion to this supporting layer of bond vitrified to barricade 37 or with this supporting layer, to bond supporting layer 33 to barricade 37.Perhaps can be at room temperature, or to supporting layer 33 or after barricade 37 applies adhesive supporting layer 33 and barricade 37 are bonded together.And at last barricade 37 is bonded on the substrate 21.
Making in the method for Organnic electroluminescent device according to the preferred embodiments of the invention, the UV curing agent further can be included in the absorbed layer 35 of the Organnic electroluminescent device that Fig. 5 sets forth.This UV curing agent can be polysiloxanes, acryloyl group (acryl), epoxy or urethanes class.
Organnic electroluminescent device of the present invention is only with P
2O
5(A), P
2O
5And the contrast and experiment that basic matterial (B) and aluminium oxide (C) carry out shows below.
| Sample | ????A | ??????B | ???????????C |
| Hygroscopic agent | ????P 2O 5 | ?P 2O 5＋Na 3PO 4 | Aluminium oxide |
| Sealant | Epoxy | Epoxy | Epoxy |
| Temperature | ????80℃ | ????80℃ | ?????????80℃ |
| Humidity | ????50％ | ????50％ | ?????????50％ |
| Duration of test runs | 72 hours | 72 hours | 12 hours |
| Shrinkage | ????0％ | ????0％ | 17.7％(305μm-251μm) |
Can learn from above-mentioned experimental result, to P
2O
5The middle Na that adds
3PO
4Do not cause P
2O
5The difference of wettability power aspect.Therefore use as Na
3PO
4The device antioxidant can be corroded and P by holdout device
2O
5Liquefaction, thus significantly improved the stability of installing.And in absorbed layer, add the powdered ingredients that the UV curing agent can prevent to blow off protective film with aforementioned moisture absorbing.
In a word, according to the P that has of the preferred embodiment of the invention
2O
5Absorbed layer and Organnic electroluminescent devices a kind of or more than one device antioxidants can provide simple manufacturing method and also corrosion device not of oxidation neither, and moisture absorption can with use strong hygroscopic agent P
2O
5Maintenance before is identical.
Under the situation that does not deviate from spirit of the present invention or scope, it will be that those skilled in the art are conspicuous that Organnic electroluminescent device of the present invention is carried out various modifications and variations.Therefore the present invention includes the modifications and variations in those scopes that fall into claim of the present invention and their equivalent.
Claims (40)
1. Organnic electroluminescent device with laminated construction, this laminated construction contains the lamination organic film between first electrode and second electrode, and this device comprises:
Separate each other with this laminated construction, by being selected from oxygen absorbent, organic or inorganic hygroscopic agent and installing the absorbed layer that one or more materials in the antioxidant form.
2. device as claimed in claim 1, wherein oxygen absorbent is 1,2,3-benzenetriol or sodium dithionite (Na
2S
2O
4).
3. device as claimed in claim 1, wherein inorganic hygroscopic agent is a kind of or more than one are selected from following material: the metal oxide, aluminium oxide, silica gel, zeolite and the P that are selected from IA family, IIA family and IIIA family
2O
5
4. device as claimed in claim 3, wherein metal oxide is for being selected from BaO, Li
2O, Na
2O, K
2O, BeO, MgO, CaO and B
2O
3In a kind of.
5. device as claimed in claim 1, wherein organic hygroscopic agent is a kind of polymer, this polymer is selected from polymer, polyureas, polyamide, the polyimides based on acryloyl group or has structural formula-(CHX
1-CHX
2)
n-(X
1And X
2At least one be hydrophilic radical) compound.
6. device as claimed in claim 5, wherein X
1Or X
2Be selected from hydroxyl, hydrogen, alkyl, alkenyl, ester group, ether and the amino any.
7. device as claimed in claim 5, wherein organic hygroscopic agent are selected from a kind of in poly-(vinyl alcohol), poly-(vinylpyrrolidone), poly-(methacrylic acid), poly-(vinyl hydroquinones) and their copolymer.
8. device as claimed in claim 1 is wherein filled a kind of inert gas in the space between this laminated construction and this absorbed layer.
9. device as claimed in claim 1 further comprises being used to support on basal surface absorbed layer, that be formed at this absorbed layer relative with this laminated construction, porous support layer polymer or glass.
