CN105932171A - Organic electroluminescent device, and manufacturing method and display device thereof - Google Patents
Organic electroluminescent device, and manufacturing method and display device thereof Download PDFInfo
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- CN105932171A CN105932171A CN201610539375.4A CN201610539375A CN105932171A CN 105932171 A CN105932171 A CN 105932171A CN 201610539375 A CN201610539375 A CN 201610539375A CN 105932171 A CN105932171 A CN 105932171A
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- H10K50/00—Organic light-emitting devices
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Abstract
The invention provides an organic electroluminescent device. The organic electroluminescent device comprises a substrate, a first electrode, a light emitting layer and a second electrode, wherein the first electrode is arranged over the substrate; the light emitting layer is arranged over the first electrode; the second electrode is arranged over the light emitting layer; one of the first electrode and the second electrode is a reflecting electrode; the other one is a semi-permeable and semi-reflecting electrode; therefore, an optical micro-cavity is formed between the first electrode and the second electrode; and the organic electroluminescent device is characterized by further comprising an electrostrictive layer positioned between the first electrode and the second electrode. Correspondingly, the invention further provides a manufacturing method and a display device of the organic electroluminescent device. The light colour of the organic electroluminescent device can be adjusted; and thus, the display effect of the display device can be improved.
Description
Technical field
The present invention relates to Display Technique field, be specifically related to a kind of organic electroluminescence device and
Its manufacture method, display device.
Background technology
Organic electroluminescence device (Organic Light-Emitting Device, OLED) has
Active illuminating, good temp characteristic, power consumption are little, response is fast, visual angle width, ultra-thin and low cost
Etc. advantage, it is widely used in display device.Organic light emitting display includes: negative electrode,
Anode and organic function layer positioned there between, wherein, organic function layer generally includes hole
Implanted layer, hole transmission layer, luminescent layer, electron transfer layer, electron injecting layer etc..Work as negative electrode
With when applying voltage on anode, hole and the electronics of negative electrode offer that anode provides are multiple at luminescent layer
Closing, thus emit beam, organic electroluminescence device can be divided into top luminescence according to light direction
Type and end light emitting-type.
At present, after existing organic electroluminescence device completes, the ripple of its light sent
Length is also changeless, i.e. the light color of organic electroluminescence device is non-adjustable, thus
Limit the display effect of display device.
Summary of the invention
It is contemplated that at least solve one of technical problem present in prior art, it is proposed that
A kind of organic electroluminescence device and preparation method thereof, display device, so that organic electroluminescence is sent out
The light color of light display device is adjustable, thus improves the display effect of display device.
In order to solve one of above-mentioned technical problem, the present invention provides a kind of organic electroluminescence
Part, including substrate, is arranged on the first electrode above substrate, setting on the first electrode
The luminescent layer of side, it is arranged on the second electrode above described luminescent layer, described first electrode and the
One in two electrodes is reflecting electrode, and another one is semi-transparent semi-reflecting electrode, so that described first
Forming optical microcavity between electrode and described second electrode, described organic electroluminescence device also wraps
Include the electrostrictive layer between described first electrode and described second electrode.
Preferably, the material forming described electrostrictive layer includes electroactive polymer.
Preferably, described organic electroluminescence device also include being arranged on described first electrode with
Between described second electrode: electron injecting layer, hole injection layer and hole transmission layer；
Described electron injecting layer, described electrostrictive layer, described luminescent layer, described hole pass
Defeated layer, described hole injection layer are sequentially stacked along the direction away from described substrate.
Preferably, described organic electroluminescence device also includes being arranged on described luminescent layer and electricity
Causing the 3rd electrode between stretchable layer, described 3rd electrode is semi-transparent semi-reflecting electrode.
Preferably, described organic electroluminescence device also includes being arranged on described 3rd electrode
Insulating barrier and the 4th electrode that is arranged on described insulating barrier, described electrostrictive layer is arranged on
On described 4th electrode, described 4th electrode is semi-transparent semi-reflecting electrode.
Preferably, described organic electroluminescence device also include being arranged on described first electrode with
Between described 3rd electrode: electron injecting layer, electron transfer layer, hole injection layer and hole
Transport layer；
Described hole injection layer, described hole transmission layer, described luminescent layer, described electronics pass
Defeated layer and described electron injecting layer are sequentially stacked along the direction away from described substrate.
