CN105932178A - Preparation method for organic electroluminescent device - Google Patents
Preparation method for organic electroluminescent device Download PDFInfo
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- CN105932178A CN105932178A CN201610323709.4A CN201610323709A CN105932178A CN 105932178 A CN105932178 A CN 105932178A CN 201610323709 A CN201610323709 A CN 201610323709A CN 105932178 A CN105932178 A CN 105932178A
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- hole injection
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- injection layer
- organic electroluminescence
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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
- H10K71/10—Deposition of organic active material
- H10K71/16—Deposition of organic active material using physical vapour deposition [PVD], e.g. vacuum deposition or sputtering
- H10K71/166—Deposition of organic active material using physical vapour deposition [PVD], e.g. vacuum deposition or sputtering using selective deposition, e.g. using a mask
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Abstract
The invention discloses a preparation method for an organic electroluminescent device, and the method comprises the steps: forming a common layer on a substrate; forming a green photon hole injection layer at a part, corresponding to a green region, of the common layer, forming a red photon hole injection layer at a part, corresponding to a red region, of the common layer, and loading an electric field or a magnetic field in the forming processes of the green photon hole injection layer and the red photon hole injection layer. According to the technical scheme of the invention, the method changes the hole injection characteristics through loading the electric field or the magnetic field in the forming processes of the hole injection layers of a green light device and a red light device, thereby improving the performances of the green light device and the red light device, enabling the exciton composite centers of the green light device and the red light device to be located at the centers of the light-emitting layers, improving the efficiency of the organic electroluminescent device, and prolonging the service of the organic electroluminescent device. In addition, according to the technical scheme of the invention, the method enables the performance of the light-emitting device to be optimal in a given material system, improves the utilization rate of materials, and reduces the cost.
Description
Technical field
The present invention relates to Display Technique field, particularly relate to a kind of organic electroluminescence device
Preparation method.
Background technology
Organic electroluminescence device (Organic Light-Emitting Diode, OLED) has
Self-luminous, low-power consumption, the advantage such as flexibility, high-contrast can be made.Due to ruddiness, green glow
Different with the wavelength of blue light, cause the red device of existing organic electroluminescence device, green
The blooming that optical device is corresponding with blue-light device is different, therefore red device, green device
The physical film thickness corresponding with blue-light device is the most different, and the thickness of red device is maximum, blue light device
The thickness of part is minimum.Thickness can be entered by prior art by adjusting the thickness of hole injection layer
Row sum-equal matrix.The optimum film thickness of organic electroluminescence device is determined by RGB luminescent material, and
And in order to reduce cost, identical hole injection layer material selected by existing RGB device.
The efficiency of organic electroluminescence device is relevant to the position in exciton complex centre with the life-span, existing
Organic electroluminescence device among the position, exciton complex centre of green device and red device
In the side of luminescent layer deflection electron injecting layer, reduce the efficiency of organic electroluminescence device
And the life-span.
Summary of the invention
For solving the problems referred to above, the present invention provides the preparation side of a kind of organic electroluminescence device
Method, for solving the green device among existing organic electroluminescence device and red device
Exciton complex centre be positioned at luminescent layer deflection electronics side, reduce organic electroluminescent
The efficiency of device and the problem in life-span.
To this end, the present invention provides the preparation method of a kind of organic electroluminescence device, including:
Underlay substrate is formed shared layer；
The sub-hole injection layer of green glow is formed, at ruddiness on the shared layer that green wavelength is corresponding
Form the sub-hole injection layer of ruddiness on the shared layer that region is corresponding, form described green glow
Electric field or magnetic field is applied among the process of hole injection layer and the sub-hole injection layer of described ruddiness.
Optionally, the direction of an electric field of described electric field is parallel to described underlay substrate.
Optionally, the electric-field intensity scope of described electric field includes 500V/m to 1000V/m.
Optionally, the electric-field intensity scope of described electric field includes 600V/m to 800V/m.
Optionally, the electric-field intensity of described electric field is 700V/m.
Optionally, the magnetic direction in described magnetic field is parallel to described underlay substrate.
Optionally, the magnetic field intensity scope in described magnetic field includes 500A/m to 1000A/m.
Optionally, the magnetic field intensity scope in described magnetic field includes 600A/m to 800A/m.
Optionally, the magnetic field intensity in described magnetic field is 700A/m.
