CN109686860A - A kind of multi-functional encapsulation cover plate and preparation method thereof - Google Patents
A kind of multi-functional encapsulation cover plate and preparation method thereof Download PDFInfo
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- CN109686860A CN109686860A CN201811600443.9A CN201811600443A CN109686860A CN 109686860 A CN109686860 A CN 109686860A CN 201811600443 A CN201811600443 A CN 201811600443A CN 109686860 A CN109686860 A CN 109686860A
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- cover plate
- water oxygen
- encapsulation cover
- adsorption layer
- oxygen adsorption
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/841—Self-supporting sealing arrangements
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/846—Passivation; Containers; Encapsulations comprising getter material or desiccants
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/87—Arrangements for heating or cooling
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
Abstract
The invention belongs to encapsulation cover plate technical fields.The present invention provides a kind of multi-functional encapsulation cover plates, including encapsulation cover plate ontology, water oxygen adsorption layer and heat dissipating layer；The water oxygen adsorption layer fits in the bottom on the inside of the encapsulation cover plate ontology, and the heat dissipating layer is bonded with the water oxygen adsorption layer；The water oxygen adsorption layer is made of the material with water oxygen absorption property；The heat dissipating layer is made of the material with heat dissipation performance.In multi-functional encapsulation cover plate of the invention, the water oxygen adsorption layer can prevent water and oxygen to the corrosion failure of luminescent device by the water and Oxygen Adsorption of luminescent device inside and entrance luminescent device in water oxygen adsorption layer；And the thermal coefficient of heat dissipating layer is high, the heat that luminescent device can be generated is to external diffusion, to reduce the temperature of luminescent device, plays the role of protecting luminescent device；The design of water oxygen adsorption layer and heat dissipating layer simplifies the assembling process of luminescent device so that encapsulation cover plate has water oxygen barriers function and heat sinking function simultaneously.
Description
Technical field
The present invention relates to encapsulation cover plate technical fields more particularly to a kind of multi-functional encapsulation cover plate and preparation method thereof.
Background technique
In recent years, organic electroluminescence device has been widely used in actual production life, it is especially aobvious in illumination
Show that field is already yielded unusually brilliant results, be compared to traditional inorganic electroluminescence device, research, preparation and application have become current
Electroluminescent device field one of research field the most active.Organic electronic device is using organic material that can be conductive as base
The semiconductor devices with specific function of plinth preparation.Since the organic material in organic electronic device is largely by carbon and hydrogen
Composition, be used to do electronic device with many benefits, such as it is easy to manufacture, at low cost, chemistry is adjustable, transparent flexible
Deng.Numerous displays and lighting area can be applied to using these advantages of organic electronic device, such as automobile tail light, lamp board
Deng.
But organic electroluminescence device also has disadvantages that and limits its development, one of them extremely important disadvantage
It is exactly that organic material has very poor air stability, especially very sensitive to water oxygen, this also just directly results in organic electroluminescence
Luminescent device needs are effectively encapsulated；In addition to this organic electroluminescence device can also generate huge during luminous
Can be to the heat that device performance itself has a direct impact, how to solve the heat dissipation problem of device is also organic electroluminescent
One of challenge of device.
In the prior art, means of the adsorption gasket further by electroluminescent device sealing are generallyd use and obstruct water
Oxygen, while reaching good heat conduction and heat radiation effect using Graphene electrodes, it is cumbersome.
Summary of the invention
It is provided by the invention multi-functional the purpose of the present invention is to provide a kind of multi-functional encapsulation cover plate and preparation method thereof
Encapsulation cover plate can not only prevent corrosion of the water oxygen to luminescent device, but also heat can be promoted to shed.
In order to achieve the above-mentioned object of the invention, the present invention the following technical schemes are provided:
The present invention provides a kind of multi-functional encapsulation cover plates, including encapsulation cover plate ontology, water oxygen adsorption layer and heat dissipating layer；Institute
It states water oxygen adsorption layer and fits in the bottom on the inside of the encapsulation cover plate ontology, the heat dissipating layer is bonded with the water oxygen adsorption layer；
The water oxygen adsorption layer is made of the material with water oxygen absorption property；The heat dissipating layer is by the material group with heat dissipation performance
At.
Preferably, the material with water oxygen absorption property is calcium, potassium or lithium bromide.
Preferably, the material with heat dissipation performance is boron nitride or graphene.
Preferably, the water oxygen adsorption layer with a thickness of 0.5~1mm.
Preferably, the heat dissipating layer with a thickness of 0.5~1mm.