Preferably, described organic electroluminescence device also include being arranged on described first electrode with
Electron injecting layer, electron transfer layer, hole injection layer and hole between described 3rd electrode pass
Defeated layer；
Described electron injecting layer, described electron transfer layer, described luminescent layer, described hole pass
Defeated layer and described hole injection layer are sequentially stacked along the direction away from described substrate.
Correspondingly, the present invention also provides for the manufacture method of a kind of organic electroluminescence device, bag
Include following steps:
Substrate is provided；
The most square one-tenth the first electrode；
The most square one-tenth luminescent layer；
The most square one-tenth electrostrictive layer；
Form the second electrode, and make described luminescent layer and described electrostrictive layer be respectively positioned on institute
State between the first electrode and described second electrode；
Wherein, the one in described first electrode and described second electrode is reflecting electrode, another
One is semi-transparent semi-reflecting electrode, so that forming light between described first electrode and described second electrode
Learn microcavity.
Preferably, the step forming electrostrictive layer includes:
Spin coating electroactive polymer solution, to form layer of electroactive polymer.
Preferably, formed between the step of luminescent layer and the step forming electrostrictive layer and also wrap
Include following steps:
Form the 3rd electrode；Wherein, described 3rd electrode is semi-transparent semi-reflecting electrode.
Preferably, after forming the step of the 3rd electrode, further comprising the steps of:
Sequentially forming insulating barrier and the 4th electrode, wherein, described 4th electrode is semi-transparent semi-reflecting
Electrode；
Formed electrostrictive layer step sequentially form insulating barrier and the 4th electrode step it
After carry out.
Correspondingly, the present invention also provides for a kind of display device, including the present invention provide above-mentioned
Organic electroluminescence device.
In the organic electroluminescence device that the present invention provides, the first electrode and the second electrode it
Between be provided with electrostrictive layer, when two electrodes up and down of electrostrictive layer apply polarity phase respectively
During the anti-signal of telecommunication, the electric field between two electrodes makes the thickness of electrostrictive layer change, from
And the chamber length of organic electroluminescence device is changed accordingly, and then luminescent layer is sent
Light color changes, therefore, by the field intensity of regulation electrostrictive layer place electric field, and can
So that described organic electroluminescence device sends different colors, so that include described organic
The colour gamut of the display device of electroluminescent device is wider, and display effect is more preferable.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the one of description
Part, is used for explaining the present invention together with detailed description below, but is not intended that this
The restriction of invention.In the accompanying drawings:
Fig. 1 is the first structural representation of the organic electroluminescence device that the present invention provides；
Fig. 2 is the second structural representation of the organic electroluminescence device that the present invention provides；
Fig. 3 is the third structural representation of the organic electroluminescence device that the present invention provides；
Fig. 4 is the 4th kind of structural representation of the organic electroluminescence device that the present invention provides；
Fig. 5 is the 5th kind of structural representation of the organic electroluminescence device that the present invention provides；
Fig. 6 is that the thickness of electrostrictive layer changes schematic diagram with electric field intensity；
Fig. 7 is the first the manufacture method flow process of the organic electroluminescence device that the present invention provides
Figure；
Fig. 8 is the second manufacture method flow process of the organic electroluminescence device that the present invention provides
Figure；
Fig. 9 is the third manufacture method flow process of the organic electroluminescence device that the present invention provides
Figure；
Figure 10 is the 4th kind of manufacture method flow process of the organic electroluminescence device that the present invention provides
Figure；
Figure 11 is the 5th kind of manufacture method flow process of the organic electroluminescence device that the present invention provides
Figure.
Wherein, reference is:
10, substrate；11, the first electrode；12, the second electrode；13, luminescent layer；14、
Electrostrictive layer；15, electron injecting layer；16, hole injection layer；17, hole transmission layer；
18, the 3rd electrode；19, electron transfer layer；20, insulating barrier；21, the 4th electrode.
Detailed description of the invention
Below in conjunction with accompanying drawing, the detailed description of the invention of the present invention is described in detail.Should manage
Solving, detailed description of the invention described herein is merely to illustrate and explains the present invention, not
For limiting the present invention.
As an aspect of of the present present invention, it is provided that a kind of organic electroluminescence device, such as Fig. 1 extremely
Shown in Fig. 5, described organic electroluminescence device includes substrate 10, is arranged on above substrate 10
The first electrode 11, be arranged on the luminescent layer 13 above the first electrode 13, be arranged on luminescent layer
The second electrode 12 above in the of 13, the one in the first electrode 11 and the second electrode 12 is reflection
Electrode, another one is semi-transparent semi-reflecting electrode, so that between the first electrode 11 and the second electrode 12
Forming optical microcavity, wherein, described organic electroluminescence device also includes being positioned at the first electrode
11 and second electrostrictive layers 14 between electrode 12.
