CN104752617A - Passive organic electroluminescent device and manufacturing method thereof - Google Patents
Passive organic electroluminescent device and manufacturing method thereof Download PDFInfo
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Abstract
The invention provides a passive organic electroluminescent device and a manufacturing method thereof and aims to solve the problem of displaying nonuniformity caused by large resistance in the prior art. The passive organic electroluminescent device comprises a substrate baseplate and at least one light emitting structure, the light emitting structure which are arranged regularly are positioned on the substrate baseplate, each light emitting structure comprises an anode, an organic function layer, a cathode isolating column and an anode, each anode is positioned on one side of the corresponding substrate baseplate, each organic function layer is positioned on one side, away from the corresponding substrate baseplate, of the corresponding anode, each cathode isolating column and the corresponding organic function layer are arranged on a same layer and connected, an included angle between one side of each cathode isolating column and the corresponding anode is an obtuse angle, an included angle between the other side of each cathode isolating column and the corresponding anode is an acute angle, and each cathode is positioned on one sides, away from the corresponding substrate baseplate, of the corresponding organic function layer and the corresponding cathode isolating column and covers the corresponding organic function layer and the corresponding cathode isolating column.
Description
Technical field
The present invention relates to electroluminance display technical field, particularly relate to a kind of passive type organic electroluminescence device and preparation method thereof.
Background technology
Organic electroluminescent diode apparatus (Organic Light Emitting Diode, OLED), can self-luminous, and the displaying appliance colored adopting OLED to make is true to nature, ultra-thin, energy-conservation, and the advantages such as angular field of view is wide, are called as Display Technique of future generation.
Organic electroluminescent diode apparatus is divided into again active organic electroluminescent diode component (ActiveMatrix/Organic Light Emitting Diode, and passive type organic electroluminescent diode apparatus (Passive Matrix/Organic Light Emitting Diode, PMOLED) two kinds AMOLED); Wherein, PMOLED display has the advantage that structure is simple, cost is low.See Fig. 1, general, PMOLED mainly comprises: the transparent anode 102 of preparation on underlay substrate 101, be positioned at above described anode 102, for the negative electrode 105 of isolating the insulated column 103 in inverted trapezoidal of two adjacent negative electrodes, organic function layer 104 and be positioned at above described organic function layer.Because wire has resistance, have certain pressure drop along the direction of conduction after energising, the voltage therefore more away from signal input part is lower, and is limited by the size of electric current due to the brightness of OLED, and therefore the size of resistance value affects the uniformity of display strongly; And voltage compensation cannot be carried out by image element circuit in PMOLED display.
Summary of the invention
Embodiments provide a kind of passive type organic electroluminescence device and preparation method thereof, for solving problem uneven by the display that resistance is bigger than normal caused in prior art.
Embodiments provide a kind of passive type organic electroluminescence device, comprise substrate-based and be positioned at least one regularly arranged ray structure on underlay substrate, have at least a described ray structure to comprise:
Anode, is positioned at the side of described underlay substrate;
Organic function layer, is positioned at the side away from underlay substrate of described anode;
Cathode insulated column, is arranged with layer with described organic function layer, and the side of described cathode insulated column is obtuse angle with the angle of anode and is connected with functional layer, and the angle of opposite side and anode is acute angle;
Negative electrode, is positioned at described organic function layer and cathode insulated column away from underlay substrate side, covers described organic function layer and cathode insulated column.
The passive type organic electroluminescence device that the embodiment of the present invention provides, comprise at least one ray structure, a ray structure is wherein had at least to comprise anode, be positioned at described anode away from the organic function layer of the side of underlay substrate and the cathode insulated column that arranges with layer with described organic function layer, and the side of described cathode insulated column is obtuse angle with the angle of anode and is connected with functional layer, the angle of opposite side and anode is acute angle, negative electrode is made to be acute angle with anode side disconnects only at described cathode insulated column, unidirectional isolation is realized to two adjacent negative electrodes, organic function layer and described cathode insulated column described in described negative electrode lid, increase the area of negative electrode, reduce cathode resistor, reduce the pressure drop caused by resistance, efficiently solve the problem because of bigger than normal the caused display inequality of resistance, improve user's impression.