Optionally, the thickness range of described shared layer includes 40nm to 80nm, described green glow
The thickness range of sub-hole injection layer includes 20nm to 50nm, and the sub-hole of described ruddiness is injected
The thickness range of layer includes 60nm to 100nm.
Optionally, the thickness of described shared layer is 60nm, the sub-hole injection layer of described green glow
Thickness is 35nm, and the thickness of the sub-hole injection layer of described ruddiness is 80nm.
Optionally, the evaporation rate forming shared layer is 1A/s, forms the sub-hole of green glow and injects
The evaporation rate of layer is 0.5A/s, and the evaporation rate forming the sub-hole injection layer of ruddiness is 1A/s.
The present invention has a following beneficial effect:
The preparation method of the organic electroluminescence device that the present invention provides includes: at underlay substrate
Upper formation shared layer；On the shared layer that green wavelength is corresponding, form the sub-hole of green glow inject
Layer, forms the sub-hole injection layer of ruddiness on the shared layer that red light region is corresponding, is being formed
Electricity is loaded among the process of the sub-hole injection layer of described green glow and the sub-hole injection layer of described ruddiness
Field or magnetic field.The technical scheme that the present invention provides is at the hole note of green device with red device
Enter among the process that layer is formed, by applying electric field or the sky of magnetic field change hole injection layer
Cave injection properties, thus improve the performance of green device and red device so that green glow device
The exciton complex centre of part and red device is positioned at luminescent layer center, improves organic electroluminescence and sends out
The efficiency of optical device and life-span.It addition, the technical scheme that the present invention provides does not increases operation,
And red device, green device and blue light can be made under given material system
The performance of device all reaches optimum state, such that it is able to realize using identical hole injection layer
Material is formed with organic electroluminescence devices, improves the utilization rate of material, reduces cost.
Accompanying drawing explanation
The preparation method of a kind of organic electroluminescence device that Fig. 1 provides for the embodiment of the present invention one
Flow chart；
Fig. 2 is that embodiment one forms the sub-hole injection layer of green glow and the sub-hole injection layer of ruddiness
Schematic diagram；
The schematic diagram of the organic electroluminescence device that Fig. 3 provides for embodiment one.
Detailed description of the invention
For making those skilled in the art be more fully understood that technical scheme, knot below
Close accompanying drawing the preparation method of the organic electroluminescence device that the present invention provides is retouched in detail
State.
Embodiment one
The preparation side of a kind of organic electroluminescence device that Fig. 1 provides for the embodiment of the present invention one
The flow chart of method.As it is shown in figure 1, the preparation method of described organic electroluminescence device includes:
Step 1001, on underlay substrate formed shared layer.
Fig. 2 is that embodiment one forms the sub-hole injection layer of green glow and the sub-hole injection layer of ruddiness
Schematic diagram.As in figure 2 it is shown, form anode 200 on underlay substrate 100, at described anode
Form cushion 300 on 200, described cushion 300 is formed common layer 400.Need
Explaining, among actual process process, underlay substrate is the most inverted, and Fig. 2 is also
Obtain according to actual process, but with substrate when technical process is described by the present embodiment
Normal situation about placing is described.For blue region, described common layer 400 is i.e.
For blue light hole injection layer, now the exciton complex centre of blue-light device is positioned at luminescent layer center
Near side, hole, device has optimal efficiency and life-span.
Step 1002, formation green glow hole injection on the shared layer that green wavelength is corresponding
Layer, forms the sub-hole injection layer of ruddiness on the shared layer that red light region is corresponding, is being formed
Electricity is applied among the process of the sub-hole injection layer of described green glow and the sub-hole injection layer of described ruddiness
Field or magnetic field.
In the present embodiment, apply magnetic field and electric field and there is identical effect, therefore retouching below
State all as a example by electric field.Apply to be parallel to the electric field of underlay substrate 100, optionally, described
The electric-field intensity scope of electric field includes 500V/m to 1000V/m.Preferably, described electric field
Electric-field intensity scope includes 600V/m to 800V/m.It is furthermore preferred that the electric field of described electric field
Intensity is 700V/m.The sub-hole of green glow is formed on the shared layer 400 that green wavelength is corresponding
Implanted layer 401, forms the sub-hole of ruddiness on the shared layer 400 that red light region is corresponding simultaneously
Implanted layer 402.Therefore, the green glow hole injection layer that the present embodiment provides is noted by the sub-hole of green glow
Entering layer 401 and shared layer 400 is constituted, ruddiness hole injection layer is by the sub-hole injection layer of ruddiness
402 and shared layer 400 constitute.
