CN110504389A - A kind of preparation method of luminescent device, luminescent device and display panel - Google Patents
A kind of preparation method of luminescent device, luminescent device and display panel Download PDFInfo
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- CN110504389A CN110504389A CN201910749217.5A CN201910749217A CN110504389A CN 110504389 A CN110504389 A CN 110504389A CN 201910749217 A CN201910749217 A CN 201910749217A CN 110504389 A CN110504389 A CN 110504389A
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- 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
- H10K71/10—Deposition of organic active material
- H10K71/12—Deposition of organic active material using liquid deposition, e.g. spin coating
- H10K71/13—Deposition of organic active material using liquid deposition, e.g. spin coating using printing techniques, e.g. ink-jet printing or screen printing
- H10K71/135—Deposition of organic active material using liquid deposition, e.g. spin coating using printing techniques, e.g. ink-jet printing or screen printing using ink-jet printing
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Abstract
The present invention provides a kind of preparation method of luminescent device, luminescent device and display panel, solve the organic luminous layer made of inkjet printing in the prior art luminous efficiency is low and technical problem that the service life is short.The preparation method of luminescent device provided in an embodiment of the present invention, luminous organic material is sprayed in the one side of anode by the way of inkjet printing, and it joined the auxiliary agent that can be aligned under the irradiation of light in the ink of inkjet printing, since auxiliary agent can align under the irradiation of light, the Van der Waals force between organic molecule and auxiliary molecules in luminous organic material align luminous organic material also can, to increase the mobility of the electrons and holes in luminous organic material, and then improve the luminous efficiency and service life of luminescent device.
Description
Technical field
The present invention relates to field of display technology, and in particular to a kind of preparation method of luminescent device, luminescent device and aobvious
Show panel.
Background technique
Since inkjet printing technology has the advantages that simple process and at low cost, this technology have become preparation OLED hair
One of the conventional selection of organic luminous layer in optical device.But the organic luminous layer made of inkjet printing exists more at present
The problem that luminous efficiency is low and the service life is short, this seriously inhibits the universal of inkjet printing technology.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of preparation method of luminescent device, luminescent device and display surfaces
Plate solves the technology that the organic luminous layer made of inkjet printing is low there are luminous efficiency in the prior art and the service life is short and asks
Topic.
For the purpose of the present invention, technological means and advantage is more clearly understood, below in conjunction with attached drawing to the present invention make into
One step is described in detail.Obviously, the described embodiments are only a part but not all of the embodiments of the present application.Base
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall in the protection scope of this application.
According to an aspect of the present invention, one embodiment of the invention provides a kind of preparation method of luminescent device, comprising: In
Luminescent material ink is sprayed in first electrode；Light irradiation is carried out to the luminescent material ink of spraying on the first electrode；It is right
Luminescent material ink after light irradiates is dried, and one layer of luminescent layer is formed；And in the luminescent layer far from described
It is formed and the opposite polarity second electrode of the first electrode in the one side of one electrode；Wherein, the luminescent material ink includes
Luminous organic material and auxiliary agent, the auxiliary agent align under the irradiation of light.
In an embodiment of the present invention, the first electrode is anode, and the second electrode is cathode.
In an embodiment of the present invention, the auxiliary agent includes: the first auxiliary agent, including the high score containing ultraviolet light photosensitive group
Sub- material；And/or second auxiliary agent, including the high molecular material containing visible light photosensitive group.
In an embodiment of the present invention, first auxiliary agent includes one or more of following material combination: polyamides
Imines, three pyridine ring based polyalcohols, to polymethylacrylic acid cinnamoyl 2-ethoxyethyl acetate；And/or second auxiliary agent includes following material
One or more of material combination: fragrant ketone-type photoinitiators, α, the derivative photoinitiator of alpha, beta-unsaturated ketone.
In an embodiment of the present invention, the fragrant ketone-type photoinitiators include one or more of following material group
It closes: polycyclic aromatic ketone-type photoinitiators, heteroaromatic ketone-type photoinitiators.
In an embodiment of the present invention, the luminescent material ink of described pair of spraying on the first electrode carries out illumination
It penetrates, specifically includes: the luminescent material ink of spraying on the first electrode being irradiated with the light of preset direction.