Preferably, described acute angle is 40 ° ~ 70 °.When the angle of this acute angle is excessive, two adjacent negative electrodes may be caused thoroughly not keep apart, when the angle too small of this acute angle, then cathode insulated column can be caused easily cracked, pollute box environment, reduce yield and the performance of electroluminescent device; Described acute angle, within the scope of this, both can ensure that two adjacent negative electrodes thoroughly disconnected at this acute angle place, and what realize two adjacent negative electrodes is completely isolated, ensures again the stability of cathode insulated column.
Preferably, the height of described cathode insulated column is 1.5 ~ 2.5 μm.When the height of described cathode insulated column is lower, not easily adjacent certain thickness two negative electrodes that have are disconnected; When the height of described cathode insulated column is higher, due to the restriction of technique, be difficult to make higher insulated column, and it is easily chipping, cracked cathode insulated column also can produce organic functions layer material and/or cathode material and pollute, the quality of organic function layer and negative electrode is reduced, and then the yield of luminescent device and performance are reduced.
Preferably, described cathode insulated column is parallelogram in the shape perpendicular to the cross section on described negative electrode bearing of trend.Described cathode insulated column is when being parallelogram perpendicular to the cross section on described negative electrode bearing of trend, and preparation technology is simple to operation, is conducive to provide production efficiency.In addition, the cross section of described cathode insulated column can also be other shapes such as fan-shaped, obtuse triangle.
Preferably, the base of described parallelogram is 10 ~ 25 μm.In general technology, adopt negative photoresist when forming described cathode insulated column, because negative photoresist has, distinguishing is low, the shortcoming of poor adhesion, therefore needs the base of insulated column to widen; When the base of described parallelogram is 10 ~ 25 μm, when namely the base of described cathode insulated column is 10 ~ 25 μm, described cathode insulated column difficult drop-off can be ensured, also can not affect aperture opening ratio because the base of described cathode insulated column is excessive simultaneously.
Preferably, described cathode insulated column adopts organic insulation photosensitive material.Can form the organic insulation photosensitive material of trapezoid after adopting the organic insulation photosensitive material and photoetching that can form inverted trapezoidal after photoetching, the angle being conducive to being formed side in the embodiment of the present invention and anode is the angle of obtuse angle, opposite side and anode is acute angle cathode insulated column.
Embodiments provide a kind of method preparing passive type organic electroluminescence device, described method comprises:
Underlay substrate is provided, described underlay substrate is formed the figure comprising anode;
The side forming anode at the described substrate comprising the figure of anode forms the figure comprising cathode insulated column;
The side forming cathode insulated column at the described substrate comprising the figure of cathode insulated column forms the figure comprising organic function layer, described cathode insulated column and described organic function layer are arranged with layer, and the side of described cathode insulated column is obtuse angle with the angle of anode and is connected with organic function layer, the angle of opposite side and anode is acute angle;
The side forming functional layer at the described substrate comprising the figure of organic function layer forms the figure comprising negative electrode, and the figure of described negative electrode is positioned at described functional layer and the described cathode insulated column surface away from substrate.
By the method preparing passive type organic electroluminescence device that the embodiment of the present invention provides, the passive type organic electroluminescence device of preparation comprises and has a ray structure at least, a ray structure is wherein had at least to comprise anode, be positioned at described anode away from the organic function layer of the side of underlay substrate and the cathode insulated column that arranges with layer with described organic function layer, and the side of described cathode insulated column is obtuse angle with the angle of anode and is connected with functional layer, the angle of opposite side and anode is acute angle, negative electrode is made to be acute angle with anode side disconnects only at described cathode insulated column, unidirectional isolation is realized to two adjacent negative electrodes, described negative electrode covers described organic function layer and described cathode insulated column, increase the area of negative electrode, reduce cathode resistor, reduce the pressure drop caused by resistance, efficiently solve the problem because of bigger than normal the caused display inequality of resistance, improve user's impression.
Preferably, described acute angle is 40 ° ~ 70 °.When the angle of this acute angle is excessive, two adjacent negative electrodes may be caused thoroughly not keep apart, when the angle too small of this acute angle, then cathode insulated column can be caused easily cracked, pollute box environment; Described acute angle, within the scope of this, both can ensure that two adjacent negative electrodes thoroughly disconnected at this acute angle place, and what realize two adjacent negative electrodes is completely isolated, ensures again the stability of cathode insulated column.
