CN104752617B - A kind of passive type organic electroluminescence device and preparation method thereof - Google Patents
A kind of passive type organic electroluminescence device and preparation method thereof Download PDFInfo
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Abstract
The invention provides a kind of passive type organic electroluminescence device and preparation method thereof, for solving the problem of display is uneven caused by resistance is bigger than normal in the prior art.The passive type organic electroluminescence device, including underlay substrate, at least one regularly arranged ray structure on underlay substrate, at least one described ray structure include：Anode positioned at the underlay substrate side；Positioned at organic function layer of the anode away from underlay substrate side；The cathode insulated column for setting and being connected with layer with the organic function layer, and the side of the cathode insulated column and the angle of anode are obtuse angle, the angle of opposite side and anode is acute angle；And, positioned at the negative electrode of the organic function layer and cathode insulated column away from underlay substrate side, the negative electrode covers the organic function layer and cathode insulated column.
Description
Technical field
The present invention relates to electroluminance display technical field, more particularly to a kind of passive type organic electroluminescence device and its
Preparation method.
Background technology
Organic electroluminescent diode apparatus (Organic Light Emitting Diode, OLED), can self-luminous, adopt
The display being made of OLED has color true to nature, ultra-thin, energy-conservation, the advantages of angular field of view is wide, is referred to as display skill of future generation
Art.
Organic electroluminescent diode apparatus is divided into active organic electroluminescent diode component (Active again
Matrix/Organic Light Emitting Diode, AMOLED) and passive type organic electroluminescent diode apparatus
Two kinds of (Passive Matrix/Organic Light Emitting Diode, PMOLED)；Wherein, PMOLED, which is shown, has
The low advantage of simple in construction, cost.Referring to Fig. 1, general, PMOLED mainly includes：What is prepared on underlay substrate 101 is transparent
Anode 102, positioned at the top of the anode 102, for isolate two adjacent negative electrodes in inverted trapezoidal insulated column 103,
Organic function layer 104 and the negative electrode 105 above the organic function layer.Because wire has edge after resistance, energization
The direction for conduction has certain pressure drop, therefore lower further away from the voltage of signal input part, and due to OLED brightness by
The size of electric current is formed on, therefore the size of resistance value influences the uniformity of display strongly；And it can not lead in PMOLED is shown
Cross image element circuit and carry out voltage compensation.
The content of the invention
It is existing for solving the embodiments of the invention provide a kind of passive type organic electroluminescence device and preparation method thereof
In technology the problem of the display caused by resistance is bigger than normal is uneven.
It is located at the embodiments of the invention provide a kind of passive type organic electroluminescence device, including substrate base on underlay substrate
At least one regularly arranged ray structure, at least one described ray structure includes：
Anode, positioned at the side of the underlay substrate；
Organic function layer, positioned at the side of the remote underlay substrate of the anode；
Cathode insulated column, is set with the organic function layer with layer, and side and the folder of anode of the cathode insulated column
Angle is obtuse angle and is connected with functional layer that the angle of opposite side and anode is acute angle；
Negative electrode, positioned at the organic function layer and cathode insulated column away from underlay substrate side, covers the organic functions
Layer and cathode insulated column.
Passive type organic electroluminescence device provided in an embodiment of the present invention, including at least one ray structure, wherein extremely
A rare ray structure includes anode, the organic function layer positioned at side of the anode away from underlay substrate and had with described
The cathode insulated column that machine functional layer is set with layer, and the side of the cathode insulated column and the angle of anode are obtuse angle and and work(
Ergosphere is connected, and the angle of opposite side and anode is acute angle so that negative electrode is only at an acute angle in the cathode insulated column and anode
Side disconnects, and the negative electrode adjacent to two realizes one-way isolation, organic function layer described in the negative electrode lid and the cathode isolation
Post, increases the area of negative electrode, reduces cathode resistor, reduces as the pressure drop caused by resistance, efficiently solves because resistance is inclined
The problem of display caused by big is uneven, improves user's impression.
Preferably, the acute angle is 40 °~70 °.When the angle of the acute angle is excessive, two adjacent the moon are may result in
Pole can not thoroughly keep apart, when the angle too small of the acute angle, then can cause the easy fragmentation of cathode insulated column, pollute box inner ring
Border, reduces the yield and performance of electroluminescent device；The acute angle can ensure that two adjacent negative electrodes exist within the range, both
Thoroughly disconnected at the acute angle, realize the completely isolated of the negative electrode adjacent to two, ensure the stability of cathode insulated column again.
