CN107785493B - Organic light emitting display and display device - Google Patents
Organic light emitting display and display device Download PDFInfo
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- CN107785493B CN107785493B CN201610754483.3A CN201610754483A CN107785493B CN 107785493 B CN107785493 B CN 107785493B CN 201610754483 A CN201610754483 A CN 201610754483A CN 107785493 B CN107785493 B CN 107785493B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
- H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
- H10K50/13—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2101/00—Properties of the organic materials covered by group H10K85/00
- H10K2101/10—Triplet emission
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Abstract
The present invention relates to a kind of organic light emitting displays.The organic light emitting display, cathode are arranged on substrate, and organic luminous layer includes the second optical material layer of blue light material layer, partial occlusion blue light material layer；Second optical material layer has the firstth area and the secondth area；The organic light emitting display further includes being arranged with first area's face and for converting the light conversion layer that the third light emission goes out for second of the light that the firstth area projects；One in green light and feux rouges of second of light, another in green light and feux rouges of the third light.Organic light emitting display of the invention forms blue light material layer and only needs using aperture mask plate；A less accurate mask plate need to be used by forming the second optical material layer only；Light conversion layer can not used mask plate, therefore can be reduced the usage quantity of accurate mask plate due to the property of itself.The invention also discloses a kind of display devices.
Description
Technical field
The present invention relates to organic light emitting display technical fields, fill more particularly to a kind of organic light emitting display and display
It sets.
Background technique
The image of the sub-pixel display colour of RGB can be used in organic light-emitting display device, and since its is excellent
Brightness and excitation purity and by as next generation display device.In order to improve the resolution ratio of display device, need to reduce the ruler of pixel
Very little, mask plate opening used in this way will also become smaller, that is, need using accurate mask plate, generally, need using three essences
Close mask plate forms blue light region, green Region and red light district respectively.But it is influenced by accurate mask plate preparation process, this opening
Size be conditional, therefore limit the raising of organic display device resolution ratio.In addition, improving work using accurate mask plate
Skill difficulty, and the yields of product reduces.
Summary of the invention
Based on this, it is necessary to for needing to cover using more precision in existing organic light emitting display preparation process
The problem of diaphragm plate, provides a kind of organic light emitting display for reducing accurate mask plate and using.
A kind of organic light emitting display, comprising:
Substrate；
Cathode, setting is over the substrate；
Anode is oppositely arranged with the cathode；
Functional structure layer, between the cathode and the anode；The functional structure layer includes organic luminous layer；Institute
Stating organic luminous layer includes blue light material layer and the second optical material layer that can issue second of light；The blue light material layer
Close to the side of the cathode in the organic luminous layer；Second optical material layer is formed on the blue light material layer
And blue light material layer described in partial occlusion；Second optical material layer has the firstth area and the secondth area；
And light conversion layer, it is arranged with firstth area face, and second of the light for projecting firstth area converts
Go out for the third light emission；
One in green light and feux rouges of second of the light, the third described light is another in green light and feux rouges
It is a.
Compared with prior art, it when organic light emitting display of the invention preparation, forms blue light material layer and only needs to make
With aperture mask plate；A less accurate mask plate (i.e. low precision exposure mask need to be used by forming the second optical material layer only
Plate)；Light conversion layer can not use mask plate due to the property of itself；Therefore only need during the preparation process one less
Accurate mask plate.The access times for greatly reducing accurate mask plate in this way, thus greatly reduce technology difficulty,
Improve the yields of product simultaneously.Organic light emitting display of the invention, not by the second optical material layer in blue light material layer
The region blocked forms blue light region, and the region blocked does not shine；Shape is distinguished in the firstth area and the secondth area in second optical material layer
At red light district or green Region, to realize three-colour light-emitting.In addition, above-mentioned organic light emitting display is inverted structure, the second light
Material layer is formed on blue material layer, i.e., the second optical material layer is later than blue light material layer and is formed, and can effectively reduce in this way
Influence of two optical material layers to blue light material layer, and then improve the performance of organic light emitting display.
The light conversion layer includes quanta point material in one of the embodiments,.
The substrate is transparent substrates in one of the embodiments,；The light conversion layer setting is over the substrate.
The light conversion layer is located at the surface of side of the substrate far from the cathode in one of the embodiments,
On.
Second optical material layer includes hot activation delayed fluorescence material in one of the embodiments,.
The pattern of the light conversion layer is formed by way of photoetching in one of the embodiments,.
In one of the embodiments, the blue light material layer with a thickness of 10~40nm.
The functional structure layer further includes being located at the organic luminous layer close to the anode in one of the embodiments,
The hole injection layer and hole transmission layer of side and positioned at the organic luminous layer close to the cathode side electronics pass
Defeated layer.