Preferably, the height of described cathode insulated column is 1.5 ~ 2.5 μm.When the height of described cathode insulated column is lower, not easily adjacent certain thickness two negative electrodes that have are disconnected; When the height of described cathode insulated column is higher, due to the restriction of technique, be difficult to make higher insulated column, and it is easily chipping, cracked cathode insulated column also can produce organic functions layer material and/or cathode material and pollute, the quality of organic function layer and negative electrode is reduced, and then the yield of display device and performance are reduced.
Preferably, described cathode insulated column is parallelogram in the shape perpendicular to the cross section on described negative electrode bearing of trend.Described cathode insulated column is when being parallelogram perpendicular to the cross section on described negative electrode bearing of trend, and preparation technology is simple to operation, is conducive to provide production efficiency.In addition, the cross section of described cathode insulated column can also be other shapes such as fan-shaped, obtuse triangle.
Preferably, the base of described parallelogram is 10 ~ 25 μm.In general technology, adopt negative photoresist when forming described cathode insulated column, because negative photoresist has, distinguishing is low, the shortcoming of poor adhesion, therefore needs the base of insulated column to widen; When the base of described parallelogram is 10 ~ 25 μm, when namely the base of described cathode insulated column is 10 ~ 25 μm, described cathode insulated column difficult drop-off can be ensured, also can not affect aperture opening ratio because the base of described cathode insulated column is excessive simultaneously.
Preferably, described method also comprises: adopt organic insulation photosensitive material to prepare described cathode insulated column.Can form the organic insulation photosensitive material of trapezoid after adopting the organic insulation photosensitive material and photoetching that can form inverted trapezoidal after photoetching, the angle being conducive to being formed side in this embodiment of the present invention and anode is the angle of obtuse angle, opposite side and anode is acute angle cathode insulated column.
Preferably, the side forming anode at the described substrate comprising the figure of anode forms the figure comprising cathode insulated column, specifically comprises:
The side forming anode at the described substrate comprising the figure of anode forms negative photoresist, is formed that to comprise perpendicular to described negative electrode bearing of trend cross section be the figure of the insulated column of inverted trapezoidal by exposure imaging technique;
The side formation positive photoresist that cross section is the substrate formation anode of the figure of the insulated column of inverted trapezoidal is comprised described, being formed by exposure imaging technique comprises with described what be connected perpendicular to the described negative electrode bearing of trend cross section insulated column that is inverted trapezoidal is the figure of trapezoid or leg-of-mutton insulated column perpendicular to described negative electrode bearing of trend cross section, and described cross section is the insulated column of inverted trapezoidal and cross section is that trapezoid or leg-of-mutton insulated column form cathode insulated column.
After completing the technique preparing anode, the side forming anode at the substrate forming organic insulation photosensitive material forms negative photoresist, be the insulated column of inverted trapezoidal by exposure technology Formation cross-section, then the side formation positive photoresist of anode is formed at the substrate of the insulated column forming inverted trapezoidal, the thickness of described positive photoresist formed is identical with the thickness of the described negative photoresist of formation, to be formed finally by exposure technology and cross section that the described cross section insulated column that is inverted trapezoidal is connected is the insulated column of trapezoid, the insulated column of to be the insulated column of inverted trapezoidal and cross section be in described cross section trapezoid forms cathode insulated column.This preparation technology is simple to operation, is conducive to provide efficiency.In addition, the side that first can also form anode at the described substrate comprising the figure of anode forms positive photoresist, be the insulated column of trapezoid by exposure technology Formation cross-section, then the side formation negative photoresist of anode is formed at the substrate of the insulated column forming trapezoid, the thickness of described negative photoresist formed is identical with the thickness of the described positive photoresist of formation, to be formed finally by exposure technology and cross section that the described cross section insulated column that is inverted trapezoidal is connected is the insulated column of inverted trapezoidal, the insulated column of inverted trapezoidal that to be the cross section of trapezoid insulated column and rear formation be in the cross section first formed forms cathode insulated column jointly.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of PMOLED in prior art;
The planar structure schematic diagram of the PMOLED that Fig. 2 provides for the embodiment of the present invention one;
The cross-sectional view of the PMOLED that Fig. 3 provides for the embodiment of the present invention one;
The cross section of the insulated column that Fig. 4 provides for the embodiment of the present invention is the cross-sectional view of the PMOLED of obtuse triangle;
The cross section of the insulated column that Fig. 5 provides for the embodiment of the present invention is the cross-sectional view of fan-shaped PMOLED;
Fig. 6 is the cross-sectional view of organic function layer;
The method flow diagram preparing passive type organic electroluminescence device that Fig. 7 provides for the embodiment of the present invention two;
Fig. 8 has been the cross-sectional view that preparation comprises the substrate of the figure of anode;
Fig. 9 has been that preparation comprises the cross-sectional view that cross section is the substrate of the figure of the insulated column of inverted trapezoidal;
Figure 10 has been the cross-sectional view that preparation comprises the substrate of the figure of cathode insulated column;
Figure 11 has been the cross-sectional view that preparation comprises the substrate of the figure of organic function layer;
Figure 12 has been that preparation comprises the cross-sectional view that cross section is the substrate of the figure of the insulated column of trapezoid;
Figure 13 prepares the cross-sectional view that cross section is the substrate of the figure of the insulated column of inverted trapezoidal.