10. device as claimed in claim 9, wherein this polymer be selected from polystyrene, polyimides, polyamide, cellulose, polyethylene, poly-(ethylene glycol terephthalate) (PET), poly-(methyl methacrylate) (PMMA), a kind of material or more than one mixtures of material in polypropylene, polyvinyl chloride, polyvinyl dichloride, poly-trichloroethylene, politef, polyvinyl fluoride, poly-difluoroethylene, poly-trifluoro-ethylene, polytetrafluoroethylene, nylon, polyurethane, poly-(vinyl chloride), polyolefin, Merlon, polyformaldehyde and the polysulfones.
11. device as claimed in claim 3, wherein this inorganic hygroscopic agent is P
2O
5
12. device as claimed in claim 1, device antioxidant wherein are the mixture of alkali metal salt, metal or this alkali metal salt and this metal.
13. device as claimed in claim 12, wherein this alkali metal salt is a kind of material or more than one mixtures of material that is selected from phosphate, sulfate and the carbonate.
14. device as claimed in claim 12, wherein this metal is selected from the metal that alkali metal, alkaline-earth metal and degree of ionization are higher than hydrogen.
15. device as claimed in claim 13, wherein phosphate is to be selected from Na
3PO
4, Na
2HPO
4, NaH
2PO
4, K
3PO
4, K
2HPO
4, CaHPO
4And MgHPO
4In a kind of material or more than one mixtures of material.
16. device as claimed in claim 14, wherein this metal is a kind of material powder that is selected among Na, K, Mg, Ca, Al, Cr, Mn, Fe, Co, Ni, Cu and the Zn.
17. the Organnic electroluminescent device with laminated construction, this laminated construction contain the lamination organic film between first electrode and second electrode, this device comprises:
Above this laminated construction, form barricade to cover the whole surface of this laminated construction; And
By being selected from oxygen absorbent, organic or inorganic hygroscopic agent and installing the absorbed layer that one or more materials in the antioxidant form on the basal surface of this barricade.
18. device as claimed in claim 17, wherein this oxygen absorbent is 1,2,3-benzenetriol or sodium dithionite (Na
2S
2O
4).
19. device as claimed in claim 17, wherein inorganic hygroscopic agent be a kind of or more than one be selected from following material: the metal oxide, aluminium oxide, silica gel, zeolite and the P that are selected from IA family, IIA family and IIIA family
2O
5
20. device as claimed in claim 19, wherein metal oxide is for being selected from BaO, Li
2O, Na
2O, K
2O, BeO, MgO, CaO and B
2O
3In a kind of.
21. device as claimed in claim 17, wherein organic hygroscopic agent is a kind of polymer, and polymer, polyureas, polyamide, polyimides or molecular formula that this polymer is selected from based on acryloyl group have structural formula-(CHX
1-CHX
2)
n-(X
1And X
2At least one be hydrophilic radical) compound.
22. device as claimed in claim 21, wherein X
1Or X
2Be selected from hydroxyl, hydrogen, alkyl, alkenyl, ester group, ether and the amino any.
23. device as claimed in claim 21, wherein organic hygroscopic agent are selected from a kind of in poly-(vinyl alcohol), poly-(vinylpyrrolidone), poly-(methacrylic acid), poly-(vinyl hydroquinones) and their copolymer.
24. device as claimed in claim 17 is wherein filled a kind of inert gas in the space between this laminated construction and this absorbed layer.
25. device as claimed in claim 17 further comprises being used to support on basal surface absorbed layer, that be formed at this absorbed layer relative with this laminated construction, porous support layer polymer or glass.
26. device as claimed in claim 25, wherein this polymer be selected from polystyrene, polyimides, polyamide, cellulose, polyethylene, poly-(ethylene glycol terephthalate) (PET), poly-(methyl methacrylate) (PMMA), a kind of material or more than one mixtures of material in polypropylene, polyvinyl chloride, polyvinyl dichloride, poly-trichloroethylene, politef, polyvinyl fluoride, poly-difluoroethylene, poly-trifluoro-ethylene, polytetrafluoroethylene, nylon, polyurethane, poly-(vinyl chloride), polyolefin, Merlon, polyformaldehyde and the polysulfones.
