CN105280682A - OLED display panel and preparing method thereof - Google Patents
OLED display panel and preparing method thereof Download PDFInfo
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- CN105280682A CN105280682A CN201510567901.3A CN201510567901A CN105280682A CN 105280682 A CN105280682 A CN 105280682A CN 201510567901 A CN201510567901 A CN 201510567901A CN 105280682 A CN105280682 A CN 105280682A
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Abstract
The invention discloses an OLED display panel and a preparing method thereof, relating to the technical field of the manufacturing of organic photoelectric devices. A resonance layer including nano-particles is arranged in each sub-pixel, plasma resonance is generated by the light emitted by an organic luminescent layer of each sub-pixel by means of the nano-particles, and the light extraction efficiency of the OLED display panel can be effectively improved; and meanwhile, each sub-pixel is provided with the physical dimension of the matched nano-particles based on the waveband of the light, and the nano-particles in each sub-pixel are in a corresponding type and have no bad influence to the light in the sub-pixel, so that the light extraction efficiency is further improved.
Description
Technical field
The present invention relates to the manufacturing technology field of organic electro-optic device, particularly relate to a kind of OLED display panel and preparation method thereof.
Background technology
Due to Organic Light Emitting Diode (OrganicLightEmittingDiode, be called for short OLED), be also called ORGANIC ELECTROLUMINESCENCE DISPLAYS (OrganicElectroluminescenceDisplay, be called for short OrganicELDisplay) there is self-luminous (namely without the need to backlight module) characteristic, make OLED display screen can accomplish more frivolous, wide viewing angle, low power consuming etc., therefore OLED display screen is considered as by industry the Display Technique of future generation replacing liquid crystal display (LCD).
But in OLED, the light of nearly 80% can be limited in device cannot bright dipping and loss, approximately only there is the light of 20% can outgoing OLED, and then cause light extraction efficiency not high; So the light extraction efficiency effectively improving OLED has become current industry key technology, but from the light extraction efficiency of raising OLED that current process technological means only can be limited.
Summary of the invention
For above-mentioned Problems existing, the invention provides a kind of OLED display panel and preparation method thereof, mainly based on surface plasma resonance (SurfacePlasmonResonance, be called for short SPR) effectively improve the light extraction efficiency of OLED display device, to promote the popularization and application of OLED display device.
To achieve these goals, the technical scheme that the present invention takes is:
A kind of OLED display panel, comprising:
Array base palte, is provided with viewing area, and described viewing area is provided with multiple first sub-pixel, multiple second sub-pixel and multiple 3rd sub-pixel;
Organic luminous layer, be arranged on be arranged in described viewing area described array base palte on described multiple first sub-pixels, multiple second sub-pixel and multiple 3rd sub-pixel, described organic luminous layer sends the light of different-waveband respectively at described first sub-pixel, the second sub-pixel and the 3rd sub-pixel; And
Resonant layer, be arranged on be arranged in described viewing area described array base palte on described multiple first sub-pixels, multiple second sub-pixel and multiple 3rd sub-pixel, and described organic luminous layer launch light therethrough described in resonant layer penetrate described OLED display panel; Wherein
Described resonant layer comprises majority first nano particle laid respectively in described first sub-pixel, be arranged in majority second nano particle of described second sub-pixel and be arranged in majority the 3rd nano particle of described 3rd sub-pixel, and described first nano particle, described second nano particle and the described 3rd nano particle light of described different-waveband that corresponding described organic luminous layer is launched respectively forms surface plasma resonance.
As a preferred embodiment, in above-mentioned OLED display panel:
Described resonant layer comprises at least one coating layer, and described first nano particle, described second nano particle and described 3rd nano particle mutually do not mix in described coating layer.
As a preferred embodiment, in above-mentioned OLED display panel:
The material of described coating layer is siloxane-based organic material or siloxane-based organo metallic material.
As a preferred embodiment, in above-mentioned OLED display panel:
Described first nano particle, described second nano particle and described 3rd nano particle all have at least double-layer separate to be distributed in described coating layer.
As a preferred embodiment, in above-mentioned OLED display panel:
The wave band of the light that the physical parameter of described first nano particle, the second nano particle and the 3rd nano particle is launched with the described organic luminous layer in described first sub-pixel, the second sub-pixel and the 3rd sub-pixel respectively mates, and forms described surface plasma resonance with the light launched with described organic luminous layer respectively.