Embodiment
Embodiments provide a kind of passive type organic electroluminescence device and preparation method thereof, for solving problem uneven by the display that resistance is bigger than normal caused in prior art.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention one provides a kind of passive type organic electroluminescence device, see Fig. 2 and Fig. 3, described passive type organic electroluminescence device comprises substrate-based and is positioned at least one regularly arranged ray structure on underlay substrate, wherein, a described ray structure is had at least to comprise: underlay substrate 101, be positioned at the anode 102 of underlay substrate 101 side, be positioned at the organic function layer 104 of described anode 102 away from the side of underlay substrate, the cathode insulated column 301 arranged with layer with described organic function layer 104, namely described cathode insulated column 301 is also positioned at the side of described anode away from underlay substrate 101, and the side of described cathode insulated column 301 is obtuse angle with the angle of anode 102 and is connected with functional layer, the angle of opposite side and anode 102 is acute angle, be positioned at the negative electrode 105 above described organic function layer 104 and cathode insulated column 301, described negative electrode 105 covers described organic function layer 104 and cathode insulated column 301, and described negative electrode 105 is horizontal expansion, described multiple negative electrode genesis analysis.
The passive type organic electroluminescence device that the embodiment of the present invention one provides, comprise at least one ray structure, a ray structure is wherein had at least to comprise anode, be positioned at described anode away from the organic function layer of the side of underlay substrate and the cathode insulated column that arranges with layer with described organic function layer, and the side of described cathode insulated column is obtuse angle with the angle of anode and is connected with functional layer, the angle of opposite side and anode is acute angle, negative electrode is made to be acute angle with anode side disconnects only at described cathode insulated column, unidirectional isolation is realized to two adjacent negative electrodes, organic function layer and described cathode insulated column described in described negative electrode lid, increase the area of negative electrode, reduce cathode resistor, reduce the pressure drop caused by resistance, efficiently solve the problem because of bigger than normal the caused display inequality of resistance, improve user's impression.
Further, described underlay substrate 101 is the transparency carriers such as glass substrate, quartz base plate or plastic base.Described anode 102 adopts tin indium oxide (Indium Tin Oxide, ITO), indium zinc oxide (IndiumZink Oxide, IZO), the tin oxide of aluminium-doped zinc oxide, doped with fluorine or other transparent conductive metal oxide.
Further, the angle of the side of described cathode insulated column 301 and described anode 102 acute angle that is is 40 ° ~ 70 °.If the angle of this acute angle is excessive, when preparing negative electrode, cathode material may stick on the side of cathode insulated column, and two adjacent negative electrodes can be caused thoroughly not keep apart; If the angle too small of this acute angle, then cathode insulated column can be caused easily cracked, pollute box environment, reduce yield and the performance of electroluminescent device; Described acute angle, within the scope of this, both can ensure that two adjacent negative electrodes thoroughly disconnected at this acute angle place, and what realize two adjacent negative electrodes is completely isolated, ensures again the stability of cathode insulated column.
Further, the height of described cathode insulated column 301 is 1.5 ~ 2.5 μm.When the height of described cathode insulated column 301 is lower, not easily adjacent certain thickness two negative electrodes that have are disconnected; When the height of described cathode insulated column 301 is higher, due to the restriction of technique, be difficult to make higher insulated column, and it is easily chipping, cracked cathode insulated column also can produce organic functions layer material and/or cathode material and pollute, the quality of organic function layer and negative electrode is reduced, and then the yield of luminescent device and performance are reduced.
