CN105810834A - Organic electroluminescent device - Google Patents
Organic electroluminescent device Download PDFInfo
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- CN105810834A CN105810834A CN201410838217.XA CN201410838217A CN105810834A CN 105810834 A CN105810834 A CN 105810834A CN 201410838217 A CN201410838217 A CN 201410838217A CN 105810834 A CN105810834 A CN 105810834A
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Abstract
The invention discloses an organic electroluminescent device, comprising a substrate and an organic electroluminescent unit arranged on the substrate, wherein the organic electroluminescent unit comprises a first electrode layer, an organic functional layer and a second electrode layer stacked in sequence, and the first electrode layer is arranged close to the substrate; the organic electroluminescent device further comprises a light extraction layer arranged between the substrate and the second electrode layer, a plurality of different interface regions for changing the flatness of a second electrode reflecting interface are formed in the light extraction layer, and the different interface regions occupy 0.1-30% of the area of the light extraction layer. The device has high definition while keeping mirror reflection.
Description
Technical field
The present invention relates to field of organic electroluminescence, be specifically related to high organic of a kind of smooth extraction efficiency
Electroluminescent device.
Background technology
Through the development of nearly 30 years, (English full name was Organic Light to organic electroluminescence device
Emitting Device, referred to as OLED) as illumination of future generation and Display Technique, have colour gamut width,
The advantages such as response is fast, wide viewing angle, pollution-free, high-contrast, planarization, in illumination and aobvious
Show and obtain a certain degree of application.Typical organic electroluminescence device generally comprise transparency carrier 1,
First transparency electrode the 3, second electrode 5 and be arranged on two interelectrode organic function layers 4.
Generally the negative electrode of end illuminating OLED is planar metal, has good reflecting effect.This reflecting surface can
Application, such as vanity mirror etc. are obtained multi-field.
Due to the application of phosphor material, its internal quantum efficiency has nearly reached the ultimate value 100% of theory,
But its external quantum efficiency only about 20%, the principal element that restriction external quantum efficiency improves further
It it is the light extraction efficiency of device.In order to improve the light outgoing efficiency of OLED screen body, it will usually at screen body
Interior design light takes out structure.Such as internal scattering layer, low-light grid or the scattering film of outside, thoroughly
Mirror film etc..Above-mentioned design all can cause the serious diffuse-reflectance of screen surface, thus destroys the mirror of screen body
Face effect.
CN103700783A discloses a kind of light taken out for Organic Light Emitting Diode (OLED) light
Grid structure, is provided with the alternately arranged structure of high low-index material between glass substrate and transparent anode
The lattice structure become, the cross section of refraction materials is closed figure, wherein relative with glass substrate
Limit a be parallel to the limit b that contacts with glass substrate, and 0≤a≤b (b ≠ 0)；Described high index of refraction material
The refractive index of material is not less than 1.8, and the refractive index of described low-index material is not more than 1.5.This patent
Application is to add refractive index height optical grating construction alternately between glass substrate and OLED anode to take
Go out the light of waveguide mode, use high-index material to contact minimizing total reflection with substrate, thus improve
OLED or the efficiency of screen body.But the program is also primarily based upon by grid, reduces total reflection
Scheme, grid solid matter, destroys screen body mirror effect.And need special refractive index selection, raw material
Select restricted.
Generally light removing layer uses the optical textures such as scattering or grating, by changing luminous direction,
By the light extraction of device inside out.Such as in CN03147098.X, carry by adding scattering particles
High light takes out；Light taking-up is improved by changing surface topography for another KR20110035792；Also have
Nature photonics | VOL 2 | is in AUGUST 2008, and author proposes to use low refraction grid
Improve light to take out.It is all from changing light emission direction because above-mentioned, the light of total reflection originally is carried
Take out.But the change of light emission direction means to shield the loss of surface mirror effect.