In an embodiment of the present invention, before the step of spraying luminescent material ink on the first electrode, the method is also
It include: to spray hole-injecting material ink on the first electrode, the hole-injecting material ink includes the auxiliary agent；To being sprayed
The hole-injecting material ink of painting carries out light irradiation；Hole-injecting material ink after light irradiates is dried, is formed
One layer of hole injection layer；Hole mobile material ink is sprayed in one side of the hole injection layer far from the first electrode,
The hole mobile material ink includes the auxiliary agent；Light irradiation is carried out to the hole transport ink sprayed；To by illumination
Hole mobile material ink after penetrating is dried, and one layer of hole transmission layer is formed；It is described to spray the material that shines on the first electrode
Expect ink the step of, specifically include: be located at the first electrode on hole transmission layer far from the hole injection layer one
Luminescent material ink is sprayed on face.
In an embodiment of the present invention, after the step of being dried to the luminescent material ink after light irradiates, In
The step of second electrode opposite polarity with the first electrode is formed in one side of the luminescent layer far from the first electrode
Before, the method also includes: in one side of the luminescent layer far from the first electrode spray electron transport material ink,
The electron transport material ink includes the auxiliary agent；Light irradiation is carried out to the electron transport material ink sprayed；To process
Electron transport material ink after light irradiation is dried, and one layer of electron transfer layer is formed；In electron transfer layer far from the hair
Electron injection material ink is sprayed in the one side of photosphere, the electron injection material ink includes the auxiliary agent；To what is sprayed
Electron injection ink carries out light irradiation；Electron injection material ink after light irradiates is dried, one layer of electronics is formed
Implanted layer；The formation in one side of the luminescent layer far from first electrode and the opposite polarity second electrode of the first electrode,
It specifically includes: forming second electrode far from the one side of the luminescent layer in the electron injecting layer.
According to another aspect of the present invention, one embodiment of the invention provides a kind of luminescent device, comprising: the first electricity
Pole；The luminescent layer of the first electrode side is set；And the luminescent layer is set far from the first electrode side
Cathode；Wherein, the luminescent layer includes luminous organic material, and the luminous organic material aligns.
According to the third aspect of the invention we, one embodiment of the invention provides a kind of display panel, including substrate and sets
Luminescent device on the substrate is set, wherein the structure of luminescent device uses the structure of the luminescent device as described in aforementioned.
The preparation method of luminescent device provided in an embodiment of the present invention, by luminous organic material by the way of inkjet printing
Spraying on the first electrode, and joined the auxiliary agent that can be aligned under the irradiation of light in the ink of inkjet printing, by
It can be aligned under the irradiation of light in auxiliary agent, the Van der Waals between organic molecule and auxiliary molecules in luminous organic material
Power align luminous organic material also can, to increase the migration of the electrons and holes in luminous organic material
Rate, and then improve the luminous efficiency and service life of luminescent device.
Detailed description of the invention
Fig. 1 show a kind of flow diagram of the preparation method of luminescent device of one embodiment of the invention offer；
Fig. 2 show the schematic diagram of auxiliary agent when light irradiates ink in one embodiment of the invention in ink aligned；
It is organic in the luminescent layer that ink is formed after Fig. 3 show light irradiation ink in one embodiment of the invention and dries
The schematic diagram of luminescent material aligned；
Fig. 4 show a kind of structural schematic diagram of luminescent device of one embodiment of the invention offer.
Specific embodiment
As described in background, the luminescent layer in luminescent device in the prior art is formed through inkjet printing, but is sent out
The luminous efficiency of photosphere is low and service life is short, and inventor is to beat through ink-jet the study found that there is the reason of this problem
Print and formed luminescent layer in luminous organic material arrangement mode it is disorderly and unsystematic, so as to cause in luminous organic material
The mobility of electrons and holes reduces, therefore reduces the luminous efficiency of luminescent layer and shorten the service life of luminescent layer.
Based on this, the present invention provides a kind of preparation methods of luminescent device, the ink in inkjet printing luminescent layer
In joined auxiliary agent, which can align under the irradiation of light, so that the organic molecule in luminous organic material
Van der Waals force between auxiliary molecules align luminous organic material also can, to increase luminous organic material
In electrons and holes mobility, and then improve the luminous efficiency and service life of luminescent device.