Hole injection layer is deposited with shared layer 400 by organic material from evaporation source and is formed,
This process can be regarded as the result that the ultrathin membrane of molecular thickness is in layer accumulated.At this
Among individual process, organic material form is easily subject to the impact in electric field or magnetic field, Jin Ergai
Become electrology characteristic mobility and the energy level etc. of hole injection layer.So can regulate ruddiness
The concentration of carrier (electronics and hole) and mobility among device and green device, thus
Improve the performance of organic luminescent device so that during the exciton of green device and red device is compound
The heart is positioned at luminescent layer center, improves efficiency and the life-span of organic electroluminescence device.It addition,
The technical scheme that the present embodiment provides does not increases operation, and can be in given material bodies
The performance making red device, green device and blue-light device under system all reaches optimal shape
State, such that it is able to realize using identical hole injection layer material to form organic electroluminescence
Part, improves the utilization rate of material, reduces cost.
Table 1
Table 1 is the contrast before and after electric field action of the performance of organic luminescent device.Such as table 1 institute
Showing, when not having electric field action among forming process, the luminous efficiency of green device is 80
Cd/A, it is 40h that luminescent lifetime is become time of 97% from 100%.Have among forming process
During electric field action, the luminous efficiency of green device is 87cd/A, and luminescent lifetime is become by 100%
Be 97% time be 56h.When there is no electric field action among forming process, red device
Luminous efficiency is 27cd/A, and it is 102h that luminescent lifetime is become time of 97% from 100%.?
When having electric field action among forming process, the luminous efficiency of green device is 32cd/A, luminous
It is 150h that life-span is become time of 97% from 100%.It can be seen that green glow after applying electric field
Device and the efficiency of red device and life-span are highly improved.
In the present embodiment, the evaporation rate forming shared layer 400 is 1A/s, forms green glow
The evaporation rate of hole injection layer is 0.5A/s, forms the evaporation speed of the sub-hole injection layer of ruddiness
Rate is 1A/s.Optionally, the thickness range of described shared layer includes 40nm to 80nm, institute
The thickness range stating the sub-hole injection layer of green glow includes 20nm to 50nm, and described ruddiness is empty
The thickness range of cave implanted layer includes 60nm to 100nm.Preferably, the thickness of described shared layer
Degree is 60nm, and the thickness of the sub-hole injection layer of described green glow is 35nm, and described ruddiness is empty
The thickness of cave implanted layer is 80nm.
The schematic diagram of the organic electroluminescence device that Fig. 3 provides for embodiment one.Such as Fig. 3 institute
Show, hole injection layer forms hole transmission layer 500, on described hole transmission layer 500
Formed luminescent layer, described luminescent layer include blue light-emitting layer 601, green light emitting layer 602 and
Red light emitting layer 603, forms electron transfer layer 700, on the light-emitting layer at described electronics
Form electron injecting layer 800 in transport layer 700, described electron injecting layer 800 is formed negative electrode
900.The organic electroluminescence device that the present embodiment provides includes anode, negative electrode and is arranged on
Functional layer between described anode and described negative electrode.Execute between described anode and described negative electrode
During making alive, under the driving of external voltage, inject with by negative electrode anode injected holes
Electronics enter into the recombination region of described functional layer and be compounded to form exciton, the radiation of described exciton jumps
Move transmitting photon thus form electroluminescent.The technical scheme that the present embodiment provides is at green glow device
Among the process that the hole injection layer of part and red device is formed, by applying electric field or magnetic
Change the hole-injection characteristics of hole injection layer so that swashing of green device and red device
Sub-complex centre is positioned at luminescent layer center, and the exciton complex centre of blue-light device is positioned at and sends out
Photosphere center is near side, hole, thus improves efficiency and the longevity of organic electroluminescence device
Life.
The preparation method of the organic electroluminescence device that the present embodiment provides includes: at substrate base
Shared layer is formed on plate；Green glow hole note is formed on the shared layer that green wavelength is corresponding
Enter layer, on the shared layer that red light region is corresponding, form the sub-hole injection layer of ruddiness, in shape
Become and load among the process of the sub-hole injection layer of described green glow and the sub-hole injection layer of described ruddiness
Electric field or magnetic field.The technical scheme that the present embodiment provides is at the sky of green device Yu red device
Among the process that cave implanted layer is formed, change hole injection layer by applying electric field or magnetic field
Hole-injection characteristics, thus improve the performance of green device and red device so that green
The exciton complex centre of optical device and red device is positioned at luminescent layer center, improves Organic Electricity
The efficiency of electroluminescence device and life-span.It addition, the technical scheme that the present embodiment provides does not increases
Add operation, and red device, green device can be made under given material system
And the performance of blue-light device all reaches optimum state, such that it is able to realize using identical sky
Cave implanted layer material is formed with organic electroluminescence devices, improves the utilization rate of material, reduces
Cost.