Preferably, the height of the cathode insulated column is 1.5~2.5 μm.When the height of the cathode insulated column is relatively low,
It is difficult there is certain thickness two negative electrodes to disconnect adjacent；When the height of the cathode insulated column is higher, due to technique
Limitation, it is difficult to make higher insulated column, and easily chipping, the cathode insulated column of fragmentation also can be to organic functions layer material
And/or cathode material produce pollution so that organic function layer and negative electrode quality reduction, and then cause luminescent device yield and
Performance is reduced.
Preferably, the cathode insulated column is shaped as parallel four in the cross section on the negative electrode bearing of trend
Side shape.When the cathode insulated column is parallelogram in the cross section on the negative electrode bearing of trend, preparation technology
It is simple to operation, it is conducive to provide production efficiency.In addition, the cross section of the cathode insulated column can also be fan-shaped, obtuse angle three
The other shapes such as angular.
Preferably, the base of the parallelogram is 10~25 μm.In general technology, the cathode insulated column is being formed
Shi Caiyong negative photoresists, because negative photoresist has the shortcomings that distinguishing is low, poor adhesion, it is therefore desirable to by insulated column
Base is widened；When the base of the parallelogram is 10~25 μm, i.e., when the base of described cathode insulated column is 10~25 μm,
It can ensure that the cathode insulated column is difficult for drop-off, while also will not be because the base of the cathode insulated column is excessive and influences opening
Rate.
Preferably, the cathode insulated column uses organic insulation photosensitive material.Using having for inverted trapezoidal can be formed after photoetching
The organic insulation photosensitive material of trapezoid can be formed after machine insulation photosensitive material and photoetching, is advantageously formed in the embodiment of the present invention
Side and the angle of anode be that the angle of obtuse angle, opposite side and anode is acute angle cathode insulated column.
The embodiments of the invention provide a kind of method for preparing passive type organic electroluminescence device, methods described includes：
Underlay substrate is provided, being formed on the underlay substrate includes the figure of anode；
Being formed in the side of the substrate formation anode of the figure including anode includes the figure of cathode insulated column；
Being formed in the side of the substrate formation cathode insulated column of the figure including cathode insulated column includes organic functions
The figure of layer, the cathode insulated column is set with the organic function layer with layer, and side and the anode of the cathode insulated column
Angle be obtuse angle and be connected with organic function layer that the angle of opposite side and anode is acute angle；
Being formed in the side of the substrate formation functional layer of the figure including organic function layer includes the figure of negative electrode, institute
The figure for stating negative electrode is located at the surface of the functional layer and the cathode insulated column away from substrate.
By the method provided in an embodiment of the present invention for preparing passive type organic electroluminescence device, the passive type of preparation has
Organic electroluminescence devices include at least one ray structure, and wherein at least one ray structure includes anode, positioned at described
The organic function layer of side of the anode away from underlay substrate and the cathode insulated column set with the organic function layer with layer, and institute
State the side of cathode insulated column and the angle of anode be obtuse angle and is connected with functional layer, the angle of opposite side and anode is acute angle,
So that negative electrode only disconnects in the side at an acute angle with anode of the cathode insulated column, the negative electrode adjacent to two realize it is unidirectional every
From the negative electrode covers the organic function layer and the cathode insulated column, increases the area of negative electrode, reduces negative electrode electricity
Resistance, reduction is efficiently solved the problem of the display caused by resistance is bigger than normal is uneven as the pressure drop caused by resistance, is improved use
Experience at family.
Preferably, the acute angle is 40 °~70 °.When the angle of the acute angle is excessive, two adjacent the moon are may result in
Pole can not thoroughly keep apart, when the angle too small of the acute angle, then can cause the easy fragmentation of cathode insulated column, pollute box inner ring
Border；The acute angle can ensure that two adjacent negative electrodes thoroughly disconnect at the acute angle within the range, both, realize to two phases
Adjacent negative electrode it is completely isolated, ensure the stability of cathode insulated column again.
Preferably, the height of the cathode insulated column is 1.5~2.5 μm.When the height of the cathode insulated column is relatively low,
It is difficult there is certain thickness two negative electrodes to disconnect adjacent；When the height of the cathode insulated column is higher, due to technique
Limitation, it is difficult to make higher insulated column, and easily chipping, the cathode insulated column of fragmentation also can be to organic functions layer material
And/or cathode material produce pollution so that organic function layer and negative electrode quality reduction, and then cause display device yield and
Performance is reduced.