Specifically, a kind of preparation method of luminescent device provided by the invention, comprising: spray the material that shines on the first electrode
Expect ink；Light irradiation is carried out to the luminescent material ink of spraying on the first electrode；To the luminous material after light irradiates
Material ink is dried, and one layer of luminescent layer is formed；And in one side of the luminescent layer far from the first electrode formed with
The opposite polarity second electrode of first electrode；Wherein, the luminescent material ink includes luminous organic material and auxiliary agent,
The auxiliary agent aligns under the irradiation of light.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that the described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Based on this
Embodiment in invention, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, shall fall within the protection scope of the present invention.
Fig. 1 show a kind of preparation method of luminescent device of one embodiment of the invention offer, as shown in Figure 1, photophore
The preparation method of part includes:
S101: luminescent material ink is sprayed on the first electrode；
Before spraying ink on the first electrode, luminescent material ink is configured, ink includes the organic hair to form luminescent layer
Luminescent material and the auxiliary agent aligned under light illumination.
S102: light irradiation is carried out to the luminescent material ink of spraying on the first electrode；
It include luminous organic material in step S102, in luminescent material ink and what is aligned under light illumination help
Agent, when carrying out light irradiation to the ink of spraying on the first electrode, auxiliary molecules align under illumination irradiation, organic light emission
The Van der Waals force between organic molecule and auxiliary molecules in material align luminous organic material also can.
S103: drying the ink after light irradiates, and forms one layer of luminescent layer.
Ink after light irradiates is dried, auxiliary molecules volatilization, luminous organic material forms luminescent layer.
In step S103, if auxiliary molecules volatilization is incomplete, it is more likely that certain influence is generated to luminescent layer, because
Auxiliary agent in ink is preferably all evaporated completely when drying to the ink after light irradiation by this in step S104
Entirely.
S104: it is formed and the opposite polarity second electrode of first electrode in one side of the luminescent layer far from first electrode.
The preparation method of luminescent device provided in an embodiment of the present invention is sprayed on the first electrode when with the method for inkjet printing
After applying luminescent material ink, light irradiation is carried out to luminescent material ink first, is then dried again, due to luminescent material ink
In containing the auxiliary agent that aligns under light illumination, auxiliary molecules can align under the irradiation of light, as shown in Fig. 2, because
This, the Van der Waals force between the organic molecule 21 in luminous organic material and auxiliary molecules 22 makes luminous organic material also can
It aligns, the auxiliary agent when drying in luminescent material ink is evaporated completely full-time, and luminous organic material molecule in luminescent layer is fixed
To arrangement, as shown in figure 3, so as to form the luminescent layer with orientation, thus increase electronics in luminous organic material and
The mobility in hole, and then improve the luminous efficiency and service life of luminescent device.
In an embodiment of the present invention, auxiliary agent includes the first auxiliary agent, and the first auxiliary agent includes containing ultraviolet light photosensitive group
Polymerization reaction occurs under ultraviolet irradiation for macromolecule, ultraviolet light photosensitive group, and the branched group of the polymer of formation is to height
Molecule auxiliary agent, which has, aligns effect, and there are Van der Waals forces between luminous organic material molecule and auxiliary agent, therefore, You Jifa
Luminescent material molecule also aligns under the action of Van der Waals force, to increase the electrons and holes in luminous organic material
Mobility, and then improve the luminous efficiency and service life of luminescent device.
In a further embodiment of the invention, the first auxiliary agent includes the combination of one or more of following material:
Polyimides, three pyridine ring based polyalcohols, to polymethylacrylic acid cinnamoyl 2-ethoxyethyl acetate.Wherein polyimides, three pyridine ring groups
Polymer is on macromolecular chain containing ultraviolet light photosensitive group, ultraviolet to polymethylacrylic acid cinnamoyl 2-ethoxyethyl acetate
Polymerization reaction occurs under ultraviolet irradiation for quick group, and the branched group of the polymer of formation is to polyimides, three pyridine rings
Based polyalcohol arranges polymethylacrylic acid cinnamoyl 2-ethoxyethyl acetate molecular orientation, and the luminous organic material molecule in luminescent layer
There are Van der Waals forces between auxiliary agent, and therefore, luminous organic material molecule also aligns under the action of Van der Waals force, thus
The mobility of the electrons and holes in luminous organic material is increased, and then improves the luminous efficiency of luminescent device and uses the longevity
Life.
