CN109935734A - Luminescent device and preparation method thereof - Google Patents
Luminescent device and preparation method thereof Download PDFInfo
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- CN109935734A CN109935734A CN201711351218.1A CN201711351218A CN109935734A CN 109935734 A CN109935734 A CN 109935734A CN 201711351218 A CN201711351218 A CN 201711351218A CN 109935734 A CN109935734 A CN 109935734A
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Abstract
The present invention relates to a kind of luminescent devices and preparation method thereof.The preparation method of the luminescent device includes the following steps: that offer flexible substrate, the flexible substrate are provided with QLED device；The first composite membrane is formed in the QLED device surface using Barix encapsulation technology, first composite membrane is made of the first resin film being stacked and the first inorganic thin film, first resin film is formed in the QLED device surface, contains activating agent in first resin film.Preparation method of the invention is suitable for the addition of activating agent under the thin-film package mode of flexible substrate, can achieve the beneficial effect for promoting device efficiency.
Description
Technical field
The invention belongs to technology of quantum dots, and in particular to a kind of luminescent device and preparation method thereof.
Background technique
Electroluminescent technology i.e. light emitting diode with quantum dots (QLED) technology based on quantum dot, since it is as new
The great potential of generation display technology receives more and more attention in recent years.The advantage of QLED display technology derives from quantum dot
This special nano material has such as unique nanometer property, such as launch wavelength is continuously adjustable, emission wavelength is narrow, luminous
Intensity height, fluorescence lifetime length, stability height etc..In recent years, the performance of QLED device such as efficiency and service life also obtains steady
It improves.
The performance of QLED device can be improved by diversified approach.It is disclosed in prior art scheme, Ke Yitong
It crosses and adds the unsaturation such as active constituent such as acrylic acid, benzoic acid, butenoic acid in potting resin or in QLED device architecture
The saturated carboxylic acids such as carboxylic acid or acetic acid, propionic acid, butyric acid (are usually made by the interaction of these active constituents and QLED device
It is 4 days or more with the time) come effective efficiency for promoting device.However active constituent need to be added and sealed in this technical solution
It fills in resin, is then realized and encapsulated by glass cover-plate, glass cover-plate adopted here adds the packaged type of potting resin only
It can be suitble to the QLED device using glass as substrate, and be to realize activity through the above technical solution for flexible substrate
The addition of ingredient, and at the same time reaching the useful effect of effective encapsulation and active constituent for QLED device.Based on upper
Analysis is stated, prior art has much room for improvement.
Summary of the invention
It is an object of the invention to overcome the above-mentioned deficiency of the prior art, a kind of luminescent device and preparation method thereof is provided,
Aim to solve the problem that existing glass cover-plate adds the packaged type of potting resin that can only be suitble to the luminescent device using glass as substrate, and it is right
It cannot achieve the technical issues of activating agent addition reaches useful effect in flexible substrate.
For achieving the above object, The technical solution adopted by the invention is as follows:
One aspect of the present invention provides a kind of preparation method of luminescent device, includes the following steps:
Flexible substrate is provided, is prepared with QLED device in the flexible substrate；
The first composite membrane is formed in the QLED device surface using Barix encapsulation technology, first composite membrane is by layer
The first resin film and the first inorganic thin film composition, first resin film of folded setting are formed in the QLED device table
Activating agent is contained in first resin film in face.
Another aspect of the present invention provides a kind of luminescent device, including flexible substrate and is arranged in the flexible substrate
QLED device is provided with the first composite membrane on the QLED device；First composite membrane is thin by the first resin being stacked
Film and the first inorganic thin film composition, first resin film are arranged in the QLED device surface, first resin film
In contain activating agent.
The preparation method of luminescent device provided by the invention, especially suitable for being encapsulated with the QLED device of flexible substrate,
Effective encapsulation has been carried out to the QLED device of flexible substrate, the addition of the activating agent of active constituent is realized in the preparation method,
It makes up to and promotes QLED device efficiency；Therefore, preparation method of the invention is suitable under the thin-film package mode of flexible substrate
The addition of activating agent can achieve the beneficial effect for promoting device efficiency.
Luminescent device provided by the invention has carried out effective encapsulation to the QLED device of flexible substrate, realize activity at
The addition of the activating agent divided makes up to the beneficial effect for promoting QLED device efficiency.