As a preferred embodiment, in above-mentioned OLED display panel:
The light that described organic luminous layer is launched in described first sub-pixel is ruddiness, and described first nano particle is material be gold rod shaped particles, the length-width ratio of described rod shaped particles is 1.5:1 ~ 2.5:1.
As a preferred embodiment, in above-mentioned OLED display panel:
The light that described organic luminous layer is launched in described second sub-pixel is green glow, and described second nano particle is material is gold or silver-colored spheric granules; Or,
Described second nano particle is band caryosphere body, and the enclosure material of described band caryosphere body is gold, and the kernel material of described band caryosphere body is silica.
As a preferred embodiment, in above-mentioned OLED display panel:
The light that described organic luminous layer is launched in described 3rd sub-pixel is blue light, and described 3rd nano particle is material is gold or silver or the spheric granules of silver alloy.
As a preferred embodiment, in above-mentioned OLED display panel:
Described nano particle is of a size of 5 ~ 30nm.
As a preferred embodiment, above-mentioned OLED display panel also comprises:
Dielectric layer, is arranged on described array base palte, and in described dielectric layer, embedding is provided with TFT device;
Pixel defining layer, covers the upper surface of described dielectric layer, and the position in described pixel defining layer corresponding described first sub-pixel, described second sub-pixel and described 3rd sub-pixel forms groove respectively;
First electrode, is positioned at the described bottom portion of groove of described dielectric layer upper surface, and is connected via the through hole being positioned at dielectric layer with described TFT device;
Hole transmission layer, is arranged on described first electrode, and is positioned under described organic luminous layer;
Electron transfer layer, is arranged on described organic luminous layer;
Second electrode, is arranged on described electron transfer layer and described pixel defining layer; And
Base plate for packaging, is arranged on described second electrode.
As a preferred embodiment, in above-mentioned OLED display panel:
Described first electrode is transparency electrode,
Described resonant layer is between the upper surface and described dielectric layer of described array base palte; Or
Described resonant layer is between the upper surface and described hole transmission layer of described first electrode.
As a preferred embodiment, in above-mentioned OLED display panel:
When described resonant layer is between the upper surface and described hole transmission layer of described first electrode, described resonant layer is arranged in the groove of described pixel defining layer, and described hole transmission layer covers the upper surface of described resonant layer, and described OLED display panel also comprises:
Resilient coating, is arranged between described array base palte and described dielectric layer;
Electron injecting layer, is arranged between described electron transfer layer and described second electrode;
Light removing layer, is arranged between described base plate for packaging and described second electrode.
As a preferred embodiment, in above-mentioned OLED display panel:
Described second electrode is transparency electrode, and described resonant layer covers the upper surface of described second electrode.
As a preferred embodiment, in above-mentioned OLED display panel, described first electrode is transparency electrode, also comprises in described OLED display panel:
Light removing layer, covers the upper surface of described second electrode; Wherein
Described resonant layer is between described smooth removing layer and described base plate for packaging.
As a preferred embodiment, in above-mentioned OLED display panel:
Described dielectric layer comprises gate insulator stacked successively, insulating barrier and flatness layer.
As a preferred embodiment, in above-mentioned OLED display panel:
Described first electrode is anode, and described second electrode is negative electrode.
As a preferred embodiment, in above-mentioned OLED display panel, described array base palte is also provided with non-display area, and described OLED display panel also comprises:
Drive circuit, be arranged on be positioned at described non-display area described array base palte on, to drive described organic luminous layer emission of light.
Present invention also provides a kind of method preparing OLED display panel, can be used for preparing the OLED display panel as described in above-mentioned any one, and described OLED display panel comprises the organic luminous layer be arranged between the first electrode and the second electrode, described method comprises:
Semi-conductive substrate is provided, and described Semiconductor substrate is provided with viewing area;
Some nano particles are mixed in liquid glue coating;
The liquid glue coating being mixed with described nano particle is coated on the described Semiconductor substrate being positioned at described viewing area;
Described resonant layer is formed after baking process; And
Described in the light therethrough that described organic luminous layer is launched, resonant layer penetrates described OLED display panel, described resonant layer comprises majority first nano particle laid respectively in described first sub-pixel, be arranged in majority second nano particle of described second sub-pixel and be arranged in majority the 3rd nano particle of described 3rd sub-pixel, and described first nano particle, the second nano particle and the 3rd nano particle light of described different-waveband that corresponding described organic luminous layer is launched respectively forms surface plasma resonance.