It should be appreciated that the high molecular type containing ultraviolet photosensitive group and quantity that the first auxiliary agent includes can bases
Depending on practical application scene, such as the first auxiliary agent can only include the polyimides containing photosensitive group on macromolecular chain, can also
It can also include on macromolecular chain containing photosensitive only to include the three pyridine ring based polyalcohols containing photosensitive group on macromolecular chain
Three pyridine ring based polyalcohols on the polyimides and macromolecular chain of group containing photosensitive group.Therefore, as long as the first auxiliary agent
In include the macromolecule containing photosensitive group on macromolecular chain, the embodiment of the present invention contains light for what the first auxiliary agent included
The high molecular weight species and quantity of quick group are not construed as limiting.
In an embodiment of the present invention, illumination step S102: is carried out to the luminescent material ink of spraying on the first electrode
Penetrate includes: to carry out light irradiation to the luminescent material ink of spraying on the first electrode with the light of preset direction.And the preset direction
Can be depending on practical application scene, for example, working as practical application scene demand luminescent layer is oriented layer, and the angle oriented is
α, α are the angle between orientation and the length direction of luminescent layer, as shown in Figure 3.So in the light using preset direction to spraying
When luminescent material ink on the first electrode carries out light irradiation, the angle between light and the length direction of luminescent layer is then α,
As shown in Figure 2.α can be 30 °, be also possible to 20 °, be also possible to 90 °, the specific angular values of α can be according to the actual situation
Setting, the embodiment of the present invention are not construed as limiting the specific angular values of α.
The type for the light that light irradiation uses, light are carried out to the luminescent material ink of spraying on the first electrode as in S103
The wave band of the light used when irradiation and the irradiation condition (such as light application time) of illumination can depending on practical application scene,
The embodiment of the present invention is for the type of used light, the wave band of light and light irradiation condition are not made when light irradiation in step S102
It limits.
In a further embodiment of the invention, when the first auxiliary agent includes the macromolecule containing ultraviolet photosensitive group,
Step S102: carrying out light irradiation to spraying luminescent material ink on the first electrode includes: using ultraviolet light to being sprayed on the
Luminescent material ink on one electrode carries out light irradiation.High molecular first auxiliary agent containing ultraviolet photosensitive group is in ultraviolet light
It can be aligned under irradiation, and the luminous organic material molecule in luminescent layer and there are Van der Waals forces between auxiliary agent, therefore, have
Machine luminescent material molecule also aligns under the action of Van der Waals force, to increase the electronics and sky in luminous organic material
The mobility in cave, and then improve the luminous efficiency and service life of luminescent device.
In an alternative embodiment of the invention, auxiliary agent includes the second auxiliary agent, and the second auxiliary agent includes containing visible light photosensitive group
Macromolecule, it is seen that polymerization reaction occurs under the irradiation of visible light for photosensitive group, and the branched group of the polymer of formation is to height
Molecule auxiliary agent, which has, aligns effect, and there are Van der Waals forces between luminous organic material molecule and auxiliary agent, therefore, You Jifa
Luminescent material molecule also aligns under the action of Van der Waals force, to increase the electrons and holes in luminous organic material
Mobility, and then improve the luminous efficiency and service life of luminescent device.
In a further embodiment of the invention, the second auxiliary agent includes the combination of one or more of following material:
Fragrant ketone-type photoinitiators, α, the derivative photoinitiator of alpha, beta-unsaturated ketone.
Wherein fragrant ketone-type photoinitiators, α, the derivative photoinitiator of alpha, beta-unsaturated ketone are on macromolecular chain containing can
See photosensitive group, it is seen that polymerization reaction, the branched group pair of the polymer of formation occur under the irradiation of visible light for photosensitive group
Fragrant ketone-type photoinitiators, α, alpha, beta-unsaturated ketone derivative photoinitiator molecules align, and the organic light emission in luminescent layer
There are Van der Waals forces between material molecule and auxiliary agent, and therefore, luminous organic material molecule also orients under the action of Van der Waals force
Arrangement, to increase the mobility of the electrons and holes in luminous organic material, and then improves the luminous effect of luminescent device
Rate and service life.