In oled light reflection process, its loss includes reflective electrode surface plasmon modes, ITO
With glass surface total reflection, glass and Air Interface total reflection etc..OLED light loss pattern bag
Include surface plasmon modes, the total reflection of ITO/Glass interface and substrate/air surface and be totally reflected three kinds,
Being specifically shown in light loss schematic diagram described in Fig. 8, wherein a represents the total reflection of ITO/Glass interface, b generation
Table surface plasmon modes light loss, c represents substrate/air surface total reflection.Above-mentioned two parts of patents
Document is to solve ITO/Glass interface loss and substrate/air surface loses two kinds, for surface etc.
Ion mode loss research is less.
CN200410008012 discloses a kind of organic electroluminescent (EL) display device assembly and includes lining
The end, organic EL portion, light loss prevent layer and microgap layer.Organic EL portion comprises the first electrode
Layer, organic luminous layer and the second electrode lay, these layers are the most patterned and stack on the upper surface of the substrate.
Light loss prevents layer for improving light injection efficiency.Described light removing layer use gas to fill or
Evacuated microgap layer, its multiple projections being respectively provided with preset space length and predetermined altitude are constituted
Diffraction grating, the figure Interval Distance of diffraction grating is 200nm-2000nm, and height is 50-5000nm,
Each projection can be different shape, such as cylinder or polygonal pyramid body.The light that the program is also
Road variation diagram is shown in Fig. 9, and its goal of the invention is set out based on reducing total reflection, and Structure of need is densely arranged.
And refractive index has particular/special requirement, need to use height refractive index alternately, need to select respectively
High index of refraction material and low-refraction material, have particular/special requirement to selection.
Summary of the invention
It is existing Bright View body owing to surface plasma light loss is led to this end, to be solved by this invention
The problem causing display effect difference, it is provided that a kind of organic electroluminescence device, by being arranged on microcylinder
Light removing layer structure or the mode of micropore is set on light removing layer makes the surface plasma light of device
It is fully extracted out, not only improves light extraction efficiency, additionally it is possible to while keeping direct reflection,
There is higher definition.
For solving above-mentioned technical problem, the technical solution used in the present invention is as follows:
A kind of organic electroluminescence device, including substrate, the organic electroluminescent that is arranged on substrate
Unit, described organic electroluminescence cell includes stacking gradually the first electrode layer of setting, You Jigong
Ergosphere and the second electrode lay, described first electrode layer is arranged near described substrate；Described organic electroluminescence
Luminescent device also includes the light removing layer being arranged between described substrate and the second electrode lay, described light
Removing layer is provided with to change some not homogeneity boundary zones of the second electrode reflecting interface planarization
Territory, described not homogeneity interface zone accounts for the 0.1-30% of described smooth removing layer area.
Described smooth removing layer is the microcylinder light removing layer that some microcylinders are constituted, adjacent described microtrabeculae
Be white space between body, described microcylinder constitute described in not homogeneity interface zone.
If described smooth removing layer includes that light takes out bulk material and setting in light takes out bulk material
Dry micropore, described micropore constitute described in not homogeneity interface zone.
Preferably, described not homogeneity interface zone accounts for the 0.1-20% of described smooth removing layer area, it is preferable that
0.5-10%, most preferably 0.5-5%.
Described microcylinder or micropore are through described light removing layer, in described microcylinder or micropore
Heart line is perpendicular to described substrate.
The cross section of described microcylinder or micropore is regular shape and/or irregularly shaped.
Beeline 0 < d≤100 μm between adjacent described microcylinder or micropore.
The thickness of described smooth removing layer is 1-10000nm, preferably 10-3000nm.
Described organic luminous layer includes hole injection layer, hole transmission layer, luminescent layer, electric transmission
One layer or a combination thereof in layer and electron injecting layer；
Described smooth removing layer is arranged on described substrate, the first electrode, hole injection layer, hole transport
The two-layer of arbitrary neighborhood in layer, luminescent layer, electron transfer layer, electron injecting layer and the second electrode lay
Between.