Preferably, the cathode insulated column is shaped as parallel four in the cross section on the negative electrode bearing of trend
Side shape.When the cathode insulated column is parallelogram in the cross section on the negative electrode bearing of trend, preparation technology
It is simple to operation, it is conducive to provide production efficiency.In addition, the cross section of the cathode insulated column can also be fan-shaped, obtuse angle three
The other shapes such as angular.
Preferably, the base of the parallelogram is 10~25 μm.In general technology, the cathode insulated column is being formed
Shi Caiyong negative photoresists, because negative photoresist has the shortcomings that distinguishing is low, poor adhesion, it is therefore desirable to by insulated column
Base is widened；When the base of the parallelogram is 10~25 μm, i.e., when the base of described cathode insulated column is 10~25 μm,
It can ensure that the cathode insulated column is difficult for drop-off, while also will not be because the base of the cathode insulated column is excessive and influences opening
Rate.
Preferably, methods described also includes：The cathode insulated column is prepared using organic insulation photosensitive material.Using photoetching
Can be formed afterwards inverted trapezoidal organic insulation photosensitive material and photoetching after can form the organic insulation photosensitive material of trapezoid, be conducive to
The side formed in this embodiment of the present invention and the angle of anode are that the angle of obtuse angle, opposite side and anode is acute angle cathode isolation
Post.
Preferably, being formed in the side of the substrate formation anode of the figure including anode includes the figure of cathode insulated column
Shape, is specifically included：
Negative photoresist is formed in the side of the substrate formation anode of the figure including anode, passes through exposure imaging work
Skill formation includes the figure for the insulated column that the cross section on the negative electrode bearing of trend is inverted trapezoidal；
Positive-tone photo is formed in the side of the substrate formation anode of the figure including section for the insulated column of inverted trapezoidal
Glue, includes the isolating for inverted trapezoidal with the cross section on the negative electrode bearing of trend by the formation of exposure imaging technique
The cross section on the negative electrode bearing of trend of post connection is trapezoid or the figure of the insulated column of triangle, the section
Insulated column and section for inverted trapezoidal are the insulated column composition cathode insulated column of trapezoid or triangle.
Completion is prepared after the technique of anode, forms negative in the side for the substrate formation anode for forming organic insulation photosensitive material
Property photoresist, by exposure technology Formation cross-section be inverted trapezoidal insulated column, then formed inverted trapezoidal insulated column substrate
The side for forming anode forms positive photoresist, the thickness of the positive photoresist of formation and the negative photoresist formed
Thickness it is identical, be trapezoid finally by the section that is connected with the insulated column that the section is inverted trapezoidal of exposure technology formation
Insulated column, the insulated column that the section is the insulated column of inverted trapezoidal and section is trapezoid constitutes cathode insulated column.The preparation work
Skill is simple to operation, is conducive to provide efficiency.Further, it is also possible to first form anode in the substrate of the figure including anode
Side formed positive photoresist, by exposure technology Formation cross-section be trapezoid insulated column, then formed trapezoid every
Side from the substrate formation anode of post forms negative photoresist, and the thickness of the negative photoresist of formation is described with formation
The thickness of positive photoresist is identical, the section being connected finally by exposure technology formation with the section for the insulated column of inverted trapezoidal
For the insulated column of inverted trapezoidal, the section being initially formed is that the insulated column that section of the trapezoid insulated column with being formed afterwards is inverted trapezoidal is common
Constitute cathode insulated column.
Brief description of the drawings
Fig. 1 is the cross-sectional view of PMOLED in the prior art；
Fig. 2 is the planar structure schematic diagram for the PMOLED that the embodiment of the present invention one is provided；
Fig. 3 is the cross-sectional view for the PMOLED that the embodiment of the present invention one is provided；
Fig. 4 is that the cross-section structure that the cross section of insulated column provided in an embodiment of the present invention is the PMOLED of obtuse triangle shows
It is intended to；
Fig. 5 is that the cross section of insulated column provided in an embodiment of the present invention is fan-shaped PMOLED cross-sectional view；
Fig. 6 is the cross-sectional view of organic function layer；
Fig. 7 is the method flow diagram for preparing passive type organic electroluminescence device that the embodiment of the present invention two is provided；
Fig. 8 prepares the cross-sectional view of the substrate for the figure for including anode for completion；
Fig. 9 is the cross-sectional view for completing to prepare the substrate for the figure for including the insulated column that section is inverted trapezoidal；
Figure 10 prepares the cross-sectional view of the substrate for the figure for including cathode insulated column for completion；
Figure 11 prepares the cross-sectional view of the substrate for the figure for including organic function layer for completion；
Figure 12 is the cross-sectional view for completing to prepare the substrate for the figure for including the insulated column that section is trapezoid；
Figure 13 is the cross-sectional view for completing to prepare the substrate of the figure for the insulated column that section is inverted trapezoidal.