Detailed description of the invention
Fig. 1 is the preparation method schematic diagram of luminescent device in the present invention.
Specific embodiment
In order to which technical problems, technical solutions and advantageous effects to be solved by the present invention are more clearly understood, below in conjunction with
Embodiment, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used to explain
The present invention is not intended to limit the present invention.
It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element
On one element or indirectly on another element.When an element is known as " being connected to " another element, it can
To be directly to another element or be indirectly connected on another element.
It is to be appreciated that term " length ", " width ", "upper", "lower", "front", "rear", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" "inner", "outside" is that orientation based on the figure or position are closed
System, is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must have
Specific orientation is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " the
One ", " second " etc. is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicates indicated
Technical characteristic quantity.Define " first " as a result, the feature of " second " can explicitly or implicitly include one or
More this feature.
On the one hand, the embodiment of the invention provides a kind of preparation method of luminescent device, include the following steps:
S01: flexible substrate is provided, is prepared with QLED device in the flexible substrate；
S02: the first composite membrane, first composite membrane are formed in the QLED device surface using Barix encapsulation technology
It is made of the first resin film and the first inorganic thin film that are stacked, first resin film is formed in the QLED device
Activating agent is contained in first resin film in surface.
The preparation method of luminescent device provided in an embodiment of the present invention, especially suitable for the QLED device envelope with flexible substrate
Dress, has carried out effective encapsulation to the QLED device of flexible substrate, the activating agent of active constituent is realized in the preparation method
Addition makes up to and promotes QLED device efficiency；Therefore, the preparation method of the embodiment of the present invention is suitable for the film of flexible substrate
The addition of activating agent under packaged type can achieve the beneficial effect for promoting device efficiency.
In prior art, although in device can be prepared early period by adding certain active constituents in potting resin
Promoted QLED device efficiency, but glass cover-plate adopted here add the packaged type of potting resin can only be suitble to using glass as
The QLED device of substrate, and be that can not realize the addition of active constituent simultaneously by above-mentioned prior art scheme for flexible substrate
And reach the useful effect of effective encapsulation and active constituent for QLED device simultaneously.Therefore, for flexible substrate
QLED device needs to be firstly introduced into the effective packaging method of suitable flexible substrate, and activity is then realized in this packaging method
The addition of ingredient simultaneously makes up to the effect for promoting QLED device efficiency.And the preparation method of the luminescent device of the embodiment of the present invention
The purpose may be implemented.
Barix encapsulation technology is a kind of plural layers encapsulation technology for being suitable for flexible substrate device, therefore be can choose
As the packaged type for being used for flexibility QLED device in the embodiment of the present invention；Utilize Organic-inorganic composite in Barix encapsulation technology
The alternate multiple membrane structure of film will have first resin of the active constituent for promoting effect in multi-layer film structure for device efficiency
It is introduced in film, so that active constituent can either be introduced effective and reasonablely, and can guarantee effective encapsulation of flexible QLED device；Have
Machine-inorganic substances compound membrane not only can be adapted for flexible substrate device and improve the surface smoothness of flexible substrate device, simultaneously also
Its water and oxygen barrier property can be greatly increased, stops the performance of water oxygen can be thin by changing film covering organic matter and inorganic matter
The number of plies and ingredient of film are regulated and controled.The main function that organic film plays is to improve flatness, reduce mechanical damage, is improved brilliant
The thermal stability and improvement chemical polarization on grain surface.The main function of inorganic matter film is barrier layer, it is desirable that as far as possible zero defect with
Guarantee leakproofness.But inevitably can be defective in inorganic thin film in practical preparation process, at this moment if the thickness of organic layer is less than nothing
When the defect average length on machine barrier layer, extraneous water oxygen is still able to penetrate into inside；Therefore pass through this organic and inorganic
Alternating deposit, organic layer can fill up the defect of inorganic layer effectively to enhance the effect of inorganic barrier layer.
Further, it in the preparation method of above-mentioned luminescent device, further comprises the steps of: using Barix encapsulation technology, in institute
It states the first composite membrane superimposed layer and forms the second composite membrane of layer 1-7, the second resin that each second composite membrane is arranged by lamination is thin
Film and the second inorganic thin film composition；Wherein,
It is inorganic that first be arranged in first composite membrane is laminated in the second resin film in the second composite membrane of first layer
The second nothing being arranged in preceding second composite membrane is laminated in film surface, the second resin film in posterior second composite membrane
Machine film surface is free of activating agent in each second resin film.
