CN104393183B - A kind of Organnic electroluminescent device and preparation method thereof - Google Patents
A kind of Organnic electroluminescent device and preparation method thereof Download PDFInfo
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- CN104393183B CN104393183B CN201410654749.8A CN201410654749A CN104393183B CN 104393183 B CN104393183 B CN 104393183B CN 201410654749 A CN201410654749 A CN 201410654749A CN 104393183 B CN104393183 B CN 104393183B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/88—Dummy elements, i.e. elements having non-functional features
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/301—Details of OLEDs
- H10K2102/302—Details of OLEDs of OLED structures
Abstract
The invention belongs to field of organic electroluminescence, a kind of described Organnic electroluminescent device, including first substrate, second substrate, some luminescence units, the non-luminous region of each luminescence unit of correspondence have been stacked light-absorption layer and conductive layer.Conductive layer is connected with the second conductive layers make contact in luminescence unit, can improve the electric conductivity of the second electrode lay, weakens IR pressure drops；Light-absorption layer, which is arranged on non-luminous region, can effectively reduce the reflection light of first electrode layer, so as to effectively reduce influence of the ambient light to display effect.The preparation method of the Organnic electroluminescent device, first forms light-absorption layer, conductive layer and luminescence unit on second substrate, is packaged first substrate is fastened on luminescence unit.The second electrode lay of luminescence unit is directly prepared on the electrically conductive, can effectively be fitted with the second electrode lay, is reduced the risk of open circuit, is improved the reliability of connection.Meanwhile, prepared by double plate techniques, effectively reduce man-hour, improve production efficiency.
Description
Technical field
The present invention relates to field of organic electroluminescence, and in particular to a kind of organic electroluminescence hair that can effectively reduce negative electrode sheet resistance
Electro-optical device and preparation method thereof.
Background technology
Organnic electroluminescent device (English full name Organic Light Emitting Display, abbreviation OLED) is main
Dynamic luminescent device, has the advantages that high-contrast, wide viewing angle, low-power consumption, volume are thinner, is expected to show as main flow flat board of future generation
Show technology, be one of the most technologies that attract attention in current flat panel display.
Direction is projected according to the light of Organic Light Emitting Diode in Organnic electroluminescent device, Organnic electroluminescent device can
To be divided into bottom emitting device and top emitting device.Because bottom emitting device light will also be by including thin after transparent anode injection
The image element circuit layer of film transistor, has a strong impact on the aperture opening ratio and luminous efficiency of device；Therefore, light is directly penetrated from transparent cathode
Go out, so as to realize that the top emitting device of high aperture and high-luminous-efficiency is increasingly becoming the master of field of organic electroluminescence research
Stream.
In top emitting device, in order to ensure light extraction efficiency, it will usually reduce cathode electrode layer thickness to ensure enough printing opacities
Rate；However, causing cathode layer sheet resistance high because cathode electrode layer thickness is relatively thin, IR pressure drops are easily caused, so as to influence display performance.Together
When, in order to further improve the luminous efficiency of Organnic electroluminescent device, anode is generally made to the reflection electricity with reflecting layer
Pole, can produce a large amount of strong reflections when being used under strong light environment, it is impossible to be clearly seen display content, influence using effect.
The content of the invention
Therefore, to be solved by this invention is that existing top radiation organic EL display device cathode layer sheet resistance is high, with
And the problem of can not normally be used under strong light environment, so as to provide a kind of organic electroluminescence that cathode layer sheet resistance is low, reflection light is few
Luminous display unit and preparation method thereof.
In order to solve the above technical problems, the technical solution adopted by the present invention is as follows：
Organnic electroluminescent device of the present invention, including first substrate, second substrate and it is arranged on described first
Some luminescence units between substrate and the second substrate, the luminescence unit include first electrode layer, the second electrode lay with
And the organic luminous layer between the first electrode layer and the second electrode lay is arranged on, the first electrode is placed on described
First substrate side, the second electrode is placed on the second substrate side,
The non-luminous region of each luminescence unit of correspondence, is also cascading for the extinction for absorbing reflection light
Layer and the conductive layer of the sheet resistance value for reducing the second electrode lay, the conductive layer are set close to the second electrode lay.
The light-absorption layer and/or the conductive layer are continuous net-shaped or dispersal type lattice-like.
The thickness of the light-absorption layer is 100nm~5000nm, and the thickness of the conductive layer is 50nm~500nm.
The transmitance of the light-absorption layer is 1%~15%.
The sheet resistance value of the conductive layer is 10 Ω/~100 Ω/.
Preferably, the conductive layer is graphene layer.
The first substrate is thin-film transistor array base-plate.
The preparation method of Organnic electroluminescent device of the present invention, comprises the following steps：
S1, light-absorption layer and conductive layer are sequentially formed on second substrate；
S2, some luminescence units for covering the light-absorption layer and the conductive layer are formed on the second substrate, it is described
Luminescence unit includes first electrode layer, organic luminous layer and the second electrode lay being cascading, and the second electrode lay is leaned on
The nearly conductive layer is set, the non-luminous region of the light-absorption layer each luminescence unit corresponding with the conductive layer；
S3, first substrate is set on the luminescence unit, device encapsulation is carried out.
Preferably, the light-absorption layer described in step S1 is prepared by coating, exposure and etching technics.
Preferably, the first substrate is thin-film transistor array base-plate, first electrode layer in each luminescence unit
Electrically connected with the electric connection layer in the first substrate.