The functional structure layer further includes being located at the organic luminous layer and electronics biography in one of the embodiments,
Hole blocking layer between defeated layer.
The present invention also provides a kind of display devices.
A kind of display device comprising organic light emitting display provided by the present invention.
Above-mentioned display device, due to using organic light emitting display provided by the present invention, therefore technology difficulty is low, non-defective unit
Rate is high.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the organic light emitting display of embodiment 1.
Fig. 2 is the structural schematic diagram of the organic light emitting display of embodiment 2.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
It should be noted that it can directly on the other element when element is referred to as " being set to " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more
Any and all combinations of relevant listed item.
It is the structural schematic diagram of the organic light emitting display of embodiment 1 referring to Fig. 1, Fig. 1.A kind of organic light emitting display
Part 100, including substrate 110, cathode 120, anode 130, functional structure layer 140 and light conversion layer 160.
Wherein, the main function of substrate 110 is to provide the carrier of deposition for other components.The present invention does not have substrate 110
It is specifically limited, various substrates known in those skilled in the art can be used.In the present embodiment, organic light emitting display
100 shine the bottom of for, and substrate 110 is transparent substrates.It is, of course, understood that organic light emitting display of the invention is not
It is confined to bottom to shine, can also be that top shines.Substrate 110 can be opaque lining in the luminous organic light emitting display in top
Bottom.
Wherein, cathode 120 is formed on substrate 110, i.e., cathode 120 is located on the upper surface of substrate 110.Cathode 120 can
To be made of inorganic material or organic conductive polymer, wherein inorganic material can using tin indium oxide (ITO), zinc oxide,
The metal oxides such as indium zinc oxide, can also be using higher metals of work functions such as gold, copper, silver.In the present embodiment, cathode
120 be indium-tin oxide electrode.
Wherein, anode 130 is generally using the lower metal of the work functions such as silver, lithium, magnesium, calcium, strontium, aluminium, indium or metallization
It closes object or alloy is made.The present invention is preferably that magnesium metal silver is total to electrode evaporation namely anode 130 as magnesium alloy silver electrode.
Wherein, functional structure layer 140 is between cathode 120 and anode 130.In the present embodiment, from anode 130 to yin
120 direction of pole (i.e. direction in Fig. 1 from the top down), functional structure layer 140 successively include hole injection layer 141, hole transport
Layer 142, organic luminous layer, hole blocking layer 145 and electron transfer layer 146.It is, of course, understood that functional structure layer
140 are not limited to above structure, the side of separate organic luminous layer of electron transfer layer 146 can be provided with electricity
Sub- implanted layer；Electronic barrier layer can also be set between hole transmission layer 142 and organic luminous layer；Or it is not provided with hole resistance
Barrier 145.It is understood that hole injection layer 141, hole transmission layer 142, electron injecting layer, electron transfer layer 146, sky
Cave barrier layer 145 and electronic barrier layer, these functional layers those skilled in the art can select to be arranged according to the actual situation.
Specifically, organic luminous layer includes blue light material layer 144 and green light material layer 143.144, blue light material layer
Close to the side of cathode 120 in organic luminous layer, green light material layer 143 is located in organic luminous layer close to the one of anode 130
Side.Green light material layer 143 is formed on blue light material layer 144, and partial occlusion blue light material layer 144.
Wherein, blue light material layer 144 is deposited using aperture mask plate, and thickness is preferably 10-40nm.Such blue light
Material layer 144 can serve as the optical compensating layer of green light material layer 143.In the present embodiment, blue light material layer 144 with a thickness of
35nm。
Wherein, green light material layer 143 is deposited using low precision mask plate, and thickness is preferably 10-60nm.In this reality
Apply in example, green light material layer 143 with a thickness of 30nm.
Preferably, blue light material layer 144 uses fluorescent material, and green light material layer 143 uses hot activation delayed fluorescence material
(TADF) or phosphor material.In the present embodiment, the main body in green light material layer 143 is hot activation delayed fluorescence material
(TADF), dyestuff uses phosphorescent coloring.Exciton can be further limited in green light material layer 143 in this way, thus effectively
Blue light material layer 144 and 143 lap of green light material layer is avoided to shine.
In the present embodiment, blue light material layer 144, green light material layer 143 are all made of single main body luminescent material, in this way can be with
Organic light emitting display manufacturing process difficulty is reduced, the yield of organic light emitting display is promoted.It will of course be understood that
It is that green light material layer 143 can also be using double main body luminescent materials.
In the present invention, green light material floor 143 has the first area 1 and the second area 2.In the present embodiment, the first area 1 is located at
The left side in the second area 2.