The technique scheme of the present invention has the advantage that compared to existing technology
The present inventor, through substantial amounts of research, creatively seeks to solving surface plasma
The scheme of mode light loss, i.e. daylighting removing layer use microcylinder structure or arrange on light removing layer
Micropore constitutes not homogeneity interface zone, and described microcylinder or the area of micropore account for light-emitting area
0.1-30%, preferably 0.1-20%, be further preferably 0.5-10%, most preferably 0.5-5%.This be by
Propagating along reflective electrode surface in surface plasmon modes light, lateral transport distance is big, only need to be
Reflecting electrode flatness is broken, it is possible to obtain preferable light and take out effect in larger space.Therefore set
The microcylinder of the composition put not homogeneity interface zone or the area accounting of micropore are considerably less, optimum accounting
Scope is 0.5-5%, and the single human eye that is smaller in size than uses the minimum resolution size of distance, institute accordingly
Enter the light of screen body with the external world, major part reflects away with direct reflection form, preferably keeps
The mirror effect of luminescent screen body.This directly improves the intensive of total reflection light outgoing with background technology
Scattering layer or grid micro structure are different.A large amount of test experiments checkings show, use and take out containing this light
The device of layer, its light extraction efficiency can improve more than 20%, and light-emitting area keeps OLED luminous
Mirror effect, improves the purpose of light extraction efficiency simultaneously.
Additionally, the material of the light removing layer of the present invention and refractive index etc. are all without particular/special requirement, it is not necessary to
Special high refraction or the material of low refraction material, thus selection is more extensive.
The organic electroluminescence device of the present invention retain screen body mirror effect on the premise of, have
Higher light extraction efficiency, has a wide range of applications, and such as display screen body, vanity mirror, needs spy
The different automobile tail light of metal-like, OLED screen splicing ornament lamp etc..
Accompanying drawing explanation
In order to make present disclosure be more likely to be clearly understood, concrete below according to the present invention
Embodiment also combines accompanying drawing, and the present invention is further detailed explanation, wherein:
Fig. 1 is the structural representation of organic electroluminescence device of the present invention；
Fig. 2 is the structural representation of second embodiment of the invention；
Fig. 3 is the structural representation of third embodiment of the invention；
Fig. 4 is the cross-sectional view of microcylinder；
Fig. 5 is the cross-sectional view of another embodiment of microcylinder；
Fig. 6 is the light removing layer cross-sectional view being provided with micropore；
Fig. 7 is the structural representation of the hexagonal arrangement of microcylinder；
Fig. 8 is that oled light loses pattern diagram；
Fig. 9 is prior art light path schematic diagram；
In figure, reference is expressed as: 1-substrate, 2-the first electrode layer, 3-microcylinder light removing layer,
4-organic function layer, 5-the second electrode lay, 6-microcylinder, 41-the first functional layer, 42-the second function
Layer.
Detailed description of the invention
In order to make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing
Embodiments of the present invention are described in further detail.
The present invention can be embodied in many different forms, and should not be construed as limited to explain at this
The embodiment stated.On the contrary, it is provided that these embodiments so that the disclosure will be thorough and complete,
And the design of the present invention will be fully conveyed to those skilled in the art, the present invention will be only by right
Require to limit.In the accompanying drawings, for clarity, can exaggerate layer with the size in region with relative
Size.It should be appreciated that when element such as layer, region or substrate be referred to as " being formed at " or
" be arranged on " another element " on " time, this element can be arranged directly on another element described,
Or intermediary element can also be there is.On the contrary, it is referred to as " being formed directly into " or " straight when element
Connect and be arranged on " on another element time, there is not intermediary element.