It should be appreciated that the thickness of at least electrostrictive layer 14 can be with its place electric field
Field intensity changes and changes.It is not provided with other electrodes between the first electrode 11 and the second electrode 12
Time, the thickness of electrostrictive layer 14 can be with electricity between the first electrode 11 and the second electrode 12
The field intensity of field changes and changes, and is additionally provided with it between the first electrode 11 and the second electrode 12
During his electrode, the thickness of electrostrictive layer 14 can be with closest two electricity in its upper and lower both sides
Between pole, the field intensity of electric field changes and changes.
It should be noted that " top " in the present invention all represents the top in Fig. 1.Institute
Stating " semi-transparent semi-reflecting electrode " to refer to, it is possible to a part for light passed through, another part reflects
Going back, the transmitance of semi-transparent semi-reflecting electrode can be between 70%～90%.When the first electrode 11
With second when being not provided with other electrodes between electrode 12, the first electrode 11 and the second electrode 12
In one be negative electrode, another one is anode.For just putting type organic electroluminescence device, the
One electrode 11 be anode, the second electrode 12 be negative electrode；For inversion type organic electroluminescence
Part, the first electrode 11 be negative electrode, the second electrode 12 be anode；The Organic Electricity illuminated end of for
Electroluminescence device, the first electrode 11 be semi-transparent semi-reflecting electrode, the second electrode 12 be reflecting electrode；
For pushing up illuminated organic electroluminescence device, the first electrode 11 is reflecting electrode, the second electricity
Pole 12 is semi-transparent semi-reflecting electrode.
Can produce microcavity effect during organic electroluminescence device luminescence, the chamber length of microcavity can be to light
The wavelength of line produces impact, thus affects the color of light.In prior art, work as organic electroluminescence
After luminescent device makes, chamber is a length of fixing, thus causes organic electroluminescence device institute
The light color sent also is changeless.And the organic electroluminescence device that the present invention provides
In, it is provided with electrostrictive layer 14, such as Fig. 6 between the first electrode 11 and the second electrode 12
Shown in, when two electrodes up and down of electrostrictive layer 14 apply the opposite polarity signal of telecommunication respectively
Time, the electric field between two electrodes makes the thickness of electrostrictive layer 14 be become λ H from H,
So that the chamber length of organic electroluminescence device changes accordingly, and then make luminescent layer 13 institute
The light color sent changes, therefore, by regulation electrostrictive layer 14 place electric field
Field intensity, described organic electroluminescence device can be made to send different colors so that bag
The colour gamut of the display device including described organic electroluminescence device is wider, and display effect is more preferable.
Specifically, the material forming electrostrictive layer 14 includes electroactive polymer.Described electricity
Living polymer, under 100V/um field intensity, will produce electroluminescent blockage effect and produce deformation.
More specifically, described electroactive polymer can use electroluminescent contraction grafted elastomeric, electroluminescent receipts
Reducer coupling branch elastomer is mainly made up of elastic main chain and side chain, flexible main chain and the grafting of crystallization
Unit is synthesized by the polar monomer with electric charge, can produce dipole moment, and make crystallization side chain lure
Lead polarization.In the case of applying electric field, dipole, produces torque, stimulates crystallization side chain
Polarisation unit rotate, main chain local is reset, and causes distortional elastomer, and thickness changes.Due to
The adaptability to changes of described electroactive polymer is relatively strong, and therefore, the thickness of electrostrictive layer 14 becomes
Change sensitiveer, so that the color adaptation effect of organic electroluminescence device becomes apparent from.Certainly,
Described electroactive polymer can also use electroluminescent viscoelastic polymer, liquid crystal elastic body etc..
The electrostrictive layer 14 that electroactive polymer is formed can play the effect of transmission electronics,
Such that it is able to as the electron transfer layer in organic electroluminescence device, send out simplifying organic electroluminescence
The structure of optical device.Furthermore, it is contemplated that the electrostrictive layer 14 that electroactive polymer is formed leads to
Make frequently with spin-coating method, when the organic film being previously formed utilizes vapour deposition method to be formed, can be subject to
To the impact of electrostrictive layer 14 processing procedure, in order to prevent the generation of this situation, can be by electricity
Cause stretchable layer 14 and be formed at organic film that spin-coating method or ink-jet printing process can be used to make
Surface.For the electron injecting layer in organic electroluminescence device and luminescent layer 13, electronics is noted
Entering layer can use spin-coating method to be formed, and spin-on material can be zinc oxide precursor solution, therefore,
When electrostrictive layer 14 is as electron transfer layer, this electrostrictive layer 14 is formed at electronics and injects
The top of layer, i.e. uses and is inverted the illuminated structure in the end.