As a preferred embodiment, above-mentionedly prepare in the method for OLED display panel, described first electrode is transparency electrode, and described method also comprises:
Described organic luminous layer is prepared on described resonant layer and between described second electrode.
As a preferred embodiment, above-mentionedly prepare in the method for OLED display panel:
Described second electrode is transparency electrode, below described resonant layer and between described first electrode, be provided with described organic luminous layer.
Foregoing invention tool has the following advantages or beneficial effect:
OLED display panel in the application and preparation method thereof, by arranging the resonant layer including nano particle in dot structure, to utilize nano particle, surface plasma resonance is produced to the light that dot structure is launched, and then promote the light extraction efficiency of whole display device, and simple for process, be convenient to applying of OLED.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, the present invention and feature, profile and advantage will become more apparent.Mark identical in whole accompanying drawing indicates identical part.Proportionally can not draw accompanying drawing, focus on purport of the present invention is shown.
Fig. 1 is the structural representation of OLED display panel in the embodiment of the present application one;
Fig. 2 is the structural representation of OLED display panel in the embodiment of the present application two;
Fig. 3 is the structural representation of OLED display panel in the embodiment of the present application three;
Fig. 4 is the structural representation of OLED display panel in the embodiment of the present application four;
Fig. 5 is the structural representation of rod-like nanoparticles;
Fig. 6 is the structural representation of spherical nanoparticle;
Fig. 7 is the structural representation of band caryosphere body nano particle;
Fig. 8 is the flow chart preparing OLED display panel method in the embodiment of the present application five.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the present invention is further illustrated, but not as limiting to the invention.
OLED display panel in the application comprises the array base palte being provided with viewing area, and in this viewing area, be provided with several display units (pixel), and in each display unit, all can comprise multiple sub-pixel (sub-pixel), as the first sub-pixel, the second sub-pixel and the 3rd sub-pixel, on the array base palte of viewing area, be namely provided with multiple first sub-pixel (sub-pixel as red-emitting), multiple second sub-pixel (sub-pixel as transmitting green light) and multiple 3rd sub-pixel (as launched the sub-pixel of blue light); The organic luminous layer of emission of light is provided with in each sub-pixel (i.e. each first sub-pixel, each second sub-pixel and each 3rd sub-pixel), and the wave band of the light emitted line of organic luminous layer in dissimilar sub-pixel different (wave band of the light emitted line of organic luminous layer in the wave band of the light emitted line of organic luminous layer in the wave band of the light emitted line of organic luminous layer namely in the first sub-pixel, the second sub-pixel and the 3rd sub-pixel is all not identical each other).
In addition, the resonant layer comprising nano particle is also provided with in each sub-pixel, and this resonant layer of light therethrough injection OLED display panel that above-mentioned organic luminous layer is launched, and the nano particle in the resonant layer of each type sub-pixel all mates (as made can to produce plasma resonance between the wave band of the physical size of nano particle and above-mentioned light with the wave band of the light emitted line of the organic luminous layer of the type sub-pixel, the physical size of the nano particle in the resonant layer of corresponding dissimilar sub-pixel is just distinguished to some extent along with the wave band difference of organic luminous layer emission of light), surface plasma resonance is formed at each sub-pixel with correspondence, increase light generation efficiency, and then promote the light extraction efficiency of OLED display panel.
Below in conjunction with accompanying drawing, (Fig. 1 ~ 4 only to illustrate in OLED display panel a sub-pixel structure in pixel cell, all comparatively approximate due to what illustrate in remaining sub-pixel structure and figure in pixel cell, therefore the following examples are all that basis based on a sub-pixel structure is set forth, but those skilled in the art should know that it should not be construed as the restriction to technical scheme), the technical scheme in the application is described in detail:
Embodiment one
Fig. 1 is the structural representation of OLED display panel in the embodiment of the present application one; As shown in Figure 1, OLED display panel comprises:
Array base palte 1, and this array base palte 1 is provided with viewing area and non-display area, and due to the technical scheme of the application relevant to the OLED in viewing area, therefore the OLED structure (namely follow-up device architecture and corresponding processing step all carry out arranging and operating based on this viewing area) that illustrate only in the drawing of the present application in viewing area, and the structure of non-display area do not illustrated, but those skilled in the art should know that the device architecture in non-display area can carry out adaptive amendment according to the improvement illustrated in the application.