It should be appreciated that the high molecular type and quantity containing visible light-sensitive group that the second auxiliary agent includes can bases
Depending on practical application scene, such as the second auxiliary agent can be only light-initiated including the fragrant ketone containing photosensitive group on macromolecular chain
Agent can also only include containing on macromolecular chain, α, and the derivative photoinitiator of alpha, beta-unsaturated ketone can also include on macromolecular chain
Fragrant ketone containing photosensitive group on the derivative photoinitiator of alpha, beta-unsaturated ketone containing photosensitive group and macromolecular chain
Photoinitiator.Therefore, as long as in the second auxiliary agent including the macromolecule containing photosensitive group on macromolecular chain, the present invention is implemented
The high molecular weight species containing photosensitive group and quantity that example includes for the second auxiliary agent are not construed as limiting.
Preferably, fragrant ketone-type photoinitiators include one or more of following material combination: polycyclic aromatic ketone
Photoinitiator, heteroaromatic ketone-type photoinitiators.
In an of the invention further embodiment, when the second auxiliary agent include containing can be by the macromolecule of photosensitive group when,
Step S102: carrying out light irradiation to spraying luminescent material ink on the first electrode includes: using visible light to being sprayed on the
Luminescent material ink on one electrode carries out light irradiation.High molecular second auxiliary agent containing visible light-sensitive group is in visible light
It can be aligned under irradiation, and the luminous organic material molecule in luminescent layer and there are Van der Waals forces between auxiliary agent, therefore, have
Machine luminescent material molecule also aligns under the action of Van der Waals force, to increase the electronics and sky in luminous organic material
The mobility in cave, and then improve the luminous efficiency and service life of luminescent device.
Mentioned-above auxiliary agent may include the first auxiliary agent, that is, includes the macromolecule containing ultraviolet photosensitive group, work as auxiliary agent
When including the first auxiliary agent, light irradiation is carried out to the ink being sprayed in anode one side using ultraviolet light.Auxiliary agent can also include the
Two auxiliary agents include the macromolecule containing visible light-sensitive group, when auxiliary agent includes the second auxiliary agent, using visible light to being sprayed on
Luminescent material ink in first electrode carries out light irradiation.But the macromolecule not office that the auxiliary agent in the embodiment of the present invention includes
Be limited to this, such as auxiliary agent had both included the first auxiliary agent or including the second auxiliary agent, no matter using ultraviolet light or visible light to being sprayed on
Luminescent material ink in first electrode, which carries out light irradiation, can make auxiliary molecules align, and luminous organic material point
There are Van der Waals forces between son and auxiliary agent, and therefore, luminous organic material molecule also aligns under the action of Van der Waals force, from
And the mobility of the electrons and holes in luminous organic material is increased, and then improve the luminous efficiency and use of luminescent device
Service life.
In an embodiment of the present invention, first electrode is anode, and second electrode is cathode, and luminescent device includes: successively folded
The anode set, hole injection layer, hole transmission layer, luminescent layer, electron transfer layer, electron injecting layer and cathode are added, the hair
The preparation method of optical device includes:
Step S201: anode is prepared；
Step S202: hole-injecting material ink is sprayed on anode, hole-injecting material ink includes auxiliary agent；
Step S203: light irradiation is carried out to the hole-injecting material ink sprayed；
Step S204: drying the hole-injecting material ink after light irradiates, and forms one layer of hole injection layer；
Step S205: hole mobile material ink is sprayed on hole injection layer, hole mobile material ink includes auxiliary agent；
Step S206: light irradiation is carried out to the hole transport ink sprayed；
Step S207: drying the hole mobile material ink after light irradiates, and forms one layer of hole transmission layer；
Step S208: in the upper spraying luminescent material ink of hole transmission layer；
Step S209: light irradiation is carried out to the luminescent material ink sprayed；
Step S2010: drying the luminescent material ink after light irradiates, and forms one layer of luminescent layer；
Step S2011: electron transport material ink, electron-transport are sprayed in one side of the luminescent layer far from hole transmission layer
Material ink includes auxiliary agent；
Step S2012: light irradiation is carried out to the electron transport material ink sprayed；
Step S2013: drying the electron transport material ink after light irradiates, and forms one layer of electron-transport
Layer；
Step S2014: electron injection material ink, electronics are sprayed in one side of the electron transfer layer far from electron transfer layer
Injection material ink includes auxiliary agent；
Step S2015: light irradiation is carried out to the electron injection ink sprayed；
Step S2016: drying the electron injection material ink after light irradiates, and forms one layer of electron injection
Layer；
Step S2017: second electrode is formed far from the one side of electron transfer layer in electron injecting layer.