Specifically, as it is shown in figure 1, described organic electroluminescence device also includes being arranged on
Between one electrode 11 and the second electrode 12: electron injecting layer 15, hole injection layer 16 and
Hole transmission layer 17.Electron injecting layer 15, electrostrictive layer 14, luminescent layer 13, hole pass
Defeated layer 17, hole injection layer 16 are sequentially stacked along the direction away from substrate 10.That is, first
Electrode 11 as negative electrode to provide electronics, the second electrode 12 as anode to provide hole.?
In Fig. 1, electrostrictive layer 14 is used as electron transfer layer, the thickness of electrostrictive layer 14
Degree directly controlling by the electric field between the first electrode 11 and the second electrode 12, thus to light
While line color regulation, simplify the structure of organic electroluminescence device as far as possible.
Four class formations at organic electroluminescence device (that is, are inverted end luminescence, are inverted top
Luminous and the positive top set of light, positive bottom set is luminous) in, it is inverted the luminous and positive top set luminescence Organic Electricity in the end
The microcavity effect of electroluminescence device is more apparent, so that in this two classes organic electroluminescence device
The regulation effect of light color is also become apparent from by the thickness change of electrostrictive layer 14, therefore,
Organic electroluminescence device in Fig. 1 preferably employs inversion end ray structure, i.e. the first electrode
11 is semi-transparent semi-reflecting electrode, and the second electrode 12 is reflecting electrode.
So that the light color of described organic electroluminescence device and light luminance all can
Independent regulation, it is preferable that as in figure 2 it is shown, described organic electroluminescence device also includes arranging
The 3rd electrode 18 between luminescent layer 13 and electrostrictive layer 14, the 3rd electrode 18 is semi-transparent
Half antielectrode.When electrostrictive layer 14 between the first electrode 11 and the 3rd electrode 18,
When luminescent layer 13 is between the 3rd electrode 18 and the second electrode 12, can be by regulation the
Voltage between one electrode 11 and the 3rd electrode 18 carrys out light regulating color, by regulation the 3rd
Voltage-regulation light luminance between electrode 18 and the second electrode 12；When electrostrictive layer 14
Between the 3rd electrode 18 and the second electrode 12, luminescent layer 13 be positioned at the first electrode 11
And time between the 3rd electrode 18, can by regulation the 3rd electrode 18 and the second electrode 12 it
Between voltage carry out light regulating color, by regulating between the first electrode 11 and the 3rd electrode 18
Voltage-regulation light luminance so that organic electroluminescence device light color regulation and
Light luminance regulation is independent of each other, and then makes the Show Color of organic electroluminescence display device richer
Rich.Wherein, electrostrictive layer 14 can be arranged on the first electrode 11 or the 3rd electrode 18
Upper surface, to prevent from using the method such as spin-coating method, ink-jet printing process to form electrostrictive layer 14
Time, the organic film being previously formed is produced impact.
Further, as it is shown on figure 3, described organic electroluminescence device also includes being arranged on
Insulating barrier 20 on 3rd electrode 18 and the 4th electrode 21 being arranged on insulating barrier 20, electricity
Causing stretchable layer 14 to be arranged on the 4th electrode 21, the 4th electrode 21 is semi-transparent semi-reflecting electrode.
In the structure of Fig. 2, the 3rd electrode 18 regulates as light luminance regulation and light color
Common electrode, and in structure in figure 3, by the 4th electrode 21 and the second electrode 12
Between voltage-regulation light color, by the electricity between the first electrode 11 and the 3rd electrode 18
Pressure carrys out light regulating brightness, so that being completely independent between two kinds of regulation processes.Wherein, electroluminescent stretch
Contracting layer 14 can be formed directly into the surface of the 4th electrode 21.It should be noted that insulating barrier
The setting of 20 should not affect the outgoing of light.
In the case of being provided with the 3rd electrode 13, organic electroluminescence device can be to be inverted
Type structure or just putting type structure.