Preferably, in above-mentioned non-display area, drive circuit can be provided with, for driving the sub-pixel emissive light being positioned at viewing area.
Resonant layer 2 is coated with, as long as the organic luminous layer emission of light that it can be corresponding with it can produce surface plasma resonance on above-mentioned array base palte 1.
Further, resonant layer 2 comprises coating layer and is dispersed in the some nano particles (nano-particles) in coating layer, the nano particle being arranged in each sub-pixel set mates with the light emitted line wave band of this sub-pixel, and dissimilar nano particle in the adjacent subpixels with different emission of light wave band is better each other does not mutually mix.Such as, in the sub-pixel of red-emitting (i.e. the first sub-pixel), the coating layer being arranged on the sub-pixel being arranged in red-emitting can be provided with the nano particle (i.e. first nano particle) of material for gold (Au) rod shaped particles 01, as shown in Figure 5, the length-width ratio L:W of this rod shaped particles 01 is between 1.5:1 ~ 2.5:1, in the sub-pixel of transmitting green light (i.e. the second sub-pixel), the coating layer being arranged on the sub-pixel being arranged in transmitting green light can be provided with the nano particle (i.e. the second nano particle) of the spheric granules (participating in structure shown in Fig. 6) 02 that material is golden (Au) or silver-colored (Ag), or also can be provided with the nano particle (i.e. the second nano particle) of band core spherical particles (participating in structure shown in Fig. 8) 03 in the coating layer of the sub-pixel of this transmitting green light, and as shown in Figure 8, the material of the shell 031 of this band core spherical particles (participating in structure shown in Fig. 7) 03 can select gold, the material of kernel 032 then can select silica etc., in the sub-pixel of transmitting green light (i.e. the 3rd sub-pixel), be arranged on the sub-pixel coating layer being arranged in transmitting green light and can be provided with the spheric granules (its planform can be participated in shown in Fig. 6) that material is gold (Au) or silver or silver alloy etc.
Preferably, the nano particle of same type is only provided with in each sub-pixel, to keep away the defects such as the light of the above-mentioned plasma resonance of generation or even the generation of absorption organic luminous layer), and the wave band that all can send organic luminous layer in this sub-pixel due to nanoparticle types set in each sub-pixel produces surface plasma effect, so the nano particle be distributed in embodiments of the present invention in coating layer is not limited only to monolayer distribution, and can be the arranged evenly of single or multiple lift.In detail, the nano particle supposing to be arranged in sub-pixel also includes the particle wave band of the light emitted line of the organic luminous layer of this sub-pixel not being produced to plasma resonance, following shortcoming may be had: the light of the default wave band that (1) is sent by sub-pixel organic luminous layer runs into the nano particle not producing surface plasma resonance and can be absorbed, and luminous efficiency is reduced; (2) when nano particle is not monolayer distribution in coating layer, after the light of the default wave band sent for sub-pixel organic luminous layer produces surface plasma resonance, still going out the nano particle of light path being encountered other types and being absorbed, luminous efficiency may be reduce further; (3) in order to avoid above-mentioned (2) disappearance and the nano particle in coating layer is defined as individual layer, add nano particle distribution difficulty, reduce the coating yield of resonant layer 2.The embodiment of the present invention can effectively solve the problem, and increases the luminous efficiency of OLED element and overall light extraction efficiency.And, in order to increase the coating yield of resonant layer further, adjacent two dissimilar nano particles launching the sub-pixel of Different lightwave section also can mix in adjacent area part, and preferably nano particle Mixed Zone is not overlapped with organic luminous layer.In sum, technical solution of the present invention can be only a kind of corresponding surface plasma resonance nano particle respectively in each sub-pixel sending Different lightwave section, or comprises most surface plasma resonance nano particle corresponding with this sub-pixel for emitting light wave band.And the plasma resonance produced to promote nano particle can by the size Control of nano particle between 5 ~ 30nm, the diameter R2 of the housing 031 of the length L of rod shaped particles, the diameter R1 of spheric granules and band core spherical particles all can be 5 ~ 30nm.
Preferably, the material of above-mentioned coating layer can be the materials such as siloxane-based organic material or siloxane-based organo metallic material.