The present invention also provides a kind of preparation method of multi-functional encapsulation cover plate described in above-mentioned technical proposal, including it is as follows
Step:
It disperses the material with water oxygen absorption property in the first solvent, obtains the first dispersion liquid；
The bottom of inside by first dispersion in encapsulation cover plate ontology, through drying, in encapsulation cover plate ontology
On obtain water oxygen adsorption layer；
It disperses the material with heat dissipation performance in the second solvent, obtains the second dispersion liquid；
In protective atmosphere, by second dispersion on the water oxygen adsorption layer, through drying, obtain multi-functional
Encapsulation cover plate.
Preferably, first solvent is chloroform or chlorobenzene.
Preferably, the concentration of the first dispersion liquid is 5~10mg/mL.
Preferably, second solvent is ethyl alcohol or isopropanol.
Preferably, the concentration of second dispersion liquid is 5~10mg/mL.
The present invention provides a kind of multi-functional encapsulation cover plates, including encapsulation cover plate ontology, water oxygen adsorption layer and heat dissipating layer；Institute
It states water oxygen adsorption layer and fits in the bottom on the inside of the encapsulation cover plate ontology, the heat dissipating layer is bonded with the water oxygen adsorption layer；
The water oxygen adsorption layer is made of the material with water oxygen absorption property；The heat dissipating layer is by the material group with heat dissipation performance
At.In multi-functional encapsulation cover plate of the invention, the water oxygen adsorption layer inside luminescent device and can will enter luminescent device
Water and Oxygen Adsorption in water oxygen adsorption layer, to prevent water and oxygen to the corrosion failure of luminescent device；And heat dissipating layer
Thermal coefficient is high, and the heat that luminescent device can be generated is to external diffusion, to reduce the temperature of luminescent device, plays protection hair
The effect of optical device；The design of water oxygen adsorption layer and heat dissipating layer is so that encapsulation cover plate has water oxygen barriers function and heat dissipation function simultaneously
Can, simplify the assembling process of luminescent device.
Detailed description of the invention
Fig. 1 multi-functional encapsulation cover plate assembling schematic diagram provided by the present invention；
The brightness of 1 gained organic electroluminescence device of Fig. 2 embodiment 1 and comparative example and voltage change with time trend
Figure.
Specific embodiment
The present invention provides a kind of multi-functional encapsulation cover plate, including encapsulation cover plate ontology, water oxygen adsorption layer and heat dissipating layer, institutes
State the bottom (not including side) that water oxygen adsorption layer fits on the inside of the encapsulation cover plate ontology, the heat dissipating layer and the water oxygen
Adsorption layer fitting；The water oxygen adsorption layer is made of the material with water oxygen absorption property；The heat dissipating layer is by with thermal diffusivity
The material composition of energy.
In the present invention, the water oxygen adsorption layer can be inhaled by luminescent device inside and into the water and oxygen of luminescent device
It is attached to water oxygen adsorption layer, to prevent water and oxygen to the corrosion failure of luminescent device；And the thermal coefficient of heat dissipating layer is high, it can
Heat to generate luminescent device, to reduce the temperature of luminescent device, plays the role of protecting luminescent device to external diffusion；
The design of water oxygen adsorption layer and heat dissipating layer simplifies luminous so that encapsulation cover plate has water oxygen barriers function and heat sinking function simultaneously
The assembling process of device.
In the present invention, the material with water oxygen absorption property is preferably calcium, potassium or lithium bromide.
In the present invention, the material with heat dissipation performance is preferably boron nitride or graphene.
In the present invention, the thickness of the water oxygen adsorption layer is preferably 0.5~1mm, more preferably 0.6~0.8mm.
In the present invention, the thickness of the heat dissipating layer is preferably 0.5~1mm, more preferably 0.6~0.8mm.
The present invention also provides a kind of preparation method of multi-functional encapsulation cover plate described in above-mentioned technical proposal, including it is as follows
Step:
It disperses the material with water oxygen absorption property in the first solvent, obtains the first dispersion liquid；
The bottom of inside by first dispersion in encapsulation cover plate ontology, through drying, in encapsulation cover plate ontology
On obtain water oxygen adsorption layer；
It disperses the material with heat dissipation performance in the second solvent, obtains the second dispersion liquid；
In protective atmosphere, by second dispersion on the water oxygen adsorption layer, through drying, obtain multi-functional
Encapsulation cover plate.
The present invention disperses the material with water oxygen absorption property in the first solvent, obtains the first dispersion liquid.