Shown in Fig. 2 is a kind of to arrange the 3rd electrode 13, be not provided with just putting of the 4th electrode 21
Type organic electroluminescence device, as in figure 2 it is shown, described organic electroluminescence device also includes setting
Put the electron injecting layer 15 between the first electrode 11 and the 3rd electrode 18, electron transfer layer
19, hole injection layer 16 and hole transmission layer 17.Wherein, hole injection layer 16, hole pass
Defeated layer 17, luminescent layer 13, electron transfer layer 19, electron injecting layer 15 are along away from substrate 10
Direction be sequentially stacked, i.e. the first electrode 11 as anode to provide hole, the 3rd electrode
13 as negative electrode to provide electronics.It is of course also possible to the electrostrictive layer 14 in Fig. 2 is set
Put between the first electrode 11 and the 3rd electrode 18, by hole injection layer 16, hole transport
Layer 17, luminescent layer 13, electron transfer layer 19, electron injecting layer 15 are successively set on the 3rd
Between electrode 18 and the second electrode 12, and electron injecting layer 15 is adjacent with the second electrode 12,
That is, the 3rd electrode 11 as anode to provide hole, the second electrode 12 as negative electrode with provide
Electronics.
Shown in Fig. 3 is to arrange the 3rd electrode 18 and the type of just putting of the 4th electrode 21 simultaneously
The structural representation of organic electroluminescence device, differing only in Fig. 3 of Fig. 3 Yu Fig. 2 is many
Being provided with the 4th electrode 21 and insulating barrier 20, electrostrictive layer 14 is positioned on the 4th electrode 21,
Other structures are all identical with the structure in Fig. 2, repeat no more here.
As described above, in just putting type organic electroluminescence device, push up the micro-of ray structure
Chamber effect is more apparent, therefore, imitates the regulation of light color to improve electrostrictive layer 14
Really, type of just the putting organic electroluminescence device in Fig. 2 and Fig. 3 preferably employs top ray structure,
That is, the first electrode 11 is reflecting electrode, and the second electrode 12 is semi-transparent semi-reflecting electrode.
Shown in Fig. 4 be a kind of be provided with the 3rd electrode 13, be not provided with the 4th electrode 21 fall
Putting type organic electroluminescence device, as shown in Figure 4, organic electroluminescence device also includes arranging
Electron injecting layer 15 between the first electrode 11 and the 3rd electrode 18, electron transfer layer 19,
Hole injection layer 16 and hole transmission layer 17.Wherein, electron injecting layer 15, electron transfer layer
19, luminescent layer 13, hole transmission layer 17 and hole injection layer 16 are along the side away from substrate 10
To being sequentially stacked.That is, the first electrode 11 makees negative electrode to provide electronics, and the 3rd electrode 13 makees sun
Pole is to provide hole.
Shown in Fig. 5 is a kind of to be provided with the 3rd electrode 13 and the inversion type of the 4th electrode 21
Organic electroluminescence device, differing only in of Fig. 5 Yu Fig. 4 is provided with the 4th electricity more in Fig. 5
Pole 21 and insulating barrier 20, electrostrictive layer 14 is positioned on the 4th electrode 21, and other structures are equal
Identical with the structure in Fig. 4, repeat no more here.
As described above, in inversion type organic electroluminescence device, the microcavity of end ray structure
Effect is more apparent, therefore, in order to improve the electrostrictive layer 14 regulating effect to light color,
Inversion type organic electroluminescence device in Fig. 4 and Fig. 5 preferably employs end ray structure, i.e.
First electrode 11 is semi-transparent semi-reflecting electrode, and the second electrode 12 is reflecting electrode.
In the present invention, the structure of semi-transparent semi-reflecting electrode include but not limited to magnesium ag alloy layer,
Lithium-aluminium alloy layer；The structure of reflecting electrode includes but not limited to aluminum metal layer, silver metal layer, oxygen
Change the one in indium tin layer or the composite bed of a few person.
As the second aspect of the invention, it is provided that the making of a kind of organic electroluminescence device
Method, comprises the following steps:
Substrate is provided.
The most square one-tenth the first electrode.
The most square one-tenth luminescent layer.
The most square one-tenth electrostrictive layer.
Form the second electrode, and make described luminescent layer and described electrostrictive layer be respectively positioned on institute
State between the first electrode and described second electrode；Wherein, in the first electrode and the second electrode
Person be reflecting electrode, another one be semi-transparent semi-reflecting electrode so that described first electrode and described
Forming optical microcavity between two electrodes, the thickness of described electrostrictive layer is with the field of its place electric field
Strong change and change.
Specifically, the step forming electrostrictive layer may include that spin coating electroactive polymer
Solution, to form layer of electroactive polymer.