I.e. preferably, after depositing one layer of first resin film containing activating agent, redeposited layer 1-7 does not contain activating agent
The second resin film, such packaging effect is more preferably.It is highly preferred that the number of plies of the second composite membrane is 1-5 layers.
The preparation method principle of the luminescent device of the embodiment of the present invention is as shown in Figure 1:
A) QLED device (QLED stack) is prepared on flexible substrates；
B) active constituent is added in curable potting resin；
C) one layer of above-mentioned resin film containing active constituent is deposited (i.e. by Barix encapsulation technology on QLED device
First resin film)；
D) continue to deposit one layer of inorganic thin film (i.e. the first inorganic thin film) by Barix encapsulation technology；
E) resin film of one layer of the deposition without active constituent is continued by Barix encapsulation technology (i.e. the second resin is thin
Film)；
F) continue to deposit one layer of inorganic thin film (second i.e. inorganic thin film) by Barix encapsulation technology；
G) continue to repeat e, f step repeatedly (the second resin film and the second inorganic thin film one composite layer of composition, i.e., repeatedly N
N layers of composite layer are obtained after secondary).
QLED device, that is, QLED stack in foregoing description, luminescent device be include substrate, QLED device, potting resin,
Integral member including active constituent.
Further, in the preparation method of above-mentioned luminescent device, the flexible substrate is selected from polyimides (PI), poly- couple
Diethyl phthalate (PET), polycarbonate (PC), polyethylene naphthalate (PEN), polynorbornene (PNB), polyethers
At least one of sulfone (PES) and cyclic olefin polymer (COP), but not limited to this.Resin choosing in every layer of resin film
From at least one of epoxy resin, phenolic resin and Lauxite, but not limited to this.Inorganic material in every layer of inorganic thin film
Material is selected from least one of aluminium oxide, silica and silicon nitride, but not limited to this；The depositional mode of above-mentioned inorganic thin film can be with
It is atomic layer deposition (Atomic Layer Deposition, ALD), plasma activated chemical vapour deposition (Plasma
Enhanced Chemical Vapor Deposition, PECVD), at least one in d.c. sputtering (DC sputtering)
Kind.The activating agent is selected from saturated carboxylic acid and/or unsaturation carboxylic acid, it is further preferred that the saturated carboxylic acid is selected from acetic acid, third
At least one of acid, butyric acid and isobutyric acid, but not limited to this；The unsaturation carboxylic acid be selected from acrylic acid, benzoic acid, butenoic acid and
At least one of methacrylic acid, but not limited to this.
Further, in the preparation method of above-mentioned luminescent device, in first resin film, the matter of the activating agent
Amount score is 5-40%.That is addition weight percentage ranges of the activating agent in the first resin film are between 5-40%.More into
One step, first resin film and each second resin film with a thickness of 0.25-800 microns；Described first is inorganic
Film and each second inorganic thin film with a thickness of 20-120 nanometers.
It further, further include heating after depositing second composite membrane in the preparation method of above-mentioned luminescent device
The step of processing.Specifically, the temperature of the heat treatment is 50-90 DEG C；The time of the heat treatment is 1-48h.
On the other hand, the embodiment of the invention also provides a kind of luminescent devices, including flexible substrate and setting are described soft
QLED device on property substrate is provided with the first composite membrane on the QLED device；First composite membrane is by being stacked
First resin film and the first inorganic thin film composition, first resin film setting is in the QLED device surface, and described the
Contain activating agent in one resin film.
Luminescent device provided in an embodiment of the present invention has carried out effective encapsulation to the QLED device of flexible substrate, has realized
The addition of the activating agent of active constituent makes up to the beneficial effect for promoting QLED device efficiency.
It is further preferred that going back lamination on first composite membrane is provided with the second composite membrane of layer 1-7, each described second is multiple
The second resin film and the second inorganic thin film that conjunction film is arranged by lamination form；Wherein, second in the second composite membrane of first layer
Resin film is laminated the first inorganic thin film surface for being arranged in first composite membrane, and second in posterior second composite membrane
Resin film is laminated the second inorganic thin film surface for being arranged in preceding second composite membrane, in each second resin film not
Containing activating agent.
The present invention successively carried out test of many times, and it is further detailed as reference pair invention progress now to lift A partial experiment result
Thin description, is described in detail combined with specific embodiments below.