As shown in figs 1 to 6, a kind of organic electroluminescence device of the present invention, including substrate 1, set
Putting organic electroluminescence cell on substrate 1, described organic electroluminescence cell includes heap successively
Folded the first electrode layer 2 (anode layer), organic function layer 4 and the second electrode lay 5 (negative electrode arranged
Layer), described first electrode layer is arranged near described substrate；Described organic electroluminescence device also includes
It is arranged on the light removing layer between described substrate 1 and the second electrode lay 5, described smooth removing layer sets
Be equipped with to change some not homogeneity interface zones of the second electrode reflecting interface planarization, described not
Homogeneity interface zone accounts for described smooth removing layer area 0.1-30%, preferably 0.1-20%, further preferably
To 0.5-10%, most preferably 0.5-5%.The position of described smooth removing layer is not particularly limited, permissible
It is arranged between any two-layer between substrate and the second electrode, as it is shown in figure 1, described light takes out
Layer is arranged between substrate 1 and the first electrode layer 2；Shown in Fig. 2, described smooth removing layer is arranged on
Between organic function layer 4 and the first electrode layer 2.Described organic function layer include hole injection layer,
Hole transmission layer, luminescent layer, electron injecting layer and electron transfer layer；Described microcylinder light removing layer 3
It is arranged between the interface of above-mentioned any two-layer.Shown in Fig. 3, described smooth removing layer is arranged on first
Between organic function layer 41 and the second organic function layer 42, described first functional layer 41 and the second merit
Ergosphere 42 is respectively at least hole injection layer, hole transmission layer, luminescent layer, electron injecting layer and electricity
One in sub-transport layer, the first functional layer 41 and the second functional layer 42 are combined as an organic functions
Layer, as the first functional layer 41 includes hole injection layer, hole transmission layer, then the second functional layer 42
Including luminescent layer, electron injecting layer and electron transfer layer；As the first functional layer 41 includes that hole is injected
Layer, hole transmission layer and luminescent layer, then the second functional layer 42 includes electron injecting layer and electric transmission
Layer, this combination can also have multiple mapping mode, again repeat no more.The thickness of described smooth removing layer
Degree is 1-10000nm, preferably 10-3000nm.
As shown in Figure 4 and Figure 5, described smooth removing layer is the microcylinder light that some microcylinders 6 are constituted
Removing layer 3, is white space between adjacent described microcylinder 6, described microcylinder 6 constitute described in not
Homogeneity interface zone.The shape of cross section of microcylinder does not specially require, and can be any rule shape
Shape or irregularly shaped, or regular shape and erose combination.When microcylinder 6 is Fig. 6
During shown cylinder, radius r≤50 μm of described institute cylinder, adjacent described microcylinder 6 center
Spacing d≤100 μm between line.When microcylinder 6 cross section is the triangle shown in Fig. 5,
R≤50 μm of the circumscribed radius of triangle, beeline d≤100 μ of adjacent described triangle
m.The cross-sectional area of described microcylinder 6 is the 0.1-30% of light removing layer Integral luminous area, excellent
Select 0.5-10%, most preferably 0.5-5%.The material that described microcylinder 6 can be selected is not particularly limited,
Can be any transparent and easy patterned conductive material or insulant.Microcylinder structural area accounts for
Ratio is the least, then need not consider electric conductivity and the light transmittance etc. of material too much, may be disposed at substrate and
Between any adjacent two layers between the second electrode lay.As another embodiment, such as Fig. 6 institute
Show, if described smooth removing layer includes that light takes out bulk material and setting in light takes out bulk material
Dry micropore 7, described micropore 7 constitute described in not homogeneity interface zone.Micropore 7 is through described light
Removing layer, its centrage is perpendicular to described substrate 1.Light removing layer arrange position can also at substrate and
Between the two-layer of the arbitrary neighborhood between the second electrode.Light removing layer arranges microcellular structure, by
Relatively big in the interface of material own, as being arranged on ITO and glass surface, then select light transmittance higher
Material；As being arranged on ITO and organic layer interface, then select the transparent material with certain electric conductivity.
As being positioned at organic material interface, then select the material having corresponding transmittability preferable.
The organic electroluminescence device of the present invention in preparation process, the first electrode layer 1, organic functions
The preparation of layer 4 and the second electrode lay 5 is this area routine techniques, takes out at deposition microcylinder light
During layer, can be by using mask plate deposition microcylinder.If arranging micropore on light removing layer, it is
First deposition light removing layer, forms micropore 7 by etching mode the most again.
As other embodiments of the present invention, microcylinder light removing layer 3 can be multilamellar.