Fig. 7 shows the first manufacture method flow chart of described organic electroluminescence device.
Shown in Fig. 7 and Fig. 1, manufacture method includes:
S10, offer substrate 10.
S11, the most square one-tenth the first electrode 11.
S12, on the first electrode 11 formed electron injecting layer 15, specifically include: spin coating oxygen
Change zinc precursor solution, to form electron injecting layer 15.
S13, on electron injecting layer 15 formed electrostrictive layer 14, specifically include: spin coating
Electroactive polymer solution, then dry, to form electrostrictive layer 14.
S14, on electrostrictive layer 14 formed luminescent layer 13, specifically can use vapour deposition method
Formed.
S15, on luminescent layer 13, sequentially form hole transmission layer 17 and hole injection layer 16,
Hole transmission layer 17 and hole injection layer 16 all can use vapour deposition method to be formed.
S16, form the second electrode 12.
By the making of S10～S16, inversion type organic electroluminescence in Fig. 1 can be obtained
Part, as described above, it is luminous that the inversion type organic electroluminescence device in Fig. 1 preferably employs the end
Structure, the first electrode 11 is semi-transparent semi-reflecting electrode, and the second electrode 12 is reflecting electrode.Accordingly
Ground, step S11 specifically may include that formation semi-transparent semi-reflective conductive film layer；To described half
Transparent semi-reflective conductive film layer is patterned technique, forms the figure including the first electrode.Step
S16 specifically may include that formation reflective conductive film layer.Wherein, conductive film layer uses evaporation
Method is formed.
Fig. 8 shows the second manufacture method flow chart of described organic electroluminescence device.
Shown in Fig. 8 and Fig. 2, described manufacture method includes:
S20, offer substrate 10.
S21, form the first electrode 11 over the substrate 10.
S22, sequentially form hole injection layer 16 and hole transmission layer 17.
S23, formation luminescent layer 13.
S24, sequentially form electron transfer layer 19 and electron injecting layer 15.
S25, formation the 3rd electrode 18, wherein, the 3rd electrode 18 is semi-transparent semi-reflecting electrode.
S26, formation electrostrictive layer 14.
S27, form the second electrode.
Wherein, hole injection layer 16, hole transmission layer 17, luminescent layer 13, electron injecting layer
15 and electron transfer layer 19 vapour deposition method all can be used to be formed.By above-mentioned S20～27, shape
Become and be just equipped with organic electroluminescence devices shown in Fig. 2, i.e. the first electrode 11 make anode with
Thering is provided hole, the 3rd electrode 18 makees negative electrode to provide electronics.Wherein, the first electrode 11 is permissible
For semi-transparent semi-reflecting electrode, it is also possible to for reflecting electrode, as it has been described above, luminous organic of positive top set
The microcavity effect of optical device is obvious, therefore, the first electrode 11 preferably reflecting electrode, second
Electrode 12 is preferably semi-transparent semi-reflecting electrode, thus forms positive top set ray structure, to improve electricity
Cause the stretchable layer 14 regulating effect to chamber length.That is, S21 specifically may include that formation reflection
Type conductive film layer；Described reflective conductive film layer is patterned technique, includes first to be formed
The figure of electrode 11；S27 specifically may include that formation semi-transparent semi-reflective conductive film layer.Its
In, conductive film layer uses vapour deposition method to be formed.
Compare with the first manufacture method, the organic electroluminescent that the second manufacture method is formed
In device, the thickness of electrostrictive layer 14 is by electricity between the second electrode 12 and the 3rd electrode 18
The control of pressure, the light luminance of luminescent layer 13 is by between the first electrode 11 and the 3rd electrode 18
The control of voltage, so that the color adaptation of organic electroluminescence device and brightness regulation are mutual
Independent, it is independent of each other.
The third of manufacture method giving described organic electroluminescence device in Fig. 9 is concrete
Flow chart.Shown in Fig. 9 and Fig. 3, described manufacture method includes:
S30, offer substrate 10.
S31, form the first electrode 11 over the substrate 10.
S32, sequentially form hole injection layer 16 and hole transmission layer 17.
S33, formation luminescent layer 13.
S34, sequentially form electron transfer layer 19 and electron injecting layer 15.
S35, formation the 3rd electrode 18, wherein, the 3rd electrode 18 is semi-transparent semi-reflecting electrode.
S36, sequentially forming insulating barrier 20 and the 4th electrode 21, wherein, the 4th electrode is half
Saturating half antielectrode.
S37, formation electrostrictive layer 14.
S38, form the second electrode 12.