Embodiment 1
A kind of packaging method of QLED device, in turn includes the following steps:
(1) acrylic acid that weight percent is 20% in addition in potting resin；
(2) tree of the above-mentioned active constituent containing acrylic acid is deposited on the existing green QLED device being prepared in flexible substrate
5 microns of membrane of lipoprotein；
(3) 100 nanometers of inorganic thin film for continuing deposition of aluminium oxide by d.c. sputtering；
(4) continue 0.5 micron of resin film that deposition is free of acrylic acid active constituent；
(5) 30 nanometers of inorganic thin film for continuing deposition of aluminium oxide by d.c. sputtering；
(6) (4), (5) step 5 time are repeated, the green QLED that thin-film package finishes is obtained；
(7) room temperature, 50 DEG C, 90 DEG C of heat treatment are carried out respectively to above-mentioned green QLED in nitrogen atmosphere；
(8) observation green QLED is with the device external quantum efficiency variation (%) for handling the time, as a result as shown in table 1 below:
Table 1
As can be seen from Table 1, compared to the QLED device of room temperature, heat treatment can effectively promote device efficiency increasing
Long rate；And heating temperature is higher, heating time is longer, and acceleration effect is more obvious；It was found from the present embodiment: heating for
The beneficial effect that active constituent promotes QLED device efficiency has acceleration.
Embodiment 2
A kind of packaging method of QLED device, in turn includes the following steps:
(1) acrylic acid that weight percent is 5%, 10%, 20%, 30%, 40% in adding respectively in potting resin；
(2) above-mentioned active constituent containing acrylic acid is deposited respectively on the existing green QLED device being prepared in flexible substrate
600 microns of resin film；
(3) 120 nanometers of inorganic thin film for continuing deposited silicon nitride by PECVD；
(4) continue 5 microns of resin film that deposition is free of acrylic acid active constituent；
(5) 50 nanometers of inorganic thin film for continuing deposited silicon nitride by PECVD；
(6) (4), (5) step 2 time are repeated, the green QLED that thin-film package finishes is obtained；
(7) 50 DEG C are carried out to above-mentioned green QLED in nitrogen atmosphere to heat 1 day；
(8) green QLED is observed as the device external quantum efficiency of time changes (%), as a result as shown in table 2 below:
Table 2
As can be seen from Table 2, the addition concentration of acrylic acid is within the scope of 5-40% and cooperation heat treatment can generate
The beneficial effect that different degrees of device efficiency is promoted.
Comparative test
Glass substrate adds glass cover-plate packaged type and flexible substrate to add the Contrast on effect of thin-film package mode
(1) flexible substrate adds thin-film package mode referring to carrying out in embodiment 1；
(2) glass substrate adds the packaged type of glass cover-plate to operate as follows: the weight percent in addition in potting resin
For 20% acrylic acid；Existing green QLED device is packaged using above-mentioned potting resin and glass cover-plate and UV solidifies；
(3) 50 DEG C are carried out to the green QLED using above two packaged type in nitrogen atmosphere to heat 1 day；
(4) observation green QLED is with the device external quantum efficiency variation (%) for handling the time, as a result as shown in table 3 below:
Table 3
| Packaged type | After 1 day | After 2 days | After 3 days | After 4 days |
| Glass substrate+glass cover-plate | 5.4 | 8.3 | 8.6 | 9.5 |
| Flexible substrate+thin-film package | 3.8 | 5.4 | 6.0 | 6.1 |
As can be seen from Table 3, although the integral device efficiency of flexible device will lower than glass substrate device (this is because
Caused by device quality of forming film difference in flexible substrate), but active constituent is for the promotion effect and degree of device efficiency
Closely similar, for glass cover-plate packaged type after active constituent effect, resulting devices efficiency is promoted to 9.5% from 5.4%, mentions
Rise 76%；For thin-film package mode after active constituent effect, resulting devices efficiency is promoted to 6.1% from 3.8%, promotes 61%.
I.e. in the case where being suitable for the thin-film package mode of flexible substrate, the addition of active constituent is also that can achieve similar promotion device effect
The beneficial effect of rate.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of preparation method of luminescent device, which comprises the steps of:
Flexible substrate is provided, the flexible substrate is provided with QLED device；
The first composite membrane is formed in the QLED device surface using Barix encapsulation technology, first composite membrane is set by being laminated
The first resin film set and the first inorganic thin film composition, first resin film are formed in the QLED device surface, institute
It states in the first resin film and contains activating agent.