For verifying the technique effect of the present invention, inventor devises following comparative example and embodiment:
To have etched the ITO electro-conductive glass substrate of special pattern as substrate in experiment, substrate is placed on
Ultrasonic waves for cleaning in deionized water containing cleanout fluid, wash temperature is about 60 DEG C, then uses infrared baking lamp
The substrate cleaned is dried, puts in evaporation chamber and be deposited with organic layer, electron injecting layer and electricity successively
During pole Al. evaporation, chamber pressure is less than 5.0 × 10-3Wherein first organic layer is deposited with 80nm thickness
N,N’-bis-(1-naphthyl)-N,N’-diphenyl-1,1’-biphenyl-4,4’-diamine
(NPB) as hole transmission layer, tris (8-hydroxyquinolato) aluminum that 30nm is thick
(Alq3) doping mass percent be the green glow dyestuff C545T of 2% as luminescent layer, after be deposited with 30nm
Thickness A lq3As electron transfer layer.
Wherein the device architecture of comparative example is:
Glass/ITO/NPB(80nm)/Alq3: 2%C545T (30nm)/Alq3(30nm)/
LiF(1nm)/Al(150nm)
Each film layer preparation technology of embodiment 1-3 as above, is simply prepared with organic layer interface at ITO
Microtrabeculae shape structure sheaf.This microtrabeculae shape structure sheaf uses coating transparent optical photoresist, the side expose, developed
Prepared by formula.Cylindricality is ranks arrangements, and thickness is 50nm.
The smooth removing layer of embodiment 1 is arranged between ITO and organic function layer NPB, microcylinder 6
Cross section is triangle, and the cross-sectional area of all microcylinders 6 is the 3% of light removing layer entire area,
Distance d between adjacent microcylinder is 100 μm.
The device architecture of embodiment 1 is:
Glass/ITO/ triangle cylindricality removing layer (50nm)/NPB (80nm)/Alq3: 2%
C545T(30nm)/Alq3(30nm)/LiF(1nm)/Al(150nm)
Embodiment 2: light removing layer is arranged between ITO and NPB, the cross section of microcylinder 6 is
Hexagon, the cross-sectional area of all microcylinders 6 is the 3% of light removing layer entire area, adjacent microtrabeculae
Distance d between body is 100 μm.
The device architecture of embodiment 2 is:
Glass/ITO/ hexagonal cylindricality removing layer (50nm)/NPB (80nm)/Alq3: 2%
C545T(30nm)/Alq3(30nm)/LiF(1nm)/Al(150nm)
Embodiment 3: light removing layer is arranged between ITO and NPB, the cross section of micropore 7 is circle
Shape, the cross-sectional area of all micropores 7 is the 3% of light removing layer entire area, between adjacent cells 7
Distance d be 100 μm.
The device architecture of embodiment 3 is:
Glass/ITO/ cylinder removing layer (50nm)/NPB (80nm)/Alq3: 2%
C545T(30nm)/Alq3(30nm)/LiF(1nm)/Al(150nm)。
Table 1 comparative example and embodiment 1-3 the performance test results
Test result shows, after the employing microcylinder light removing layer of the device of the present invention, light extraction is imitated
Rate at least can improve more than 21%, embodiment 2 even as high as 25.%.This light-extraction layer of visible employing,
Device efficiency obtains and is obviously improved.
Each film layer preparation technology of embodiment 4-7 as above, is in ITO and glass substrate interface system
Standby microtrabeculae shape structure sheaf.This microtrabeculae shape structure sheaf uses coating transparent optical photoresist, exposes, develops
Prepared by mode.
The device architecture of embodiment 4 is:
Glass/ cylinder removing layer (100nm)/ITO/NPB (80nm)/Alq3: 2%
C545T(30nm)/Alq3(30nm)/LiF(1nm)/Al(150nm)
Wherein microcylinder is cylinder, and described microcylinder uses the hexagon arrangement mode shown in Fig. 7,
Cylindrical radius is 3 μm, and hexagonal side length is 80 μm, and height is 100nm, area accounting
It is 0.5%.
The device architecture of embodiment 5 is:
Glass/ cylinder removing layer (100nm)/ITO/NPB (80nm)/Alq3: 2%
C545T(30nm)/Alq3(30nm)/LiF(1nm)/Al(150nm)
Wherein microcylinder is cylinder, and described microcylinder uses the hexagon arrangement mode shown in Fig. 7,
Cylindrical radius is 5 μm, and hexagonal side length is 80 μm, and height is 100nm, and area accounts for
Ratio is 2.8%.