It can be seen that compare with the second manufacture method, the third manufacture method to be made
Insulating barrier 20 and the step of the 4th electrode 21, remaining step is identical with the third manufacture method,
First electrode 11 preferably also reflecting electrode, the second electrode 12 is preferably semi-transparent semi-reflecting electrode.
By S30～S38, form the structure shown in Fig. 3.In this structure, electrostrictive layer
The thickness of 14 is by the Control of Voltage between the 4th electrode 21 and the second electrode 12, luminescent layer 13
Light luminance by the Control of Voltage between the first electrode 11 and the 3rd electrode 18, brightness regulation
And do not have common electrode between two processes of color adaptation, so that two regulation processes are more
Independent.
The 4th kind of the manufacture method giving described organic electroluminescence device in Figure 10 concrete
Flow chart.Shown in Figure 10 and Fig. 4, described manufacture method includes:
S40, offer substrate 10.
S41, form the first electrode 11 over the substrate 10.
S42, sequentially form electron injecting layer 15 and electron transfer layer 19.
S43, formation luminescent layer 13.
S44, sequentially form hole transmission layer 17 and hole injection layer 16.
S45, formation the 3rd electrode 18, wherein, the 3rd electrode 18 is semi-transparent semi-reflecting electrode.
S46, formation electrostrictive layer 14.
S47, form the second electrode 12.
Wherein, hole injection layer 16, hole transmission layer 17, luminescent layer 13, electron injecting layer
15 and electron transfer layer 19 vapour deposition method all can be used to be formed.By above-mentioned S40～47, shape
Become the inversion organic electroluminescence device shown in Fig. 4, i.e. the first electrode 11 make negative electrode with
Thering is provided electronics, the 3rd electrode 18 makees anode to provide hole.Wherein, the first electrode 11 is permissible
For semi-transparent semi-reflecting electrode, it is also possible to for reflecting electrode, as it has been described above, inversion type organic electroluminescence is sent out
In optical device, the microcavity effect of end ray structure is obvious, and therefore, the first electrode 11 is preferably
Semi-transparent semi-reflecting electrode, the second electrode 12 is preferably reflecting electrode, thus it is luminous to form the inversion end
Structure, to improve the electrostrictive layer 14 regulating effect to chamber length.That is, S41 is the most permissible
Including: form semi-transparent semi-reflective conductive film layer；Described semi-transparent semi-reflective conductive film layer is carried out structure
Figure technique, to form the figure including the first electrode 11；S47 specifically may include that formation
Reflective conductive film layer.Wherein, conductive film layer uses vapour deposition method to be formed.
The 5th kind of the manufacture method giving described organic electroluminescence device in Figure 11 concrete
Flow chart.Shown in Figure 11 and Fig. 5, described manufacture method includes:
S50, offer substrate 10.
S51, form the first electrode 11 over the substrate 10.
S52, sequentially form electron injecting layer 15 and electron transfer layer 19.
S53, formation luminescent layer 13.
S54, sequentially form hole transmission layer 17 and hole injection layer 16.
S55, formation the 3rd electrode 18, wherein, the 3rd electrode 18 is semi-transparent semi-reflecting electrode.
S56, sequentially form insulating barrier 20 and the 4th electrode 21.
S57, formation electrostrictive layer 14.
S58, form the second electrode 12.
Compare with the 4th kind of manufacture method, the 5th kind of manufacture method is many making insulating barrier 20 He
The step of the 4th electrode 21, remaining step is identical with the 4th kind of manufacture method, the first electrode 11
Preferably also semi-transparent semi-reflecting electrode, the second electrode 12 is preferably reflecting electrode.By S50～S58,
Form the structure shown in Fig. 5, so that brightness regulation and two processes of color adaptation are more
Independent.
In the manufacture method of the organic electroluminescence device of present invention offer, for making half
The semi-transparent semi-reflective conductive film layer of saturating half antielectrode includes but not limited to that magnesium ag alloy layer, lithium aluminum close
Layer gold；For make the reflective conductive film layer of reflecting electrode include but not limited to aluminum metal layer,
One in silver metal layer, indium tin oxide layer or the composite bed of a few person.
As the third aspect of the invention, it is provided that a kind of display device, including above-mentioned organic
Electroluminescent device.Owing to the glow color of described organic electroluminescence device can regulate, because of
This, the color of described display device display picture can also regulate accordingly, so that aobvious
The colour gamut of showing device is wider, and display effect is more preferable.