Embodiment
It is existing for solving the embodiments of the invention provide a kind of passive type organic electroluminescence device and preparation method thereof
In technology the problem of the display caused by resistance is bigger than normal is uneven.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
The embodiment of the present invention one provides a kind of passive type organic electroluminescence device, referring to Fig. 2 and Fig. 3, described passive
Formula organic electroluminescence device includes at least one regularly arranged ray structure that substrate base is located on underlay substrate, wherein,
At least one described ray structure includes：Underlay substrate 101, the anode 102 positioned at the side of underlay substrate 101, positioned at described
The organic function layer 104 of side of the anode 102 away from underlay substrate, the negative electrode set with the organic function layer 104 with layer every
From post 301, i.e., described cathode insulated column 301 also is located at side of the anode away from underlay substrate 101, and the cathode isolation
The side of post 301 is obtuse angle with the angle of anode 102 and is connected with functional layer that the angle of opposite side and anode 102 is acute angle；Position
Negative electrode 105 in the organic function layer 104 and the top of cathode insulated column 301, the negative electrode 105 covers the organic function layer
104 and cathode insulated column 301, and the negative electrode 105 is extends laterally, the multiple negative electrode genesis analysis.
The passive type organic electroluminescence device that the embodiment of the present invention one is provided, including at least one ray structure, wherein
At least one ray structure include anode, the organic function layer positioned at side of the anode away from underlay substrate and with it is described
The cathode insulated column that organic function layer is set with layer, and the side of the cathode insulated column and the angle of anode be obtuse angle and with
Functional layer is connected, and the angle of opposite side and anode is acute angle so that negative electrode is only at an acute angle in the cathode insulated column and anode
Side disconnect, the negative electrode adjacent to two realize one-way isolation, organic function layer described in the negative electrode lid and the negative electrode every
From post, the area of negative electrode is increased, cathode resistor is reduced, reduces as the pressure drop caused by resistance, efficiently solves because of resistance
The problem of display caused by bigger than normal is uneven, improves user's impression.
Further, the underlay substrate 101 is the transparency carriers such as glass substrate, quartz base plate or plastic base.It is described
Anode 102 is using tin indium oxide (Indium Tin Oxide, ITO), indium zinc oxide (Indium Zink Oxide, IZO), aluminium
Doping zinc-oxide, the tin oxide for the fluorine that adulterates or other transparent conductive metal oxides.
Further, the angle of the side of the cathode insulated column 301 and 102 acute angles of anode for 40 °~
70°.If the angle of the acute angle is excessive, when preparing negative electrode, cathode material may be sticked on the side of cathode insulated column, can be led
Two adjacent negative electrodes are caused thoroughly to keep apart；If the angle too small of the acute angle, the easy fragmentation of cathode insulated column can be caused,
Environment in box is polluted, the yield and performance of electroluminescent device is reduced；The acute angle can ensure adjacent within the range, both
Two negative electrodes thoroughly disconnect at the acute angle, realize the completely isolated of the negative electrode adjacent to two, ensure cathode insulated column again
Stability.
Further, the height of the cathode insulated column 301 is 1.5~2.5 μm.When the height of the cathode insulated column 301
When spending relatively low, it is difficult there is certain thickness two negative electrodes to disconnect adjacent；When the height of the cathode insulated column 301 is higher
When, due to the limitation of technique, it is difficult to make higher insulated column, and it is easily chipping, and the cathode insulated column of fragmentation also can be to having
Machine functional layer material and/or cathode material produce pollution so that the quality reduction of organic function layer and negative electrode, and then cause luminous
Yield and the performance reduction of device.
Further, the cathode insulated column 301 being shaped as in the cross section on the negative electrode bearing of trend
Parallelogram.When the cathode insulated column 301 is parallelogram in the cross section on the negative electrode bearing of trend,
Preparation technology is simple to operation, is conducive to provide production efficiency.In addition, the cross section of the cathode insulated column can also be fan
The other shapes such as shape, obtuse triangle, such as Fig. 4 and Fig. 5.