In the present invention, first solvent is preferably chloroform or chlorobenzene.
In the present invention, the concentration of first dispersion liquid is preferably 5~10mg/mL, more preferably 6~8mg/mL.
After obtaining first dispersion liquid, the present invention is by first dispersion in the inside of encapsulation cover plate ontology
Bottom obtains water oxygen adsorption layer through drying on encapsulation cover plate ontology.
Encapsulation cover plate is preferably successively carried out cleaning treatment and drying by the present invention, is then coated with first dispersion liquid.
In the present invention, the cleaning treatment preferably includes following steps:
Encapsulation cover plate is successively cleaned by ultrasonic in cleaning solution, water, acetone and isopropanol.
In the present invention, the cleaning solution is preferably the aqueous solution of dish washing liquid and cleanser.The present invention is to the dish washing liquid
It is not particularly limited with the dosage of cleanser, those skilled in the art can select dish washing liquid according to the clean-up performance of encapsulation cover plate
With the dosage of cleanser.The present invention is not particularly limited the specific type of the dish washing liquid and cleanser, is washed using commercially available
Clean essence and cleanser.
The present invention is not particularly limited the time of the ultrasonic cleaning.In embodiments of the present invention, the cleaning solution,
The time being cleaned by ultrasonic in water, acetone and isopropanol is independently preferably 80~100min, more preferably 85~95min.
The present invention is not particularly limited the number of the cleaning treatment, in embodiments of the present invention, the cleaning treatment
Number be preferably 2~4 times.
The present invention is not particularly limited the mode of the drying, can obtain dry encapsulation cover plate.
The present invention is not particularly limited the coating method of first dispersion liquid, and those skilled in the art can be according to need
Coating method is selected, in embodiments of the present invention, the mode of the coating is preferably drop-coating, vapour deposition method, spin-coating method or spray
Coating.
In the present invention, the drying process after the completion of first dispersion is preferably done in protective atmosphere
It is dry；The temperature of the drying is preferably 330~370 DEG C；The time of the drying is preferably 15~30min.The present invention is to described
The specific type of protective atmosphere is not particularly limited, and can be common protective atmosphere, such as nitrogen atmosphere or atmosphere of inert gases.
The present invention disperses the material with heat dissipation performance in the second solvent, obtains the second dispersion liquid.The present invention is to institute
The preparation time for stating the second dispersion liquid is not particularly limited, and can prepare simultaneously with the first dispersion liquid, or prepared first point
The second dispersion liquid is prepared after dispersion liquid, or after obtaining water oxygen adsorption layer on encapsulation cover plate ontology, then prepare the second dispersion liquid.
In the present invention, second solvent is preferably ethyl alcohol or isopropanol.
In the present invention, the concentration of second dispersion liquid is preferably 5~10mg/mL, more preferably 6~8mg/mL.
After obtaining water oxygen adsorption layer and the second dispersion liquid, the present invention is in protective atmosphere, by second dispersion
In on the water oxygen adsorption layer, through drying, multi-functional encapsulation cover plate is obtained.
The present invention is not particularly limited the coating method of second dispersion liquid, and those skilled in the art can be according to need
Coating method is selected, in embodiments of the present invention, the mode of the coating is preferably drop-coating, vapour deposition method, spin-coating method or spray
Coating.
In the present invention, the drying process after the completion of second dispersion is preferably done in protective atmosphere
It is dry；The temperature of the drying is preferably 180~220 DEG C；The time of the drying is preferably 40~60min.The present invention is to described
The specific type of protective atmosphere is not particularly limited, and can be common protective atmosphere, such as nitrogen atmosphere or atmosphere of inert gases.
The assembling process of multi-functional encapsulation cover plate provided by the present invention carries out preferably in protective atmosphere, to avoid water oxygen
Adsorption layer adsorbs water and oxygen.The present invention is not particularly limited the specific type of the protective atmosphere, can protect to be common
Atmosphere is protected, such as nitrogen atmosphere or atmosphere of inert gases.
The present invention is not particularly limited the assemble method of the multi-functional encapsulation cover plate, using conventional encapsulation cover plate
Assemble method.Fig. 1 is multi-functional encapsulation cover plate assembling schematic diagram provided by the present invention, as shown in Figure 1, multi-functional encapsulation
Cover board includes encapsulation cover plate ontology, water oxygen adsorption layer and heat dissipating layer, and the water oxygen adsorption layer fits in the encapsulation cover plate ontology
The bottom (not including side) of inside, the heat dissipating layer is bonded with the water oxygen adsorption layer, when assembling luminescent device, in more function
Energy encapsulation cover plate edge applies packaging plastic, then bonds multi-functional encapsulation cover plate and luminescent device.