Further, as shown in Figure 1, dielectric layer is provided with on above-mentioned resonant layer 2, and embedding is provided with TFT device in this dielectric layer, for driven element pixel light emission, namely according to being sequentially disposed with gate insulator 3, insulating barrier 4 and flatness layer 5 on resonant layer from bottom to up, and above-mentioned TFT device is arranged in the film layer structure between flatness layer 5 and resonant layer 2.
Further, be coated with pixel defining layer 7 at the upper surface of above-mentioned flatness layer 5, and anode layer (i.e. the first electrode) 6 runs through the upper surface that this pixel defining layer 7 covers part flatness layer 5, and be connected with above-mentioned TFT device by syndeton; The upper surface of segment anode layer 6 is also exposed by above-mentioned pixel defining layer 7.
Further, according to being sequentially also disposed with hole transmission layer 8, organic luminous layer 13, electron transfer layer 9 and cathode layer 10 from bottom to up on above-mentioned anode layer 6 and pixel defining layer 7, shown module to form OLED with above-mentioned anode layer 6; Protective layer 11 is positioned on above-mentioned cathode layer (the second electrode) 10, and above-mentioned structure is all covered between array base palte 1 by base plate for packaging 12, and then forms OLED display panel structure.
As shown in Figure 1, the position of pixel defining layer 8 corresponding sub-pixel is formed with groove, namely the bottom of this groove is the upper surface (i.e. the upper surface of flatness layer 5) of above-mentioned dielectric layer, anode layer 6 is then positioned at the upper surface of the top covering flatness layer 5 of above-mentioned groove, and be connected with TFT device by the through hole running through flatness layer 5, organic luminous layer 13 then can be positioned at above the first electrode of groove, and the first electrode is transparency electrode and the second electrode is reflecting electrode in the present embodiment, the light launched to make this organic luminous layer 13 penetrates OLED display panel through the bottom of groove through resonant layer 2.
Preferably, between hole transmission layer 8 and anode layer 6, also can hole injection layer be set in above-mentioned OLED display panel, and electron injecting layer also can be set between electron transfer layer 9 and cathode layer 10, specifically can set according to actual process demand.
Preferably, owing to only illustrating the structural representation of a sub-pixel in Fig. 1, and those skilled in the art should know in a rgb pixel unit and can comprise three sub-pixel structures as shown in fig. 1, its difference is mainly that organic luminous layer 13 material is different, to launch the light of different-waveband, accordingly, nano particle in resonant layer 2 also can have different physical sizes according to the difference of organic luminous layer 13 emission of light, plasma resonance is produced with the light making the organic luminous layer 13 that this nano particle can be corresponding with it launch, and in order to ensure light extraction efficiency, physical size and the material of the nano particle in same sub-pixel structure in (in the structure namely shown in Fig. 1) resonant layer 2 are identical or approximate, optimum is all identical.
Embodiment two
Fig. 2 is the structural representation of OLED display panel in the embodiment of the present application two, as shown in Figure 2, based on the basis of above-described embodiment one and accompanying drawing 1, in OLED display panel structure in the present embodiment and embodiment one, OLED display panel structure is comparatively approximate, its difference is that the setting position of resonant layer 2 is different, in the present embodiment, resonant layer 2 is arranged between anode layer 6 and hole transmission layer 8, and this resonant layer 2 also optionally covers the upper surface of pixel defining layer 8, and many technical characteristics such as the physical size of the nano particle comprised in resonant layer 2 in the present embodiment and material all can approximate or identical with above-described embodiment one, film layer structures identical or approximate in addition etc. also will not tire out at this to be stated, the light that same organic luminous layer 13 is launched passes after resonant layer 2 produces surface plasma resonance, OLED display panel is penetrated by bottom array base palte 1.
Preferably, because the resonant layer 2 in embodiment one is arranged between array base palte 1 and dielectric layer, it can play the effect of resilient coating, and owing to resonant layer 2 moving on anode layer 6 in the present embodiment, therefore need to arrange resilient coating 14 between array base palte 1 and dielectric layer.