Further, the base of the parallelogram is 10~25 μm.In general technology, the cathode isolation is being formed
Negative photoresist is used during post, because negative photoresist has the shortcomings that distinguishing is low, poor adhesion, it is therefore desirable to by insulated column
Base widen；When the base of the parallelogram is 10~25 μm, i.e., the base of described cathode insulated column is 10~25 μm
When, it is ensured that the cathode insulated column is difficult for drop-off, while also will not be because the base of the cathode insulated column is excessive and influences
Aperture opening ratio.
Further, the cathode insulated column 301 uses organic insulation photosensitive material.Using can be formed down after illumination curing
The organic insulation photosensitive material of trapezoid can be formed after trapezoidal organic insulation photosensitive material and illumination dissolving, this is advantageously formed
The angle of side and anode in inventive embodiments is that the angle of obtuse angle, opposite side and anode is acute angle cathode insulated column.
Further, referring to Fig. 6, the organic function layer 104 includes：The luminescent layer 601 of the top of anode 102 is arranged on,
The anode 102 and negative electrode 105 are supplied to driving voltage to the luminescent layer 601 so that the ray structure lights.
In addition, the organic function layer 104 can also include：
Electron transfer layer 602, between the luminescent layer 601 and negative electrode 105, for electronics to be imported into luminescent layer
601。
Hole transmission layer 603, between the luminescent layer 601 and anode 102, for hole to be imported into luminescent layer
601。
Hole blocking layer 604, it is located between the electron transfer layer 602 and the luminescent layer 601, for stopping hole
It is transferred to the negative electrode 105；
Electronic barrier layer 605, it is located between the hole transmission layer 603 and the luminescent layer 601, for stopping electronics
It is transferred to the anode 102.
For example, when the luminescent layer 601 includes：Orange phosphor layer 601a positioned at the top of hole blocking layer 604, position
Blue fluorescent body 601b above orange phosphor layer 601a, and the green above the blue fluorescent body 601b
Phosphorescent layer 601c.During the organic function layer work, electronics is injected from the negative electrode 105, hole is injected from the anode 102,
Electronics is imported into luminescent layer 601 by the electron transfer layer 602, and hole imported into hair by the hole transmission layer 603
In photosphere 601, electronics and hole are combined in the luminescent layer 601, form singlet excitons and triplet exciton, the substance
State exciton and triplet exciton are from excitation state to during ground state transition, and its energy is discharged in the way of photon and heat energy, its
In, partial photonic is used as backlight, to realize that the display of image provides light；Specifically, in blue fluorescent body 601b, it is single
The exciton of weight state is from excitation state to the fluorescence for during ground state transition, sending blueness, in orange phosphor layer 601a and green phosphorescent layer
In 601c, the exciton of triplet from ground state to during excitation state transition, sending green phosphorescent and orange phosphor, the blue-fluorescence with
Green phosphorescent, orange phosphor are combined, and form white light, to realize that display provides light source.
The passive type organic electroluminescence device that the embodiment of the present invention one is provided, including at least one ray structure, wherein
At least one ray structure include anode, the organic function layer positioned at side of the anode away from underlay substrate and with it is described
The cathode insulated column that organic function layer is set with layer, and the side of the cathode insulated column and the angle of anode be obtuse angle and with
Organic function layer is connected, and the angle of opposite side and anode is acute angle so that negative electrode is in only in the cathode insulated column and anode
The side of acute angle disconnects, and the negative electrode adjacent to two realizes one-way isolation, the negative electrode cover the organic function layer with it is described
Cathode insulated column, increases the area of negative electrode, reduces cathode resistor, reduces as the pressure drop caused by resistance, efficiently solves
The problem of the display caused by resistance is bigger than normal is uneven, user's impression is improved.
The embodiment of the present invention two provides a kind of method for preparing passive type organic electroluminescence device, described referring to Fig. 7
Method includes：
Step 71 is there is provided underlay substrate, and being formed in the side of underlay substrate includes the figure of anode；
Step 72, being formed in the side of the substrate formation anode of the figure including anode includes the figure of cathode insulated column
Shape；
Step 73, formed and included in the side of the substrate formation cathode insulated column of the figure including cathode insulated column
The figure of machine functional layer；The cathode insulated column is set to be set with the organic function layer with layer, and the one of the cathode insulated column
The angle of side and anode is obtuse angle and is connected with organic function layer that the angle of opposite side and anode is acute angle；
Step 74, being formed in the side of the substrate formation functional layer of the figure including organic function layer includes negative electrode
Figure, the negative electrode covers the organic function layer and the cathode insulated column.