2. preparation method as described in claim 1, which is characterized in that further comprise the steps of: using Barix encapsulation technology, in institute
It states the first composite membrane superimposed layer and forms the second composite membrane of layer 1-7, the second resin that each second composite membrane is arranged by lamination is thin
Film and the second inorganic thin film composition；Wherein,
The first inorganic thin film being arranged in first composite membrane is laminated in the second resin film in the second composite membrane of first layer
Surface, the second resin film stacking in posterior second composite membrane are arranged in preceding second composite membrane second inorganic thin
Film surface is free of activating agent in each second resin film.
3. preparation method as described in claim 1, which is characterized in that the flexible substrate is selected from polyimides, is poly- to benzene two
In formic acid diethylester, polycarbonate, polyethylene naphthalate, polynorbornene, polyether sulfone and cyclic olefin polymer extremely
Few one kind；And/or
Resin in first resin film and each second resin film is selected from epoxy resin, phenolic resin and ureaformaldehyde tree
At least one of rouge；And/or
Inorganic material in first inorganic thin film and each second inorganic thin film is selected from aluminium oxide, silica and silicon nitride
At least one of.
4. preparation method as described in claim 1, which is characterized in that the activating agent is selected from saturated carboxylic acid and/or unsaturation
Carboxylic acid；And/or
In first resin film, the mass fraction of the activating agent is 5-40%.
5. preparation method as claimed in claim 4, which is characterized in that the saturated carboxylic acid is selected from acetic acid, propionic acid, butyric acid and different
At least one of butyric acid；And/or
The unsaturation carboxylic acid is selected from least one of acrylic acid, benzoic acid, butenoic acid and methacrylic acid.
6. preparation method as described in claim 1, which is characterized in that first resin film and each second resin are thin
Film with a thickness of 0.25-800 microns；And/or
First inorganic thin film and each second inorganic thin film with a thickness of 20-120 nanometers.
7. preparation method as claimed in any one of claims 1 to 6, which is characterized in that after depositing second composite membrane, also
Include the steps that heating.
8. preparation method as claimed in claim 7, which is characterized in that the temperature of the heat treatment is 50-90 DEG C；And/or
The time of the heat treatment is 1-48h.
9. a kind of luminescent device, which is characterized in that including flexible substrate and the QLED device being arranged in the flexible substrate, institute
It states and is provided with the first composite membrane on QLED device；First composite membrane is inorganic by the first resin film being stacked and first
Film composition, the first resin film setting contain activating agent in the QLED device surface, first resin film.
10. luminescent device as claimed in claim 9, which is characterized in that go back lamination on first composite membrane and be provided with layer 1-7
Second composite membrane, the second resin film and the second inorganic thin film that each second composite membrane is arranged by lamination form；Wherein,
The first inorganic thin film being arranged in first composite membrane is laminated in the second resin film in the second composite membrane of first layer
Surface, the second resin film stacking in posterior second composite membrane are arranged in preceding second composite membrane second inorganic thin
Film surface is free of activating agent in each second resin film.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013157495A1 (en) * | 2012-04-20 | 2013-10-24 | コニカミノルタ株式会社 | Organic electroluminescence element and production method for organic electroluminescence element |
| CN105552248A (en) * | 2016-01-26 | 2016-05-04 | 纳晶科技股份有限公司 | Package structure for electroluminescent device and package method for electroluminescent device |
| CN107148683A (en) * | 2013-12-12 | 2017-09-08 | 内诺光学有限公司 | Lift the positive aging effect of light emitting diode with quantum dots and the method and structure of stability |
-
2017
- 2017-12-15 CN CN201711351218.1A patent/CN109935734A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013157495A1 (en) * | 2012-04-20 | 2013-10-24 | コニカミノルタ株式会社 | Organic electroluminescence element and production method for organic electroluminescence element |
| CN107148683A (en) * | 2013-12-12 | 2017-09-08 | 内诺光学有限公司 | Lift the positive aging effect of light emitting diode with quantum dots and the method and structure of stability |
| CN105552248A (en) * | 2016-01-26 | 2016-05-04 | 纳晶科技股份有限公司 | Package structure for electroluminescent device and package method for electroluminescent device |
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Application publication date: 20190625 |