The device architecture of embodiment 6 is:
Glass/ cylinder removing layer (100nm)/ITO/NPB (80nm)/Alq3: 2%
C545T(30nm)/Alq3(30nm)/LiF(1nm)/Al(150nm)
Wherein microcylinder is cylinder, and described microcylinder uses the hexagon arrangement mode shown in Fig. 7,
Cylindrical radius is 10 μm, and hexagonal side length is 80 μm, and height is 100nm, and area accounts for
Ratio is 5.66%.
The device architecture of embodiment 7 is:
Glass/ cylinder removing layer (100nm)/ITO/NPB (80nm)/Alq3: 2%
C545T(30nm)/Alq3(30nm)/LiF(1nm)/Al(150nm)
Wherein microcylinder is cylinder, and described microcylinder uses the hexagon arrangement mode shown in Fig. 7,
Cylindrical radius is 20 μm, and hexagonal side length is 80 μm, and height is 100nm, and area accounts for
Ratio is 22.66%.
Table 2 embodiment 4-7 the performance test results
From the contrast of upper table it can be seen that when area accounting is at 0.5-5.66%, device correspondence high light
Extraction efficiency, and keep good mirror effect.When area accounting reaches 22.66%, and device exiting surface is seen
Examine mist degree phenomenon.
Each film layer preparation technology of embodiment 8 as above, simply prepares micro-at ITO with organic layer interface
Column construction layer.The mode of this microtrabeculae shape structure sheaf semen collection close mask vacuum evaporation is prepared.
The device architecture of embodiment 8 is:
Glass/ITO/ mask evaporation NPB removing layer (50nm)/NPB (80nm)/Alq3: 2%
C545T(30nm)/Alq3(30nm)/LiF(1nm)/Al(150nm)
Wherein microcylinder is cylinder, and described microcylinder uses the hexagon arrangement mode shown in Fig. 7,
Cylindrical radius is 10 μm, and hexagonal side length is 100 μm.It is highly 50nm.
Each film layer preparation technology of embodiment 9 as above, is simply prepared with organic layer interface at organic layer
Microtrabeculae shape structure sheaf.The mode of this microtrabeculae shape structure sheaf semen collection close mask vacuum evaporation is prepared.
The device architecture of embodiment 9 is:
Glass/ITO/NPB(80nm)/Alq3: 2%C545T (30nm)/mask evaporating Al q3Take out
Layer (50nm)/Alq3(30nm)/LiF(1nm)/Al(150nm)
Wherein microcylinder is cylinder, and described microcylinder uses the hexagon arrangement mode shown in Fig. 7,
Cylindrical radius is 10 μm, and hexagonal side length is 100 μm.It is highly 50nm.
Each film layer preparation technology of embodiment 10 as above, is at organic layer and electron injecting layer interface
Prepare microtrabeculae shape structure sheaf.The mode of this microtrabeculae shape structure sheaf semen collection close mask vacuum evaporation is carried out
Preparation.
The device architecture of embodiment 10 is:
Glass/ITO/NPB(80nm)/Alq3: 2%C545T (30nm)/Alq3(30nm)/cover
Film evaporating Al q3Removing layer (50nm)/LiF (1nm)/Al (150nm)
Wherein microcylinder is cylinder, and described microcylinder uses the hexagon arrangement mode shown in Fig. 7,
Cylindrical radius is 10 μm, and hexagonal side length is 100 μm.It is highly 50nm.
Each film layer preparation technology of embodiment 11 as above, is at electron injecting layer and metallic cathode circle
Microtrabeculae shape structure sheaf is prepared in face.The mode of this microtrabeculae shape structure sheaf semen collection close mask vacuum evaporation is entered
Row preparation.