Wherein, the main function of light conversion layer 160 is to convert the third light for second of light, such as green light is converted
For feux rouges, or by feux rouges convert green light.Specifically, in the present embodiment, light conversion layer 160 is used for green light material layer 143
The first area 1 project green light be converted into feux rouges injection, so that red light-emitting area is formed, to form rgb pixel unit.It can manage
Solution, light conversion layer 160 is located at the side of the light emission side of green light material layer 143.
In the present embodiment, light conversion layer 160 is arranged on substrate 110.More specifically, light conversion layer 160 is located at substrate
On the surface of 110 sides far from cathode 120.It that is to say, light conversion layer 160 is located on the lower surface of substrate 110.Light turns in this way
Change layer 160 and cathode 120, anode 130, functional structure layer 140 are located at the two sides of substrate 160, the setting of light conversion layer 160 will not
Adverse effect is caused to these components.In addition, this also have the advantage that the production of light conversion layer 160.
In the present embodiment, light conversion layer 160 is made of quanta point material.Quanta point material is those skilled in the art
Known, details are not described herein！It is, of course, understood that light conversion layer 160 can not also use quanta point material.
In the present embodiment, the pattern of light conversion layer 160 is formed by way of photoetching.Specifically, first by quantum dot material
Material is mixed with photoresist, and then on substrate by photoresist coating, then the mode of exposure-development, takes out the material in other regions
Material, retains the quanta point material of presumptive area, to realize the patterning of light conversion layer 160.It is, of course, understood that light
The formation of conversion coating 160 is not limited to above-mentioned form.
In the present embodiment, the region 4 that blue light material floor 144 is not blocked by green light material floor 143 forms blue light emitting area；
And it is not shone by the region 3 that green light material layer 143 blocks.This is because since hole is multiple with electronics at green light material layer 143
It closes, thus make hole that can not reach the region 3 of blue light material layer 144, and then hole and electronics can not combine, therefore the region 3 is not
Blue light can be generated.Since the region 3 of blue light material layer 144 does not stop electronics, electronics can pass through the region 3 and enter green light material
The bed of material 143, electronics and hole can combine at green light material layer 143, therefore entire green light material layer 143 can be with greening
Light.The green light that first area 1 of green light material floor 143 issues injects light conversion layer by each layer below green light material layer 143
In 160, the conversion through light conversion layer 160 is projected with feux rouges (mark the arrow of R to represent in Fig. 1), to form red light district.
The green light (mark the arrow of G to represent in Fig. 1) that second area 2 of green light material floor 143 issues, by under green light material layer 143
Each layer in face is projected from substrate 110, to form green Region.The blue light that the region 4 of blue light material layer 144 issues is (in Fig. 1
The arrow of B is marked to represent), through each layer below basket optical material layer 144, projected from substrate 110, to form blue light region.
Referring to fig. 2, Fig. 2 is the structural schematic diagram of the organic light emitting display of embodiment 2.Organic hair in embodiment 2
Component identical with 1 label of embodiment is identical in light display device 200, and details are not described herein！
With embodiment 1 except that: in example 2, with red light material layer 243 replace green light material layer 143.Equally
Ground, red light material floor 243 have the first area 5 and the second area 6.The light conversion layer 160 of embodiment 1, light are replaced with light conversion layer 260
Conversion coating 260 is used to feux rouges converting green light.Specifically, light conversion layer 260 and 6 face of the secondth area of red light material floor 243 are set
It sets.
In example 2, the region 4 that blue light material floor 144 is not blocked by red light material floor 243 forms blue light emitting area；
And it is not shone by the region 3 that red light material layer 243 blocks.This is because since hole is multiple with electronics at red light material layer 243
It closes, thus make hole that can not reach the region 3 of blue light material layer 144, and then hole and electronics can not combine, therefore the region 3 is not
Blue light can be generated.Since the region 3 of blue light material layer 144 does not stop electronics, electronics can pass through the region 3 and enter feux rouges material
The bed of material 243, electronics and hole can combine at red light material layer 243, therefore entire red light material layer 243 can be rubescent
Light.The green light that second area 6 of red light material floor 243 issues injects light conversion layer by each layer below red light material layer 243
In 260, the conversion through light conversion layer 260 is projected with green light (mark the arrow of G to represent in Fig. 1), to form green Region.
The feux rouges (mark the arrow of R to represent in Fig. 1) that first area 5 of red light material floor 243 issues, by under red light material layer 243
Each layer in face is projected from substrate 110, to form red light district.The blue light that the region 4 of blue light material layer 144 issues is (in Fig. 1
The arrow of B is marked to represent), through each layer below basket optical material layer 144, projected from substrate 110, to form blue light region.