A kind of multi-functional encapsulation cover plate provided by the invention and preparation method thereof is carried out below with reference to embodiment detailed
Illustrate, but they cannot be interpreted as limiting the scope of the present invention.
Embodiment 1
(1) glass-encapsulated cover board is successively cleaned by ultrasonic in cleaning solution, water, acetone and isopropanol, in each solvent
The time of middle ultrasonic cleaning is 90min；The cleaning solution is the aqueous solution of dish washing liquid and cleanser；
Then it repeats the above steps, cleans obtain clean glass-encapsulated cover board twice again；
(2) it disperses calcium in chloroform, obtains the calcium dispersion liquid that concentration is 5mg/mL；By the calcium dispersion liquid drop coating
Then drop coating is had the glass-encapsulated cover board of calcium dispersion liquid in nitrogen atmosphere by the bottom on the inside of the glass-encapsulated cover board, in
350 DEG C of dry 20min, obtain water oxygen adsorption layer on glass-encapsulated cover board；
(3) it disperses boron nitride in ethanol solution, obtains the boron nitride dispersion that concentration is 7mg/mL；By the nitridation
Boron dispersant liquid drop is coated on the water oxygen adsorption layer, then drop coating is had to the glass-encapsulated lid of boron nitride dispersion in nitrogen atmosphere
Plate；Multi-functional encapsulation cover plate is obtained in 200 DEG C of dry 40min in nitrogen atmosphere；
(4) the multi-functional encapsulation cover plate is attached into organic electroluminescence device by packaging plastic in nitrogen environment
On, complete encapsulation.
Comparative example 1
Will glass-encapsulated cover board identical with glass-encapsulated cover board used in embodiment 1 according to 1 step of embodiment (4) institute
The method stated is packaged with organic electroluminescence device.
Embodiment 1 and the obtained organic electroluminescence device of comparative example 1 are placed in identical condition, test the electricity of the two
Pressure and brightness change with time, as a result as shown in Figure 2.As shown in Figure 2, after using 150h, method provided by the present invention
The brightness of obtained organic electroluminescence device is higher, voltage is lower, illustrates multi-functional encapsulation cover plate energy provided by the present invention
Water and oxygen are enough adsorbed, and is radiated, the service life for improving organic electroluminescence device is conducive to.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of multi-functional encapsulation cover plate, including encapsulation cover plate ontology, water oxygen adsorption layer and heat dissipating layer；The water oxygen adsorption layer patch
Together in the bottom on the inside of the encapsulation cover plate ontology, the heat dissipating layer is bonded with the water oxygen adsorption layer；The water oxygen adsorption layer
It is made of the material with water oxygen absorption property；The heat dissipating layer is made of the material with heat dissipation performance.
2. multi-functional encapsulation cover plate according to claim 1, which is characterized in that the material with water oxygen absorption property
For calcium, potassium or lithium bromide.
3. multi-functional encapsulation cover plate according to claim 1, which is characterized in that the material with heat dissipation performance is nitrogen
Change boron or graphene.
4. multi-functional encapsulation cover plate according to claim 1 or 2, which is characterized in that the water oxygen adsorption layer with a thickness of
0.5~1mm.
5. multi-functional encapsulation cover plate according to claim 1 or 3, which is characterized in that the heat dissipating layer with a thickness of 0.5~
1mm。
6. a kind of preparation method of the described in any item multi-functional encapsulation cover plates of Claims 1 to 5, includes the following steps:
It disperses the material with water oxygen absorption property in the first solvent, obtains the first dispersion liquid；
The bottom of inside by first dispersion in encapsulation cover plate ontology, through drying, on encapsulation cover plate ontology
To water oxygen adsorption layer；
It disperses the material with heat dissipation performance in the second solvent, obtains the second dispersion liquid；
In protective atmosphere, by second dispersion on the water oxygen adsorption layer, through drying, multi-functional encapsulation is obtained
Cover board.
7. preparation method according to claim 6, which is characterized in that first solvent is chloroform or chlorobenzene.
8. preparation method according to claim 6 or 7, which is characterized in that the concentration of the first dispersion liquid is 5~10mg/mL.
9. preparation method according to claim 6, which is characterized in that second solvent is ethyl alcohol or isopropanol.
10. preparation method according to claim 6 or 9, which is characterized in that the concentration of second dispersion liquid be 5~
10mg/mL。
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