To sum up, as long as the path that above-mentioned resonant layer 2 is arranged on the outgoing of OLED display panel light can realize plasma resonance, OLED display panel described above is bottom emission device (namely anode layer 6 is transparency electrode), and resonant layer 2 can be arranged on the below of organic luminous layer 13, if and above-mentioned OLED display panel is top emission device (namely cathode layer 10 is transparency electrode), and resonant layer 2 can be arranged on the top of organic luminous layer 13; OLED display panel in above-described embodiment one and embodiment two is bottom emission device (namely anode layer 6 is transparency electrode), can plasma resonance be realized so be arranged between array base palte 1 and the dielectric layer being provided with TFT device or between anode layer 6 and organic luminous layer 13 by resonant layer 2, and then promote the light extraction efficiency of OLED display panel; And in order to comparatively comprehensively introduce the technical scheme of the application, set forth for the OLED display panel structure for top emission device below:
Fig. 3 is the structural representation of OLED display panel in the embodiment of the present application three, and Fig. 4 is the structural representation of OLED display panel in the embodiment of the present application four; As Fig. 3 ~ 4 are known, the OLED display panel in embodiment three and embodiment four is top emission device (namely cathode layer 10 is transparency electrode), and resonant layer 2 can be arranged on the top of organic luminous layer 13.
Further; on basis based on embodiment two; as shown in Figure 3; resonant layer 2 is arranged on cathode layer 10 and protective layer (now protective layer used in the taking-up of light; also can be described as light removing layer) between 11, and the light therethrough cathode layer 10 that organic luminous layer 13 is launched penetrates OLED display panel after producing plasma resonance via resonant layer 2.
Same; based on the basis of embodiment two; as shown in Figure 4; resonant layer 2 is arranged on protective layer (now protective layer used in the taking-up of light; also can be described as light removing layer) between 11 and base plate for packaging 12, and the light that organic luminous layer 13 is launched penetrates OLED display panel after producing plasma resonance through cathode layer 10 via resonant layer 2 equally.
Embodiment five
Fig. 8 is the flow chart preparing OLED display panel method in the embodiment of the present application five, as shown in Figure 8, provide one in the present embodiment and prepare OLED display panel method, can apply and prepare OLED display panel described in above-described embodiment one to five, and OLED display panel comprises the organic luminous layer be arranged between the first electrode and the second electrode, above-mentioned method can comprise:
First, the Semiconductor substrate that one is provided with viewing area and non-display area is provided, and in Semiconductor substrate, many device architectures can be set, be positioned at all device architectures below resonant layer as comprised in embodiment one to four, namely this Semiconductor substrate can comprise identical or different film layer structure according to the device of the different or concrete different structure of the device of preparation.
Secondly, in liquid glue coating, being mixed into some nano particles, (there is not dividing of sequencing in this step and the above-mentioned step of Semiconductor substrate that provides, can also can successively prepare simultaneously, it does not all affect final technique effect), the material of this liquid coating layer (overcoatlayer) can be siloxane-based (siloxanebased) organic material, siloxane-based (siloxanebased) organo metallic material etc.
Afterwards, the liquid glue coating being mixed with above-mentioned nano particle is coated on the Semiconductor substrate being positioned at viewing area; Concrete can adding in colloidal solution according to dissimilar nano particle (nano particle etc. of the geomery as shown in Fig. 5 ~ 7) mixes, and nano particle corresponding to (FineMetalMask is called for short FMM) the high-precision metal mask of follow-up OLED evaporation program defining pixel (pixel) organic luminous layer (EML) position can be used respectively to adopt technique such as spraying (spraycoating) or contact print (contactprinting) etc. above-mentioned liquid glue coating to be applied to corresponding position.
Finally, baking (baking) technique can be utilized to remove liquid glue (solvent), to form above-mentioned resonant layer.
Preferably, after forming above-mentioned resonant layer, if the OLED display panel of preparation is bottom emission device, then need on resonant layer, prepare organic luminous layer and cathode layer (i.e. the second electrode) successively, and the Semiconductor substrate be arranged in below resonant layer is formed with transparent anode layer (i.e. the first electrode).
Preferably, after forming above-mentioned resonant layer, if the OLED display panel of preparation is bottom emission device, then need on resonant layer, prepare organic luminous layer and cathode layer (i.e. the second electrode) successively, and the Semiconductor substrate be arranged in below resonant layer is formed with transparent anode layer (i.e. the first electrode).
Preferably, if the OLED display panel of preparation is top emission device, the Semiconductor substrate be then arranged in below resonant layer is formed with anode layer and is positioned at the organic luminous layer on anode layer (i.e. the first electrode), and transparent cathode layer (i.e. the second electrode) can be positioned at below resonant layer or after preparing resonant layer, continue the preparation technology of transparent cathode.