Compared with prior art, it when organic light emitting display of the invention preparation, forms blue light material layer and only needs to make
With aperture mask plate；A less accurate mask plate (i.e. low precision exposure mask need to be used by forming the second optical material layer only
Plate)；Light conversion layer can not use mask plate due to the property of itself；Therefore only need during the preparation process one less
Accurate mask plate.The access times for greatly reducing accurate mask plate in this way, thus greatly reduce technology difficulty,
Improve the yields of product simultaneously.In addition, above-mentioned organic light emitting display is inverted structure, the second optical material layer is formed in
On blue material layer, i.e., the second optical material layer is later than blue light material layer and is formed, and can effectively reduce the second optical material layer pair in this way
The influence of blue light material layer, and then improve the performance of organic light emitting display.
The present invention also provides a kind of display device, which includes organic light emitting display provided by the present invention
Part.
Other components in display device can use structure known in those skilled in the art, and details are not described herein！
Above-mentioned display device, due to using organic light emitting display provided by the present invention, therefore technology difficulty is low, non-defective unit
Rate is high.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of organic light emitting display characterized by comprising
Substrate；
Cathode, setting is over the substrate；
Anode is oppositely arranged with the cathode；
Functional structure layer, between the cathode and the anode；The functional structure layer includes organic luminous layer；It is described to have
Machine luminescent layer includes blue light material layer and the second optical material layer that can issue second of light；The blue light material layer is located at
Close to the side of the cathode in the organic luminous layer；Second optical material layer is formed on the blue light material layer and portion
Divide and blocks the blue light material layer；Second optical material layer has the firstth area and the secondth area；
And light conversion layer, it is arranged with firstth area face, and for converting for second of the light that firstth area projects
Three kinds of light emissions go out；
One in green light and feux rouges of second of the light, another in green light and feux rouges of the third described light.
2. organic light emitting display according to claim 1, which is characterized in that the light conversion layer includes quantum dot material
Material.
3. organic light emitting display according to claim 1, which is characterized in that the substrate is transparent substrates；It is described
Light conversion layer is arranged over the substrate.
4. organic light emitting display according to claim 3, which is characterized in that the light conversion layer is located at the substrate
On the surface of side far from the cathode.
5. organic light emitting display according to claim 1, which is characterized in that second optical material layer includes heat shock
Delayed fluorescence material living.
6. organic light emitting display according to claim 1, which is characterized in that the pattern of the light conversion layer passes through light
The mode at quarter is formed.
7. organic light emitting display according to claim 1, which is characterized in that the blue light material layer with a thickness of 10
~40nm.
8. organic light emitting display according to claim 1, which is characterized in that the functional structure layer further includes being located at
The organic luminous layer is close to the hole injection layer and hole transmission layer of the anode side and positioned at the organic light emission
Electron transfer layer of the layer close to the cathode side.
9. organic light emitting display according to claim 8, which is characterized in that the functional structure layer further includes being located at
Hole blocking layer between the organic luminous layer and the electron transfer layer.
10. a kind of display device, which is characterized in that including the described in any item organic light emitting displays of claim 1-9.
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| CN103839960A (en) * | 2012-11-23 | 2014-06-04 | 友达光电股份有限公司 | Organic light-emitting displayer and manufacturing method thereof |
| CN103904103A (en) * | 2012-12-27 | 2014-07-02 | 乐金显示有限公司 | Organic light emitting display device and method of manufacturing the same |
| CN105493288A (en) * | 2015-09-15 | 2016-04-13 | 京东方科技集团股份有限公司 | Organic light emitting pixel unit and manufacturing method, display panel and display device |
| CN105590945A (en) * | 2014-11-17 | 2016-05-18 | 北京维信诺科技有限公司 | Organic light-emitting display device containing quantum dots, display method and application thereof |
| CN105810846A (en) * | 2014-12-31 | 2016-07-27 | 北京维信诺科技有限公司 | Organic electroluminescence device |
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2016
- 2016-08-29 CN CN201610754483.3A patent/CN107785493B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103839960A (en) * | 2012-11-23 | 2014-06-04 | 友达光电股份有限公司 | Organic light-emitting displayer and manufacturing method thereof |
| CN103904103A (en) * | 2012-12-27 | 2014-07-02 | 乐金显示有限公司 | Organic light emitting display device and method of manufacturing the same |
| CN105590945A (en) * | 2014-11-17 | 2016-05-18 | 北京维信诺科技有限公司 | Organic light-emitting display device containing quantum dots, display method and application thereof |
| CN105810846A (en) * | 2014-12-31 | 2016-07-27 | 北京维信诺科技有限公司 | Organic electroluminescence device |
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