Further, described cathode insulated column 301 is parallelogram in the shape perpendicular to the cross section on described negative electrode bearing of trend.Described cathode insulated column 301 is when being parallelogram perpendicular to the cross section on described negative electrode bearing of trend, and preparation technology is simple to operation, is conducive to provide production efficiency.In addition, the cross section of described cathode insulated column can also be other shapes such as fan-shaped, obtuse triangle, as Fig. 4 and Fig. 5.
Further, the base of described parallelogram is 10 ~ 25 μm.In general technology, adopt negative photoresist when forming described cathode insulated column, because negative photoresist has, distinguishing is low, the shortcoming of poor adhesion, therefore needs the base of insulated column to widen; When the base of described parallelogram is 10 ~ 25 μm, when namely the base of described cathode insulated column is 10 ~ 25 μm, described cathode insulated column difficult drop-off can be ensured, also can not affect aperture opening ratio because the base of described cathode insulated column is excessive simultaneously.
Further, described cathode insulated column 301 adopts organic insulation photosensitive material.Can form the organic insulation photosensitive material of trapezoid after adopting the organic insulation photosensitive material that can form inverted trapezoidal after illumination curing and illumination to dissolve, the angle being conducive to being formed side in the embodiment of the present invention and anode is the angle of obtuse angle, opposite side and anode is acute angle cathode insulated column.
Further, see Fig. 6, described organic function layer 104 comprises: be arranged on the luminescent layer 601 above anode 102, and described anode 102 and negative electrode 105 are supplied to driving voltage to described luminescent layer 601, makes described ray structure luminous.
In addition, described organic function layer 104 can also comprise:
Electron transfer layer 602, between described luminescent layer 601 and negative electrode 105, for importing to luminescent layer 601 by electronics.
Hole transmission layer 603, between described luminescent layer 601 and anode 102, for importing to luminescent layer 601 by hole.
Hole blocking layer 604, it is transferred to described negative electrode 105 for blocking hole between described electron transfer layer 602 and described luminescent layer 601;
Electronic barrier layer 605, it is transferred to described anode 102 for block electrons between described hole transmission layer 603 and described luminescent layer 601.
Such as, when described luminescent layer 601 comprises: be positioned at the orange phosphor layer 601a above described hole blocking layer 604, be positioned at the blue fluorescent body 601b above described orange phosphor layer 601a, and be positioned at the green phosphorescent layer 601c above described blue fluorescent body 601b.During described organic function layer work, electronics is injected from described negative electrode 105, from described anode 102 injected hole, electronics imports in luminescent layer 601 by described electron transfer layer 602, hole imports in luminescent layer 601 by described hole transmission layer 603, electronics and hole compound in described luminescent layer 601, form singlet excitons and triplet exciton, described singlet excitons and triplet exciton by excitation state in the process of ground state transition, its energy discharges in the mode of photon and heat energy, wherein, partial photonic is used as backlight, for the display realizing image provides light, concrete, in blue fluorescent body 601b, the exciton of singlet state by excitation state to ground state transition time, send blue fluorescence, in orange phosphor layer 601a and green phosphorescent layer 601c, the exciton of triplet by ground state to excitation state transition time, send green phosphorescent and orange phosphor, described blue-fluorescence and green phosphorescent, orange phosphor compound, forming white light, providing light source for realizing display.
The passive type organic electroluminescence device that the embodiment of the present invention one provides, comprise at least one ray structure, a ray structure is wherein had at least to comprise anode, be positioned at described anode away from the organic function layer of the side of underlay substrate and the cathode insulated column that arranges with layer with described organic function layer, and the side of described cathode insulated column is obtuse angle with the angle of anode and is connected with organic function layer, the angle of opposite side and anode is acute angle, negative electrode is made to be acute angle with anode side disconnects only at described cathode insulated column, unidirectional isolation is realized to two adjacent negative electrodes, described negative electrode covers described organic function layer and described cathode insulated column, increase the area of negative electrode, reduce cathode resistor, reduce the pressure drop caused by resistance, efficiently solve the problem because of bigger than normal the caused display inequality of resistance, improve user's impression.