Method prepared by the OLED display panel in the present embodiment, can be used for preparing OLED display panel structure described in above-described embodiment one to four, therefore the correlation technique feature such as the film layer structure recorded in above-described embodiment one to four and position relationship, material and size is all applicable in the method for the present embodiment, technical characteristic described in corresponding the present embodiment is also all applicable in the structure of the OLED display panel in above-described embodiment one to four described in any one embodiment.
In sum, OLED display panel that the application records and preparation method thereof, by all arranging the resonant layer including nano particle in each sub-pixel, and the light utilizing nano particle to be launched by the organic luminous layer of sub-pixel produces plasma resonance, and then effectively can improve the light extraction efficiency of OLED display panel; Simultaneously, the physical size of the nano particle mated with it according to the band setting of its light in each sub-pixel, and the nano particle in each sub-pixel is corresponding types, can not adverse influence be produced to the light in this sub-pixel, and then light extraction efficiency can be promoted further.
It should be appreciated by those skilled in the art that those skilled in the art can realize described change case in conjunction with prior art and above-described embodiment, do not repeat them here.Such change case does not affect flesh and blood of the present invention, does not repeat them here.
Above preferred embodiment of the present invention is described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, the equipment wherein do not described in detail to the greatest extent and structure are construed as to be implemented with the common mode in this area; Any those of ordinary skill in the art, do not departing under technical solution of the present invention ambit, the Method and Technology content of above-mentioned announcement all can be utilized to make many possible variations and modification to technical solution of the present invention, or being revised as the Equivalent embodiments of equivalent variations, this does not affect flesh and blood of the present invention.Therefore, every content not departing from technical solution of the present invention, according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belongs in the scope of technical solution of the present invention protection.
Claims (20)
1. an OLED display panel, is characterized in that, comprising:
Array base palte, is provided with viewing area, and described viewing area is provided with multiple first sub-pixel, multiple second sub-pixel and multiple 3rd sub-pixel;
Organic luminous layer, be arranged on be arranged in described viewing area described array base palte on described multiple first sub-pixels, multiple second sub-pixel and multiple 3rd sub-pixel, described organic luminous layer sends the light of different-waveband respectively at described first sub-pixel, the second sub-pixel and the 3rd sub-pixel; And
Resonant layer, be arranged on be arranged in described viewing area described array base palte on described multiple first sub-pixels, multiple second sub-pixel and multiple 3rd sub-pixel, and described organic luminous layer launch light therethrough described in resonant layer penetrate described OLED display panel; Wherein
Described resonant layer comprises majority first nano particle laid respectively in described first sub-pixel, be arranged in majority second nano particle of described second sub-pixel and be arranged in majority the 3rd nano particle of described 3rd sub-pixel, and described first nano particle, described second nano particle and the described 3rd nano particle light of described different-waveband that corresponding described organic luminous layer is launched respectively forms surface plasma resonance.
2. OLED display panel as claimed in claim 1, it is characterized in that, described resonant layer comprises at least one coating layer, and described first nano particle, described second nano particle and described 3rd nano particle mutually do not mix in described coating layer.
3. OLED display panel as claimed in claim 2, it is characterized in that, the material of described coating layer is siloxane-based organic material or siloxane-based organo metallic material.
4. OLED display panel as claimed in claim 2, it is characterized in that, described first nano particle, described second nano particle and described 3rd nano particle all have at least double-layer separate to be distributed in described coating layer.
5. OLED display panel as claimed in claim 1, it is characterized in that, the wave band of the light that the physical parameter of described first nano particle, the second nano particle and the 3rd nano particle is launched with the described organic luminous layer in described first sub-pixel, the second sub-pixel and the 3rd sub-pixel respectively mates, and forms described surface plasma resonance with the light launched with described organic luminous layer respectively.
6. OLED display panel as claimed in claim 5, it is characterized in that, the light that described organic luminous layer is launched in described first sub-pixel is ruddiness, and described first nano particle is material be gold rod shaped particles, the length-width ratio of described rod shaped particles is 1.5:1 ~ 2.5:1.
7. OLED display panel as claimed in claim 5, it is characterized in that, the light that described organic luminous layer is launched in described second sub-pixel is green glow, and described second nano particle is material is gold or silver-colored spheric granules; Or,
Described second nano particle is band caryosphere body, and the enclosure material of described band caryosphere body is gold, and the kernel material of described band caryosphere body is silica.