Further, the angle for being in the side of the cathode insulated column 301 and the anode 102 is 40 °~70 °.
When the angle of the acute angle is excessive, may result in two adjacent negative electrodes can not thoroughly keep apart, when the angle mistake of the acute angle
Hour, then it can cause environment in the easy fragmentation of cathode insulated column, pollution box；The acute angle within the range, can both ensure phase
Two adjacent negative electrodes thoroughly disconnect at the acute angle, realize the completely isolated of the negative electrode adjacent to two, ensure cathode isolation again
The stability of post.
Further, the height of the cathode insulated column 301 is 1.5~2.5 μm.When the cathode insulated column height compared with
When low, it is difficult there is certain thickness two negative electrodes to disconnect adjacent；When the height of the cathode insulated column is higher, due to
The limitation of technique, it is difficult to make, and it is easily chipping, and the cathode insulated column of fragmentation also can be to organic functions layer material and/or the moon
Pole material produces pollution so that the quality reduction of organic function layer and negative electrode, and then causes the yield and performance drop of display device
It is low.
Further, the cathode insulated column is parallel four side in the cross section on the negative electrode bearing of trend
Shape.When the cathode insulated column is parallelogram in the cross section on the negative electrode bearing of trend, preparation technology letter
It is single easy to operate, it is conducive to provide production efficiency.In addition, the cross section of the cathode insulated column can also be fan-shaped, obtuse angle triangle
The other shapes such as shape.
Further, the base of the parallelogram is 10~25 μm.In general technology, the cathode isolation is being formed
Negative photoresist is used during post, because negative photoresist has the shortcomings that distinguishing is low, poor adhesion, it is therefore desirable to by insulated column
Base widen；When the base of the parallelogram is 10~25 μm, i.e., the base of described cathode insulated column is 10~25 μm
When, it is ensured that the cathode insulated column is difficult for drop-off, while also will not be because the base of the cathode insulated column is excessive and influences
Aperture opening ratio.
Further, methods described also includes：The cathode insulated column is prepared using organic insulation photosensitive material.
The cathode insulated column 301 uses organic insulation photosensitive material.Using having for inverted trapezoidal can be formed after illumination curing
The organic insulation photosensitive material of trapezoid can be formed after machine insulation photosensitive material and illumination dissolving, implementation of the present invention is advantageously formed
The angle of side and anode in example is that the angle of obtuse angle, opposite side and anode is acute angle cathode insulated column.
Further, being formed in the side of the substrate formation anode of the figure including anode includes cathode insulated column
Figure, is specifically included：
Negative photoresist is formed in the side of the substrate formation anode of the figure including anode, passes through exposure imaging work
Skill formation includes the insulated column that the cross section on the negative electrode bearing of trend is inverted trapezoidal；
Positive-tone photo is formed in the side of the substrate formation anode of the figure including section for the insulated column of inverted trapezoidal
Glue, includes the isolating for inverted trapezoidal with the cross section on the negative electrode bearing of trend by the formation of exposure imaging technique
The cross section on the negative electrode bearing of trend of post connection is trapezoid or the figure of the insulated column of triangle, the section
Insulated column and section for inverted trapezoidal are the insulated column composition cathode insulated column of trapezoid or triangle.
Completion is prepared after the technique of anode, forms negative in the side for the substrate formation anode for forming organic insulation photosensitive material
Property photoresist, by exposure imaging technique be illumination curing technique Formation cross-section be inverted trapezoidal insulated column, then formed fall
The side of the substrate formation anode of trapezoidal insulated column forms positive photoresist, the thickness and shape of the positive photoresist of formation
Into the negative photoresist thickness it is identical, finally by exposure technology be illumination dissolution process formation with the section for fall
The section of trapezoidal insulated column connection is the insulated column of trapezoid, and the section is the insulated column of inverted trapezoidal and section is trapezoid
Insulated column constitute cathode insulated column.The preparation technology is simple to operation, is conducive to provide efficiency.Further, it is also possible to first in institute
State the figure including anode substrate formation anode side formed positive photoresist, by exposure imaging technique formation perpendicular to
Cross section is the insulated column of trapezoid on the negative electrode bearing of trend, then forms sun in the substrate for the insulated column for forming trapezoid
The side of pole forms negative photoresist, the thickness of the negative photoresist of formation and the thickness of the positive photoresist formed
It is identical, finally by exposure technology formation and insulated column of the cross section on the negative electrode bearing of trend for inverted trapezoidal
The cross section on the negative electrode bearing of trend of connection is the insulated column of inverted trapezoidal, and the section being initially formed isolates for trapezoid
Post and the section formed afterwards collectively form cathode insulated column for the insulated column of inverted trapezoidal.