The embodiment of the present invention two provides a kind of method preparing passive type organic electroluminescence device, and see Fig. 7, described method comprises:
Step 71, provides underlay substrate, forms the figure comprising anode in the side of underlay substrate;
Step 72, the side forming anode at the described substrate comprising the figure of anode forms the figure comprising cathode insulated column;
Step 73, the side forming cathode insulated column at the described substrate comprising the figure of cathode insulated column forms the figure comprising organic function layer; Described cathode insulated column is established and is arranged with layer with described organic function layer, and the side of described cathode insulated column is obtuse angle with the angle of anode and is connected with organic function layer, and the angle of opposite side and anode is acute angle;
Step 74, the side forming functional layer at the described substrate comprising the figure of organic function layer forms the figure comprising negative electrode, and described negative electrode covers described organic function layer and described cathode insulated column.
Further, the angle in the side of described cathode insulated column 301 and described anode 102 being is 40 ° ~ 70 °.When the angle of this acute angle is excessive, two adjacent negative electrodes may be caused thoroughly not keep apart, when the angle too small of this acute angle, then cathode insulated column can be caused easily cracked, pollute box environment; Described acute angle, within the scope of this, both can ensure that two adjacent negative electrodes thoroughly disconnected at this acute angle place, and what realize two adjacent negative electrodes is completely isolated, ensures again the stability of cathode insulated column.
Further, the height of described cathode insulated column 301 is 1.5 ~ 2.5 μm.When the height of described cathode insulated column is lower, not easily adjacent certain thickness two negative electrodes that have are disconnected; When the height of described cathode insulated column is higher, due to the restriction of technique, be difficult to make, and it is easily chipping, cracked cathode insulated column also can produce organic functions layer material and/or cathode material and pollute, the quality of organic function layer and negative electrode is reduced, and then the yield of display device and performance are reduced.
Further, described cathode insulated column is being parallelogram perpendicular to the cross section on described negative electrode bearing of trend.Described cathode insulated column is when being parallelogram perpendicular to the cross section on described negative electrode bearing of trend, and preparation technology is simple to operation, is conducive to provide production efficiency.In addition, the cross section of described cathode insulated column can also be other shapes such as fan-shaped, obtuse triangle.
Further, the base of described parallelogram is 10 ~ 25 μm.In general technology, adopt negative photoresist when forming described cathode insulated column, because negative photoresist has, distinguishing is low, the shortcoming of poor adhesion, therefore needs the base of insulated column to widen; When the base of described parallelogram is 10 ~ 25 μm, when namely the base of described cathode insulated column is 10 ~ 25 μm, described cathode insulated column difficult drop-off can be ensured, also can not affect aperture opening ratio because the base of described cathode insulated column is excessive simultaneously.
Further, described method also comprises: adopt organic insulation photosensitive material to prepare described cathode insulated column.
Described cathode insulated column 301 adopts organic insulation photosensitive material.Can form the organic insulation photosensitive material of trapezoid after adopting the organic insulation photosensitive material that can form inverted trapezoidal after illumination curing and illumination to dissolve, the angle being conducive to being formed side in the embodiment of the present invention and anode is the angle of obtuse angle, opposite side and anode is acute angle cathode insulated column.
Further, the side forming anode at the described substrate comprising the figure of anode forms the figure comprising cathode insulated column, specifically comprises:
The side forming anode at the described substrate comprising the figure of anode forms negative photoresist, and comprising perpendicular to described negative electrode bearing of trend cross section by the formation of exposure imaging technique is the insulated column of inverted trapezoidal;
The side formation positive photoresist that cross section is the substrate formation anode of the figure of the insulated column of inverted trapezoidal is comprised described, being formed by exposure imaging technique comprises with described what be connected perpendicular to the described negative electrode bearing of trend cross section insulated column that is inverted trapezoidal is the figure of trapezoid or leg-of-mutton insulated column perpendicular to described negative electrode bearing of trend cross section, and described cross section is the insulated column of inverted trapezoidal and cross section is that trapezoid or leg-of-mutton insulated column form cathode insulated column.