8. OLED display panel as claimed in claim 5, it is characterized in that, the light that described organic luminous layer is launched in described 3rd sub-pixel is blue light, and described 3rd nano particle is material is the spheric granules of gold or silver or silver alloy.
9. OLED display panel as claimed in claim 5, it is characterized in that, described nano particle is of a size of 5 ~ 30nm.
10. OLED display panel as claimed in claim 1, is characterized in that, also comprise:
Dielectric layer, is arranged on described array base palte, and in described dielectric layer, embedding is provided with TFT device;
Pixel defining layer, covers the upper surface of described dielectric layer, and the position in described pixel defining layer corresponding described first sub-pixel, described second sub-pixel and described 3rd sub-pixel forms groove respectively;
First electrode, is positioned at the described bottom portion of groove of described dielectric layer upper surface, and is connected via the through hole being positioned at dielectric layer with described TFT device;
Hole transmission layer, is arranged on described first electrode, and is positioned under described organic luminous layer;
Electron transfer layer, is arranged on described organic luminous layer;
Second electrode, is arranged on described electron transfer layer and described pixel defining layer; And
Base plate for packaging, is arranged on described second electrode.
11. OLED display panel as claimed in claim 10, it is characterized in that, described first electrode is transparency electrode,
Described resonant layer is between the upper surface and described dielectric layer of described array base palte; Or
Described resonant layer is between the upper surface and described hole transmission layer of described first electrode.
12. OLED display panel as claimed in claim 11, it is characterized in that, when described resonant layer is between the upper surface and described hole transmission layer of described first electrode, described resonant layer is arranged in the groove of described pixel defining layer, described hole transmission layer covers the upper surface of described resonant layer, and described OLED display panel also comprises:
Resilient coating, is arranged between described array base palte and described dielectric layer;
Electron injecting layer, is arranged between described electron transfer layer and described second electrode;
Light removing layer, is arranged between described base plate for packaging and described second electrode.
13. OLED display panel as claimed in claim 10, it is characterized in that, described second electrode is transparency electrode, and described resonant layer covers the upper surface of described second electrode.
14. OLED display panel as claimed in claim 10, it is characterized in that, described first electrode is transparency electrode, and described OLED display panel also comprises:
Light removing layer, covers the upper surface of described second electrode; Wherein
Described resonant layer is between described smooth removing layer and described base plate for packaging.
15. OLED display panel as claimed in claim 10, it is characterized in that, described dielectric layer comprises gate insulator stacked successively, insulating barrier and flatness layer.
16. OLED display panel as claimed in claim 10, it is characterized in that, described first electrode is anode, and described second electrode is negative electrode.
17. OLED display panel as claimed in claim 1, it is characterized in that, described array base palte is also provided with non-display area, and described OLED display panel also comprises:
Drive circuit, be arranged on be positioned at described non-display area described array base palte on, to drive described organic luminous layer emission of light.
18. 1 kinds of methods preparing OLED display panel, it is characterized in that, for the preparation of as the OLED display panel in claim 1 ~ 17 as described in any one, and described OLED display panel comprises the organic luminous layer be arranged between the first electrode and the second electrode, and described method comprises:
Semi-conductive substrate is provided, and described Semiconductor substrate is provided with viewing area;
Some nano particles are mixed in liquid glue coating;
The liquid glue coating being mixed with described nano particle is coated on the described Semiconductor substrate being positioned at described viewing area;
Described resonant layer is formed after baking process; And
Described in the light therethrough that described organic luminous layer is launched, resonant layer penetrates described OLED display panel, described resonant layer comprises majority first nano particle laid respectively in described first sub-pixel, be arranged in majority second nano particle of described second sub-pixel and be arranged in majority the 3rd nano particle of described 3rd sub-pixel, and described first nano particle, the second nano particle and the 3rd nano particle light of described different-waveband that corresponding described organic luminous layer is launched respectively forms surface plasma resonance.
19. methods preparing OLED display panel as claimed in claim 18, it is characterized in that, described first electrode is transparency electrode, and described method also comprises:
Described organic luminous layer is prepared on described resonant layer and between described second electrode.
20. methods preparing OLED display panel as claimed in claim 18, it is characterized in that, described second electrode is transparency electrode,
Described organic luminous layer is being provided with below described resonant layer and between described first electrode.
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