The embodiment of the present invention three provides a kind of method for preparing passive type organic electroluminescence device, methods described bag
Include：
The first step, referring to Fig. 8, indium oxide layer tin electrically conducting transparent is deposited on underlay substrate 101 using magnetron sputtering method
Film, and by patterning processes, formation includes the figure of anode 102.
Second step, referring to Fig. 9, forms one layer of negative photo glue material on the substrate of the figure including anode 102, passes through
Formation cross-section is the insulated column 301a of inverted trapezoidal after illumination curing.
3rd step, referring to Figure 10, in Formation cross-section to form one layer of positive photoresist on the substrate of the insulated column of inverted trapezoidal,
After being dissolved by illumination Formation cross-section be trapezoid insulated column 301b, the section for inverted trapezoidal insulated column 301a with it is described
Section is that the insulated column 301b of trapezoid constitutes the cathode insulated column 301 that section is parallelogram.In general technology, preferably make
Pacify intelligence CTP-100 materials and the beautiful DL-100 materials in positive-tone photo northern Shandong with negative photoresist.
4th step, referring to Figure 11, on substrate prepared by cathode insulated column is completed, is included organic by patterning processes formation
The figure of functional layer 104.
5th step, referring to Fig. 3, on the substrate of the figure including organic function layer 104, is included by patterning processes formation
The pattern of negative electrode 105, the negative electrode is typically using the low workfunction metal materials such as magnesium, aluminium or itself and silver, copper, golden alloy material
Material.
In addition, being formed on substrate prepared by anode is completed includes the figure of cathode insulated column, it can also specifically include：
The first step, referring to Figure 12, forms positive photoresist on substrate prepared by anode is completed, passes through illumination curing technique
Being formed includes the figure for the insulated column 301b that section is trapezoid.
Second step, referring to Figure 13, negativity is formed on the substrate including section for the insulated column 301b of trapezoid figure
Photoresist, the thickness of the positive photoresist of the thickness of the negative photoresist of formation with being formed is identical, finally by light
The section being connected according to dissolution process formation with the insulated column that the section is trapezoid is the insulated column 301a of inverted trapezoidal, is initially formed
Section be trapezoid insulated column and insulated column that the section that is formed afterwards is inverted trapezoidal collectively forms cathode insulated column.
The method for preparing passive type organic electroluminescence device that the embodiment of the present invention two and three is provided, the passive type of preparation
Organic electroluminescence device includes at least one ray structure, and wherein at least one ray structure includes anode, positioned at described
The organic function layer of side of the anode away from underlay substrate and the cathode insulated column set with the organic function layer with layer, and institute
State the side of cathode insulated column and the angle of anode be obtuse angle and is connected with functional layer, the angle of opposite side and anode is acute angle,
So that negative electrode only disconnects in the side at an acute angle with anode of the cathode insulated column, the negative electrode adjacent to two realize it is unidirectional every
From the negative electrode covers the organic function layer and the cathode insulated column, increases the area of negative electrode, reduces negative electrode electricity
Resistance, reduction is efficiently solved the problem of the display caused by resistance is bigger than normal is uneven as the pressure drop caused by resistance, is improved use
Experience at family.