After completing the technique preparing anode, the side forming anode at the substrate forming organic insulation photosensitive material forms negative photoresist, be the insulated column of inverted trapezoidal by exposure imaging technique and illumination curing technique Formation cross-section, then the side formation positive photoresist of anode is formed at the substrate of the insulated column forming inverted trapezoidal, the thickness of described positive photoresist formed is identical with the thickness of the described negative photoresist of formation, the cross section be connected finally by exposure technology and the illumination dissolution process insulated column that to be formed with described cross section be inverted trapezoidal is the insulated column of trapezoid, the insulated column of to be the insulated column of inverted trapezoidal and cross section be in described cross section trapezoid forms cathode insulated column.This preparation technology is simple to operation, is conducive to provide efficiency.In addition, the side that first can also form anode at the described substrate comprising the figure of anode forms positive photoresist, being formed perpendicular to described negative electrode bearing of trend cross section by exposure imaging technique is the insulated column of trapezoid, then the side formation negative photoresist of anode is formed at the substrate of the insulated column forming trapezoid, the thickness of described negative photoresist formed is identical with the thickness of the described positive photoresist of formation, formed with described what be connected perpendicular to the described negative electrode bearing of trend cross section insulated column that is inverted trapezoidal is the insulated column of inverted trapezoidal perpendicular to described negative electrode bearing of trend cross section finally by exposure technology, the insulated column of inverted trapezoidal that to be the cross section of trapezoid insulated column and rear formation be in the cross section first formed forms cathode insulated column jointly.
The embodiment of the present invention three provides a kind of method preparing passive type organic electroluminescence device, and described method comprises:
The first step, see Fig. 8, underlay substrate 101 uses magnetron sputtering method deposit indium oxide layer tin transparent conductive film, and by patterning processes, forms the figure comprising anode 102.
Second step, see Fig. 9, the substrate of figure comprising anode 102 forms one deck negative photo glue material, is the insulated column 301a of inverted trapezoidal by Formation cross-section after illumination curing.
3rd step, see Figure 10, at Formation cross-section be the insulated column of inverted trapezoidal substrate on form one deck positive photoresist, after being dissolved by illumination, Formation cross-section is the insulated column 301b of trapezoid, and the insulated column 301b of to be the insulated column 301a of inverted trapezoidal and described cross section be in described cross section trapezoid forms the cathode insulated column 301 that cross section is parallelogram.In general technology, preferably use negative photoresist peace intelligence CTP-100 material and the beautiful DL-100 material in positive-tone photo northern Shandong.
4th step, see Figure 11, on the substrate completing cathode isolation Column preparation, forms the figure comprising organic function layer 104 by patterning processes.
5th step, see Fig. 3, on the substrate of figure comprising organic function layer 104, is formed by patterning processes and comprises the pattern of negative electrode 105, and described negative electrode generally adopts the low workfunction metal such as magnesium, aluminium material or itself and silver, copper, golden alloy material.
In addition, complete figure substrate prepared by anode being formed and comprises cathode insulated column, can also specifically comprise:
The first step, see Figure 12, is formed positive photoresist completing on substrate prepared by anode, is formed comprise the figure that cross section is the insulated column 301b of trapezoid by illumination curing technique.
Second step, see Figure 13, form negative photoresist comprising on the substrate that cross section is the figure of the insulated column 301b of trapezoid, the thickness of described negative photoresist formed is identical with the thickness of the described positive photoresist of formation, formed finally by illumination dissolution process and cross section that the described cross section insulated column that is trapezoid is connected is the insulated column 301a of inverted trapezoidal, the insulated column of inverted trapezoidal that to be the cross section of trapezoid insulated column and rear formation be in the cross section first formed forms cathode insulated column jointly.
The method preparing passive type organic electroluminescence device that the embodiment of the present invention two and three provides, the passive type organic electroluminescence device of preparation comprises at least one ray structure, a ray structure is wherein had at least to comprise anode, be positioned at described anode away from the organic function layer of the side of underlay substrate and the cathode insulated column that arranges with layer with described organic function layer, and the side of described cathode insulated column is obtuse angle with the angle of anode and is connected with functional layer, the angle of opposite side and anode is acute angle, negative electrode is made to be acute angle with anode side disconnects only at described cathode insulated column, unidirectional isolation is realized to two adjacent negative electrodes, described negative electrode covers described organic function layer and described cathode insulated column, increase the area of negative electrode, reduce cathode resistor, reduce the pressure drop caused by resistance, efficiently solve the problem because of bigger than normal the caused display inequality of resistance, improve user's impression.