27. device as claimed in claim 19, wherein this inorganic hygroscopic agent is P
2O
5
28. device as claimed in claim 17, device antioxidant wherein are the mixture of alkali metal salt, metal or this alkali metal salt and this metal.
29. device as claimed in claim 28, wherein this alkali metal salt is a kind of material or more than one mixtures of material that is selected from phosphate, sulfate and the carbonate.
30. device as claimed in claim 28, wherein this metal is selected from the metal that alkali metal, alkaline-earth metal and degree of ionization are higher than hydrogen.
31. device as claimed in claim 29, wherein phosphate is to be selected from Na
3PO
4, Na
2HPO
4, NaH
2PO
4, K
3PO
4, K
2HPO
4, CaHPO
4And MgHPO
4In a kind of material or more than one mixtures of material.
32. device as claimed in claim 30, wherein this metal is a kind of material powder that is selected among Na, K, Mg, Ca, Al, Cr, Mn, Fe, Co, Ni, Cu and the Zn.
33. an Organnic electroluminescent device comprises:
(a) first electrode that on a kind of substrate, forms,
(b) the lamination organic film on this first electrode,
(c) second electrode on this lamination organic film,
(d) above this second electrode, form to cover the barricade on this lamination organic film and this whole surface of second electrode; And,
(e) form absorbed layer on the basal surface of this barricade, described absorbed layer is made up of following material,
Be selected from 1,2,3-benzenetriol and sodium dithionite (Na
2S
2O
4) first kind of material,
Be selected from BaO, Li
2O, Na
2O, K
2O, BeO, MgO, CaO and B
2O
3, aluminium oxide, silica gel, zeolite and P
2O
5In a kind of material or second kind of material of more than one mixture,
Be selected from the third material of poly-(vinyl alcohol), poly-(vinylpyrrolidone), poly-(methacrylic acid), poly-(vinyl hydroquinones) and their copolymer,
Be selected from a kind of material in phosphate, sulfate and the carbonate or the 4th kind of material of more than one mixtures of material,
Be selected from the 5th kind of material that alkali metal, alkaline-earth metal and degree of ionization are higher than the metal of hydrogen, perhaps
Select the 6th kind of materials two kinds of materials or two or more material mixing from first to the 5th kind of material.
34. device as claimed in claim 33 is wherein filled a kind of inert gas in the space between this second electrode and this absorbed layer.
35. device as claimed in claim 33 further comprises being used to support on the basal surface this absorbed layer, that be formed at this absorbed layer relative with this second electrode, porous support layer polymer or glass.
36. device as claimed in claim 35, wherein this polymer be selected from polystyrene, polyimides, polyamide, cellulose, polyethylene, poly-(ethylene glycol terephthalate) (PET), poly-(methyl methacrylate) (PMMA), a kind of material or more than one mixtures of material in polypropylene, polyvinyl chloride, polyvinyl dichloride, poly-trichloroethylene, politef, polyvinyl fluoride, poly-difluoroethylene, poly-trifluoro-ethylene, polytetrafluoroethylene, nylon, polyurethane, poly-(vinyl chloride), polyolefin, Merlon, polyformaldehyde and the polysulfones.
37. device as claimed in claim 33, wherein second kind of material is P
2O
5
38. device as claimed in claim 33 further comprises the protective film that is positioned on second electrode.
39. the Organnic electroluminescent device with laminated construction, this laminated construction contain the lamination organic film between first electrode and second electrode, this device comprises:
Separate each other with this laminated construction, by P
2O
5Absorbed layer with one or more device antioxidants formation.
40. device as claimed in claim 39, wherein this device antioxidant is Na
3PO
4
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980012431A KR100287862B1 (en) | 1998-04-08 | 1998-04-08 | Organic Electroluminescence Device |
| KR12431/98 | 1998-04-08 | ||
| KR30316/98 | 1998-07-28 | ||
| KR1019980030316A KR100269391B1 (en) | 1998-07-28 | 1998-07-28 | Organic electroluminescence device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1239396A true CN1239396A (en) | 1999-12-22 |
Family
ID=26633565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99107227A Pending CN1239396A (en) | 1998-04-08 | 1999-04-08 | Organic electroluminescence device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH11329719A (en) |
| CN (1) | CN1239396A (en) |
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