It is understood that the principle that is intended to be merely illustrative of the present of embodiment of above and
The illustrative embodiments used, but the invention is not limited in this.For in this area
For those of ordinary skill, without departing from the spirit and substance in the present invention, can do
Going out various modification and improvement, these modification and improvement are also considered as protection scope of the present invention.
Claims (12)
1. an organic electroluminescence device, including substrate, is arranged on first above substrate
Electrode, it is arranged on the luminescent layer above described first electrode, is arranged on above described luminescent layer
Second electrode, it is characterised in that the one in described first electrode and the second electrode is reflection electricity
Pole, another one is semi-transparent semi-reflecting electrode, so that between described first electrode and described second electrode
Forming optical microcavity, described organic electroluminescence device also includes being positioned at described first electrode and institute
State the electrostrictive layer between the second electrode.
Organic electroluminescence device the most according to claim 1, it is characterised in that shape
The material becoming described electrostrictive layer includes electroactive polymer.
Organic electroluminescence device the most according to claim 2, it is characterised in that institute
State organic electroluminescence device also include being arranged on described first electrode and described second electrode it
Between: electron injecting layer, hole injection layer and hole transmission layer；
Described electron injecting layer, described electrostrictive layer, described luminescent layer, described hole pass
Defeated layer, described hole injection layer are sequentially stacked along the direction away from described substrate.
Organic electroluminescence device the most according to claim 1, it is characterised in that institute
State organic electroluminescence device and also include being arranged between described luminescent layer and electrostrictive layer
Three electrodes, described 3rd electrode is semi-transparent semi-reflecting electrode.
Organic electroluminescence device the most according to claim 4, it is characterised in that institute
State organic electroluminescence device also to include being arranged on the insulating barrier on described 3rd electrode and setting
The 4th electrode on described insulating barrier, described electrostrictive layer is arranged on described 4th electrode
On, described 4th electrode is semi-transparent semi-reflecting electrode.
6. according to the organic electroluminescence device described in claim 4 or 5, it is characterised in that
Described organic electroluminescence device also includes being arranged on described first electrode and described 3rd electrode
Between: electron injecting layer, electron transfer layer, hole injection layer and hole transmission layer；
Described hole injection layer, described hole transmission layer, described luminescent layer, described electronics pass
Defeated layer and described electron injecting layer are sequentially stacked along the direction away from described substrate.
7. according to the organic electroluminescence device described in claim 4 or 5, it is characterised in that
Described organic electroluminescence device also includes being arranged on described first electrode and described 3rd electrode
Between electron injecting layer, electron transfer layer, hole injection layer and hole transmission layer；
Described electron injecting layer, described electron transfer layer, described luminescent layer, described hole pass
Defeated layer and described hole injection layer are sequentially stacked along the direction away from described substrate.
8. the manufacture method of an organic electroluminescence device, it is characterised in that include following
Step:
Substrate is provided；
The most square one-tenth the first electrode；
The most square one-tenth luminescent layer；
The most square one-tenth electrostrictive layer；
Form the second electrode, and make described luminescent layer and described electrostrictive layer be respectively positioned on institute
State between the first electrode and described second electrode；
Wherein, the one in described first electrode and described second electrode is reflecting electrode, another
One is semi-transparent semi-reflecting electrode, so that forming light between described first electrode and described second electrode
Learn microcavity.
Manufacture method the most according to claim 8, it is characterised in that form electroluminescent stretching
The step of contracting layer includes:
Spin coating electroactive polymer solution, to form layer of electroactive polymer.
Manufacture method the most according to claim 8, it is characterised in that form luminescence
Layer step and formed electrostrictive layer step between further comprising the steps of:
Form the 3rd electrode；Wherein, described 3rd electrode is semi-transparent semi-reflecting electrode.
11. manufacture methods according to claim 10, it is characterised in that form the 3rd
After the step of electrode, further comprising the steps of:
Sequentially forming insulating barrier and the 4th electrode, wherein, described 4th electrode is semi-transparent semi-reflecting
Electrode；
Formed electrostrictive layer step sequentially form insulating barrier and the 4th electrode step it
After carry out.
12. 1 kinds of display devices, it is characterised in that include in claim 1 to 7 any
One described organic electroluminescence device.
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| CN111987128A (en) * | 2020-08-26 | 2020-11-24 | 武汉天马微电子有限公司 | Display panel and display device |
| WO2022049612A1 (en) * | 2020-09-01 | 2022-03-10 | シャープ株式会社 | Light emitting element and display device |
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| CN105932171B (en) | 2018-03-23 |
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