To sum up, the electroluminescent device that the embodiment of the present invention provides comprises at least one ray structure, a ray structure is wherein had at least to comprise anode, be positioned at described anode away from the organic function layer of the side of underlay substrate and the cathode insulated column that arranges with layer with described organic function layer, and the side of described cathode insulated column is obtuse angle with the angle of anode and is connected with functional layer, the angle of opposite side and anode is acute angle, negative electrode is made to be acute angle with anode side disconnects only at described cathode insulated column, unidirectional isolation is realized to two adjacent negative electrodes, described negative electrode covers described organic function layer and described cathode insulated column, increase the area of negative electrode, reduce cathode resistor, reduce the pressure drop caused by resistance, efficiently solve the problem because of bigger than normal the caused display inequality of resistance, improve image displaying quality.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (13)
1. a passive type organic electroluminescence device, comprises underlay substrate, at least one the regularly arranged ray structure be positioned on underlay substrate, it is characterized in that having at least a described ray structure to comprise:
Anode, is positioned at the side of described underlay substrate;
Organic function layer, is positioned at the side of described anode away from underlay substrate;
Cathode insulated column, is arranged with layer with described organic function layer, and the side of described cathode insulated column is obtuse angle with the angle of anode and is connected with organic function layer, and the angle of opposite side and anode is acute angle;
Negative electrode, is positioned at described organic function layer and cathode insulated column away from underlay substrate side, covers described organic function layer and cathode insulated column.
2. passive type organic electroluminescence device as claimed in claim 1, it is characterized in that, described acute angle is 40 ° ~ 70 °.
3. passive type organic electroluminescence device as claimed in claim 1, it is characterized in that, the height of described cathode insulated column is 1.5 ~ 2.5 μm.
4. passive type organic electroluminescence device as claimed in claim 1, it is characterized in that, described cathode insulated column is parallelogram in the shape perpendicular to the cross section on described negative electrode bearing of trend.
5. passive type organic electroluminescence device as claimed in claim 4, it is characterized in that, the base of described parallelogram is 10 ~ 25 μm.
6. passive type organic electroluminescence device as claimed in claim 1, is characterized in that, described cathode insulated column adopts organic insulation photosensitive material.
7. prepare a method for passive type organic electroluminescence device, it is characterized in that, described method comprises:
Underlay substrate is provided, forms the figure comprising anode in the side of described underlay substrate;
The side forming anode at the described substrate comprising the figure of anode forms the figure comprising cathode insulated column;
The side forming cathode insulated column at the described substrate comprising the figure of cathode insulated column forms the figure comprising organic function layer, described cathode insulated column and described organic function layer are arranged with layer, and the side of described cathode insulated column is obtuse angle with the angle of anode and is connected with organic function layer, the angle of opposite side and anode is acute angle;
The side forming organic function layer at the described substrate comprising the figure of organic function layer forms the figure comprising negative electrode, and described negative electrode covers described organic function layer and described cathode insulated column.
8. method as claimed in claim 7, it is characterized in that, described acute angle is 40 ° ~ 70 °.
9. method as claimed in claim 7, it is characterized in that, the height of described cathode insulated column is 1.5 ~ 2.5 μm.
10. method as claimed in claim 7, it is characterized in that, described cathode insulated column is parallelogram in the shape perpendicular to the cross section on described negative electrode bearing of trend.
11. methods as claimed in claim 10, is characterized in that, the base of described parallelogram is 10 ~ 25 μm.
12. methods as claimed in claim 7, it is characterized in that, described method also comprises: adopt organic insulation photosensitive material to prepare described cathode insulated column.
13. methods as claimed in claim 12, is characterized in that, the side forming anode at the described substrate comprising the figure of anode forms the figure comprising cathode insulated column, specifically comprises:
The side forming anode at the described substrate comprising the figure of anode forms negative photoresist, is formed that to comprise perpendicular to described negative electrode bearing of trend cross section be the figure of the insulated column of inverted trapezoidal by exposure imaging technique;
The side formation positive photoresist that cross section is the substrate formation anode of the figure of the insulated column of inverted trapezoidal is comprised described, being formed by exposure imaging technique comprises with described what be connected perpendicular to the described negative electrode bearing of trend cross section insulated column that is inverted trapezoidal is the figure of trapezoid or leg-of-mutton insulated column perpendicular to described negative electrode bearing of trend cross section, and described cross section is the insulated column of inverted trapezoidal and cross section is that trapezoid or leg-of-mutton insulated column form cathode insulated column.
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