It is understood that the principle that is intended to be merely illustrative of the present of embodiment of above and
The illustrative embodiments used, but the invention is not limited in this.For in this area
Those of ordinary skill for, without departing from the spirit and substance in the present invention, can
To make various modification and improvement, these modification and improvement are also considered as protection scope of the present invention.
Claims (12)
1. the preparation method of an organic electroluminescence device, it is characterised in that including:
Underlay substrate is formed shared layer；
The sub-hole injection layer of green glow is formed, at ruddiness on the shared layer that green wavelength is corresponding
Form the sub-hole injection layer of ruddiness on the shared layer that region is corresponding, form described green glow
Electric field or magnetic field is applied among the process of hole injection layer and the sub-hole injection layer of described ruddiness.
The preparation method of organic electroluminescence device the most according to claim 1, it is special
Levying and be, the direction of an electric field of described electric field is parallel to described underlay substrate.
The preparation method of organic electroluminescence device the most according to claim 1, it is special
Levying and be, the electric-field intensity scope of described electric field includes 500V/m to 1000V/m.
The preparation method of organic electroluminescence device the most according to claim 3, it is special
Levying and be, the electric-field intensity scope of described electric field includes 600V/m to 800V/m.
The preparation method of organic electroluminescence device the most according to claim 4, it is special
Levying and be, the electric-field intensity of described electric field is 700V/m.
The preparation method of organic electroluminescence device the most according to claim 1, it is special
Levying and be, the magnetic direction in described magnetic field is parallel to described underlay substrate.
The preparation method of organic electroluminescence device the most according to claim 1, it is special
Levying and be, the magnetic field intensity scope in described magnetic field includes 500A/m to 1000A/m.
The preparation method of organic electroluminescence device the most according to claim 7, it is special
Levying and be, the magnetic field intensity scope in described magnetic field includes 600A/m to 800A/m.
The preparation method of organic electroluminescence device the most according to claim 8, it is special
Levying and be, the magnetic field intensity in described magnetic field is 700A/m.
The preparation method of organic electroluminescence device the most according to claim 1, its
Being characterised by, the thickness range of described shared layer includes 40nm to 80nm, described green glow
The thickness range of hole injection layer includes 20nm to 50nm, the sub-hole injection layer of described ruddiness
Thickness range include 60nm to 100nm.
The preparation method of 11. organic electroluminescence devices according to claim 10, its
Being characterised by, the thickness of described shared layer is 60nm, the thickness of the sub-hole injection layer of described green glow
Degree is 35nm, and the thickness of the sub-hole injection layer of described ruddiness is 80nm.
The preparation method of 12. organic electroluminescence devices according to claim 1, its
Being characterised by, the evaporation rate forming shared layer is 1A/s, forms the sub-hole injection layer of green glow
Evaporation rate be 0.5A/s, the evaporation rate forming the sub-hole injection layer of ruddiness is 1A/s.
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Cited By (1)
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| CN106384787A (en) * | 2016-11-30 | 2017-02-08 | 成都京东方光电科技有限公司 | Organic light-emitting diode assembly and lamp |
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| US20100156280A1 (en) * | 2008-12-19 | 2010-06-24 | Samsung Electronics Co., Ltd. | Organic light emitting device and method for manufacturing the same |
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| US20060181204A1 (en) * | 2004-01-28 | 2006-08-17 | Furong Zhu | Flexible organic light emitting devices |
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| US20100156280A1 (en) * | 2008-12-19 | 2010-06-24 | Samsung Electronics Co., Ltd. | Organic light emitting device and method for manufacturing the same |
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| CN106384787A (en) * | 2016-11-30 | 2017-02-08 | 成都京东方光电科技有限公司 | Organic light-emitting diode assembly and lamp |
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| US10566563B2 (en) | 2016-11-30 | 2020-02-18 | Boe Technology Group Co., Ltd. | Organic light emitting diode component and lamp |
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