The device architecture of embodiment 11 is:
Glass/ITO/NPB(80nm)/Alq3: 2%C545T (30nm)/Alq3(30nm)/
LiF (1nm)/mask evaporation LiF removing layer (50nm)/Al (150nm)
Wherein microcylinder is cylinder, and described microcylinder uses the hexagon arrangement mode shown in Fig. 7,
Cylindrical radius is 10 μm, and hexagonal side length is 100 μm.It is highly 50nm.
Table 3 embodiment 8-11 the performance test results
Contrast it can be seen that this light removing layer is positioned at above-mentioned interface from upper table, be respectively provided with good light
Take out performance, and screen body keeps good mirror effect.
Obviously, above-described embodiment is only for clearly demonstrating example, and not to enforcement
The restriction of mode.For those of ordinary skill in the field, on the basis of the above description
Can also make other changes in different forms.Here without also cannot be to all of enforcement
Mode gives exhaustive.And the obvious change thus extended out or variation are still in the present invention
Protection domain among.
Claims (12)
1. an organic electroluminescence device, including substrate (1), is arranged on having on substrate (1)
Electroluminescence unit, described organic electroluminescence cell includes the first electrode stacking gradually setting
Layer (2), organic function layer (4) and the second electrode lay (5), described first electrode layer is near described
Substrate is arranged；It is characterized in that, described organic electroluminescence device also includes being arranged on described substrate
(1) the light removing layer and between the second electrode lay (5), described smooth removing layer is provided with in order to
Change some not homogeneity interface zones of the second electrode reflecting interface planarization, described not homogeneity interface
Region accounts for the 0.1-30% of described smooth removing layer area.
Organic electroluminescence device the most according to claim 1, it is characterised in that described light
Removing layer is microcylinder light removing layer (3) that some microcylinders (6) are constituted, adjacent described microcylinder
(6) be white space between, described microcylinder (6) constitute described in not homogeneity interface zone.
Organic electroluminescence device the most according to claim 1, it is characterised in that described light
Removing layer includes that light takes out bulk material and the some micropores (7) arranged in light takes out bulk material,
Described micropore (7) constitute described in not homogeneity interface zone.
4. according to the arbitrary described organic electroluminescence device of claim 1-3, it is characterised in that institute
State not homogeneity interface zone and account for the 0.1-20% of described smooth removing layer area.
Organic electroluminescence device the most according to claim 4, it is characterised in that described not
The area of homogeneity interface zone accounts for the 0.5-10% of described smooth removing layer area.
Organic electroluminescence device the most according to claim 5, it is characterised in that described not
The area of homogeneity interface zone accounts for the 0.5-5% of described smooth removing layer area.
7. according to the organic electroluminescence device described in Claims 2 or 3, it is characterised in that institute
State microcylinder (6) or micropore (7) through described light removing layer, described microcylinder (6) or
The central axis of micropore (7) is in described substrate (1).
8. according to the organic electroluminescence device described in Claims 2 or 3, it is characterised in that institute
Stating the cross section of microcylinder (6) or micropore (7) is regular shape and/or irregularly shaped.
9. according to the organic electroluminescence device described in Claims 2 or 3, it is characterised in that phase
Beeline 0 < d≤100 μm between adjacent described microcylinder (6) or micropore (7).
10. according to the organic electroluminescence device described in Claims 2 or 3, it is characterised in that institute
The thickness stating light removing layer is 1-10000nm.
11. organic electroluminescence devices according to claim 9, it is characterised in that described light
The thickness of removing layer is 10-3000nm.
12. organic electroluminescence devices according to claim 1, it is characterised in that described in have
Machine luminescent layer includes hole injection layer, hole transmission layer, luminescent layer, electron transfer layer and electronics note
Enter a layer in layer or a combination thereof；
Described smooth removing layer be arranged on described substrate (1), the first electrode (2), hole injection layer,
Hole transmission layer, luminescent layer, electron transfer layer, electron injecting layer and the second electrode lay (5) are appointed
Anticipate between adjacent two-layer.
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| CN109390478A (en) * | 2017-08-07 | 2019-02-26 | 固安翌光科技有限公司 | A kind of organic electroluminescence device |
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| CN105810834B (en) | 2018-02-27 |
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