Wherein, hole-injecting material ink, hole mobile material ink, luminescent material ink, electron transport material ink,
The specific type for the auxiliary agent for including in electron injection material ink can be no longer repeated herein as aforementioned described.
Certainly, in other embodiments of the invention, first electrode may be cathode, and second electrode is anode, shine
Device includes: the cathode for being sequentially overlapped setting, cathode implanted layer, cathode transport layer, luminescent layer, hole transmission layer, hole injection
Layer and anode, the preparation method of the luminescent device is same as the previously described embodiments, no longer repeats herein.
The luminescent device of the embodiment of the present invention is preparing the hole injection layer in luminescent device, hole transmission layer, is shining
When the preparation of organic films such as layer, electron transfer layer and electron injecting layer, it is all made of the mode that auxiliary agent adds light to irradiate, every layer
The organic material of organic film can align, to further increase the mobility of hole and electronics, and then improve
The luminous efficiency and service life of luminescent device.
Step S203, in S206, S209 and S2012, the type of used light when being irradiated to different inks
The auxiliary agent for including with corresponding ink is corresponding, such as includes in the type and hole-injecting material ink of the light used in S203
Auxiliary agent type it is corresponding, when the auxiliary agent for including in hole-injecting material ink contains the macromolecule material of ultraviolet light photosensitive group
When material, light employed in step S203 is then ultraviolet light.The type and hole mobile material of the light used in also such as S206
The type for the auxiliary agent for including in ink is corresponding, when the auxiliary agent for including in hole mobile material ink contains visible light-sensitive group
When high molecular material, light employed in step S206 is then visible light.Therefore, if step S203, S206, S209 and
In S2012, the type of used light is corresponding with the auxiliary agent type in corresponding ink when being irradiated to ink,
The present invention is not in step S203, S206, S209 and S2012, the type of used light is made when being irradiated to ink
It is specific to limit.
As another aspect of the present invention, one embodiment of the invention provides a kind of luminescent device, and the luminescent device is by preceding
The preparation method for stating the luminescent device is formed, which includes anode 1, and the luminescent layer of anode side is arranged in
2 and cathode 3 of the luminescent layer 2 far from 1 side of anode is set, as shown in Figure 4.Wherein, luminescent layer 2 includes organic light emission material
Material, luminous organic material align.Inkjet printing shape is used in luminescent layer in luminescent device provided in an embodiment of the present invention
At forming, after spraying ink in the one side of anode with the method for inkjet printing, light irradiation is carried out to ink first, then again
It is dried, since, containing the auxiliary agent aligned under light illumination, auxiliary molecules can be under the irradiation of light, the row of orientation in ink
Column, therefore, the Van der Waals force between organic molecule and auxiliary molecules in luminous organic material makes luminous organic material also can
It enough aligns, to increase the mobility of the electrons and holes in luminous organic material, and then improves luminescent device
Luminous efficiency and service life.
As another aspect of the present invention, the embodiment of the invention also provides a kind of display panels, comprising: substrate；And
Luminescent device on the substrate is set；Wherein, the structure of the luminescent device uses the knot of the aforementioned luminescent device
Structure.It is formed in the luminescent layer of the luminescent device in display panel in the embodiment of the present invention using inkjet printing, when with spray
After the method for ink printing sprays ink in the one side of anode, light irradiation is carried out to ink first, is then dried again, due to
Containing the auxiliary agent aligned under light illumination in ink, auxiliary molecules can align under the irradiation of light, therefore, organic
The Van der Waals force between organic molecule and auxiliary molecules in luminescent material align luminous organic material also can, from
And the mobility of the electrons and holes in luminous organic material is increased, and then improve the luminous efficiency and use of luminescent device
Service life.