To sum up, electroluminescent device provided in an embodiment of the present invention includes at least one ray structure, and wherein at least has one
Individual ray structure include anode, the organic function layer positioned at side of the anode away from underlay substrate and with the organic functions
Layer with layer set cathode insulated column, and the side of the cathode insulated column and the angle of anode be obtuse angle and with functional layer connect
Connect, the angle of opposite side and anode is acute angle so that negative electrode only breaks in the side at an acute angle with anode of the cathode insulated column
Open, the negative electrode adjacent to two realizes one-way isolation, the negative electrode covers the organic function layer and the cathode insulated column, increases
The big area of negative electrode, reduces cathode resistor, reduces as the pressure drop caused by resistance, efficiently solve and led because resistance is bigger than normal
The problem of display of cause is uneven, improves image displaying quality.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (11)
1. a kind of passive type organic electroluminescence device, including underlay substrate, on underlay substrate it is regularly arranged at least
One ray structure, it is characterised in that at least one described ray structure includes：
Anode, positioned at the side of the underlay substrate；
Organic function layer, positioned at side of the anode away from underlay substrate；
Cathode insulated column, is set with the organic function layer with layer, and the side of the cathode insulated column and the angle of anode are
Obtuse angle is simultaneously connected with organic function layer, and the angle of opposite side and anode is acute angle, and the acute angle is 40 °~70 °；
Negative electrode, positioned at the organic function layer and cathode insulated column away from underlay substrate side, cover the organic function layer and
Cathode insulated column；And two adjacent negative electrodes are one-way isolation.
2. passive type organic electroluminescence device as claimed in claim 1, it is characterised in that the height of the cathode insulated column
For 1.5~2.5 μm.
3. passive type organic electroluminescence device as claimed in claim 1, it is characterised in that the cathode insulated column is vertical
Parallelogram is shaped as in the cross section on the negative electrode bearing of trend.
4. passive type organic electroluminescence device as claimed in claim 3, it is characterised in that the base of the parallelogram
For 10~25 μm.
5. passive type organic electroluminescence device as claimed in claim 1, it is characterised in that the cathode insulated column, which is used, to be had
Machine insulation photosensitive material.
6. a kind of method for preparing passive type organic electroluminescence device, it is characterised in that methods described includes：
Underlay substrate is provided, being formed in the side of the underlay substrate includes the figure of anode；
Being formed in the side of the substrate formation anode of the figure including anode includes the figure of cathode insulated column；
Being formed in the side of the substrate formation cathode insulated column of the figure including cathode insulated column includes organic function layer
Figure, the cathode insulated column is set with the organic function layer with layer, and side and the folder of anode of the cathode insulated column
Angle is obtuse angle and is connected with organic function layer that the angle of opposite side and anode is acute angle, and the acute angle is 40 °~70 °；
Being formed in the side of the substrate formation organic function layer of the figure including organic function layer includes the figure of negative electrode, institute
State negative electrode and cover the organic function layer and the cathode insulated column, and two adjacent negative electrodes are one-way isolation.
7. method as claimed in claim 6, it is characterised in that the height of the cathode insulated column is 1.5~2.5 μm.
8. method as claimed in claim 6, it is characterised in that the cathode insulated column is perpendicular to the negative electrode bearing of trend
On cross section be shaped as parallelogram.
9. method as claimed in claim 8, it is characterised in that the base of the parallelogram is 10~25 μm.
10. method as claimed in claim 6, it is characterised in that methods described also includes：Using organic insulation photosensitive material system
The standby cathode insulated column.
11. method as claimed in claim 10, it is characterised in that form anode in the substrate of the figure including anode
Side, which is formed, includes the figure of cathode insulated column, specifically includes：
Negative photoresist is formed in the side of the substrate formation anode of the figure including anode, passes through exposure imaging technique shape
Into including on the negative electrode bearing of trend cross section for inverted trapezoidal insulated column figure；
Positive photoresist is formed in the side of the substrate formation anode of the figure including section for the insulated column of inverted trapezoidal, is led to
The formation of overexposure photo development processes includes for the insulated column of inverted trapezoidal connecting with the cross section on the negative electrode bearing of trend
The cross section on the negative electrode bearing of trend connect is the figure of the insulated column of trapezoid or triangle, and the section is
Trapezoidal insulated column and the insulated column composition cathode insulated column that section is trapezoid or triangle.
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| CN110034247B (en) * | 2019-04-02 | 2021-03-16 | 深圳市华星光电半导体显示技术有限公司 | Preparation method of cathode isolation column |
| CN111430564B (en) | 2020-03-19 | 2022-06-03 | 武汉天马微电子有限公司 | Display panel and display device |
| CN112331703B (en) * | 2020-09-24 | 2022-09-16 | 武汉天马微电子有限公司 | Display panel and display device |
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| KR101331232B1 (en) * | 2009-07-06 | 2013-11-18 | 파이오니아 가부시키가이샤 | Display device and method for manufacturing the same |
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| WO2012114648A1 (en) * | 2011-02-23 | 2012-08-30 | パナソニック株式会社 | Organic electroluminescence display panel and organic electroluminescence display device |
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