The foregoing is merely the preferred embodiments of the invention, are not intended to limit the invention creation, all at this
Within the spirit and principle of innovation and creation, made any modification, equivalent replacement etc. should be included in the protection of the invention
Within the scope of.
Claims (10)
1. a kind of preparation method of luminescent device characterized by comprising
Luminescent material ink is sprayed on the first electrode；
Light irradiation is carried out to the luminescent material ink of spraying on the first electrode；
Luminescent material ink after light irradiates is dried, one layer of luminescent layer is formed；And
It is formed and the opposite polarity second electrode of the first electrode in one side of the luminescent layer far from the first electrode；
Wherein, the luminescent material ink includes luminous organic material and auxiliary agent, auxiliary agent row of orientation under the irradiation of light
Column.
2. preparation method as described in claim 1, which is characterized in that the first electrode is anode, and the second electrode is
Cathode.
3. preparation method according to claim 1, which is characterized in that the auxiliary agent includes:
First auxiliary agent, including the high molecular material containing ultraviolet light photosensitive group；And/or
Second auxiliary agent, including the high molecular material containing visible light photosensitive group.
4. preparation method according to claim 3, which is characterized in that first auxiliary agent includes one of following material
Or multiple combinations: polyimides, three pyridine ring based polyalcohols, to polymethylacrylic acid cinnamoyl 2-ethoxyethyl acetate；And/or
Second auxiliary agent includes one or more of following material combination: fragrant ketone-type photoinitiators, α, β-unsaturation
Ketone derivatives photoinitiator.
5. the preparation method according to claim 4, which is characterized in that the fragrance ketone-type photoinitiators include following material
One or more of combination: polycyclic aromatic ketone-type photoinitiators, heteroaromatic ketone-type photoinitiators.
6. preparation method according to claim 1, which is characterized in that described pair spraying on the first electrode shine
Material ink carries out light irradiation, specifically includes:
The luminescent material ink of spraying on the first electrode is irradiated with the light of preset direction.
7. preparation method according to claim 2, which is characterized in that spray the step of luminescent material ink on the first electrode
Before rapid, the method also includes:
Hole-injecting material ink is sprayed on the first electrode, and the hole-injecting material ink includes the auxiliary agent；
Light irradiation is carried out to the hole-injecting material ink sprayed；
Hole-injecting material ink after light irradiates is dried, one layer of hole injection layer is formed；
Hole mobile material ink, the hole transport are sprayed in one side of the hole injection layer far from the first electrode
Material ink includes the auxiliary agent；
Light irradiation is carried out to the hole transport ink sprayed；
Hole mobile material ink after light irradiates is dried, one layer of hole transmission layer is formed；
It described the step of spraying luminescent material ink on the first electrode, specifically includes:
The spraying luminescent material ink in one side of the hole transmission layer far from the hole injection layer being located in the first electrode
Water.
8. preparation method according to claim 2, which is characterized in that
After the step of being dried to the luminescent material ink after light irradiates, in the luminescent layer far from first electricity
Before the step of forming second electrode opposite polarity with the first electrode in the one side of pole, the method also includes:
Electron transport material ink, the electron transport material are sprayed in one side of the luminescent layer far from the first electrode
Ink includes the auxiliary agent；
Light irradiation is carried out to the electron transport material ink sprayed；
Electron transport material ink after light irradiates is dried, one layer of electron transfer layer is formed；
Electron injection material ink, the electron injection material are sprayed in one side of the electron transfer layer far from the luminescent layer
Expect that ink includes the auxiliary agent；
Light irradiation is carried out to the electron injection ink sprayed；
Electron injection material ink after light irradiates is dried, one layer of electron injecting layer is formed；
The formation in one side of the luminescent layer far from first electrode and the opposite polarity second electrode of the first electrode, specifically
Include:
Second electrode is formed far from the one side of the luminescent layer in the electron injecting layer.
9. a kind of luminescent device characterized by comprising
First electrode；
The luminescent layer of the first electrode side is set；And
Second electrode of the luminescent layer far from the first electrode side is set；
Wherein, the luminescent layer includes luminous organic material, the luminous organic material molecular orientation arrangement.
10. a kind of display panel characterized by comprising
Substrate；And
Luminescent device on the substrate is set；
Wherein, the structure of the luminescent device uses the structure of luminescent device as claimed in claim 9.
Priority Applications (1)
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