The above-mentioned technical proposal of the present invention has advantages below compared with prior art：
1. a kind of Organnic electroluminescent device of the present invention, including first substrate, second substrate and it is arranged on
Some luminescence units between one substrate and second substrate, along away from first substrate direction, each luminescence unit includes layer successively
Folded first electrode layer, organic luminous layer and the second electrode lay set；The second substrate close to the second electrode lay one
Side, the non-luminous region of each luminescence unit of correspondence, be also cascading light-absorption layer for absorbing reflection light and
Conductive layer, the conductive layer is set close to the second electrode lay.The conductive layer is connected with second conductive layers make contact, energy
Enough improve the electric conductivity of the second electrode lay, weaken IR pressure drops；The light-absorption layer is arranged on non-luminous region and can effectively reduced
The reflection light of first electrode layer, so as to effectively reduce influence of the ambient light to display effect；Simultaneously as the light-absorption layer
Non-luminous region is arranged at the conductive layer, original aperture opening ratio of the Organnic electroluminescent device is not influenceed.
2. the preparation method of Organnic electroluminescent device of the present invention, using double plate techniques, first on second substrate
Light-absorption layer, conductive layer and luminescence unit are formed, is packaged being fastened on first substrate on the luminescence unit.It is not only described
Conductive layer is connected with second conductive layers make contact, can improve the electric conductivity of the second electrode lay, weakens IR pressure drops, the suction
Photosphere, which is arranged on non-luminous region, can effectively reduce the reflection light of first electrode layer, so as to effectively reduce ambient light to aobvious
Show the influence of effect；Moreover, the second electrode lay of the luminescence unit is directly prepared on the conductive layer, can be with described second
Electrode layer is effectively fitted, and is reduced the risk of open circuit, is improved the reliability of connection.Meanwhile, organic electroluminescence of the present invention
The preparation method of light-emitting device uses the element on double plate techniques, i.e., described first substrate and the second substrate to prepare simultaneously,
Man-hour is effectively reduced, production efficiency is improved.
Brief description of the drawings
In order that present disclosure is more likely to be clearly understood, specific embodiment and combination below according to the present invention
Accompanying drawing, the present invention is further detailed explanation, wherein
Fig. 1 is the installation diagram of Organnic electroluminescent device of the present invention；
Fig. 2 is the preparation flow figure of Organnic electroluminescent device of the present invention.
Reference is expressed as in figure：1- first substrates, 11- electric connection layers, 2- second substrates, 3- luminescence units, 31-
One electrode layer, 32- the second electrode lays, 33- organic luminous layers, 4- light-absorption layers, 5- conductive layers.
Embodiment
In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with reality of the accompanying drawing to the present invention
The mode of applying is described in further detail.
The present invention can be embodied in many different forms, and should not be construed as limited to embodiment set forth herein.
Opposite there is provided 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 only be defined by the appended claims.In the accompanying drawings, for clarity, Ceng He areas can be exaggerated
The size and relative size in domain.It should be appreciated that when element such as layer, region or substrate are referred to as " formation " or " set
" another element " on " when, the element can be arranged directly on another element, or can also have intermediary element.
On the contrary, when element is referred to as on " being formed directly into " or " being set directly at " another element, in the absence of intermediary element.
The present embodiment provides a kind of Organnic electroluminescent device, as shown in figure 1, including first substrate 1, second substrate 2, with
And some luminescence units 3 being arranged between first substrate 1 and second substrate 2 (for clarity, illustrate only one in Fig. 1
Individual luminescence unit, it should be appreciated that the luminescence unit can be multiple, and its quantity is not limited), along away from described first
The direction of substrate 1, each luminescence unit 3 includes first electrode layer 31, the organic luminous layer 33 and the being cascading
Two electrode layers 32.
In the present embodiment, the second substrate 2 is glass substrate, is used as the convertible embodiment of the present invention, described second
Substrate 2 is selected from, but not limited to, glass substrate, polymeric substrates, can realize the purpose of the present invention, belongs to the protection of the present invention
Scope.
The first substrate 1 is selected from, but not limited to, one in glass substrate, polymeric substrates, thin-film transistor array base-plate
Kind, the present embodiment is preferably thin-film transistor array base-plate.
In the present embodiment, the luminescence unit 3 is Organic Light Emitting Diode, and its structure is compared with technology.In order to improve
The luminous efficiency of Organnic electroluminescent device is stated, the first electrode layer 31 is preferably reflecting electrode, is selected from, but not limited to, Ag/
One kind in ITO, ITO/Ag/ITO, ITO/Al/ITO, thickness is 100nm~500nm, the preferred ITO/Ag/ITO knots of the present embodiment
Structure, thickness is 30nm/120nm/30nm；The second electrode lay 32 is selected from, but not limited to, one kind in Mg/Ag, Al/Ag/Ag,
Thickness be 50nm~200nm, the preferred Mg/Ag structures of the present embodiment, thickness is 50nm/50nm；The organic luminous layer 33 is selected from
But it is not limited at least one of organic molecule luminescent material of the prior art, polymeric light-emitting materials；It is used as the present invention's
Convertible embodiment, the luminescence unit 3 also include hole injection layer, hole transmission layer, electronic barrier layer, hole blocking layer,
One or more combinations in electron transfer layer, electron injecting layer.In the present embodiment, the structure of the luminescence unit 3 is
ITO/Ag/ITO (first electrode layer, 30nm/120nm/30nm)/CuPc (hole injection layer, 60nm)/TPD (hole transmission layer,
35nm)/CBP (luminescent layer, 50nm):Ir(ppy)3(15%):Ir(piq)3(0.5%)/LiF (electron injecting layer, 35nm)/Mg/
Ag (the second electrode lay, 50nm/50nm).
In the first electrode layer 31 and the first substrate 1 electric connection layer 11 (in the present embodiment, the electric connection layer
11 be the source electrode of thin film transistor (TFT) or drain electrode or the conducting element electrically connected with one of both) electrical connection.
The second substrate 2 is close to the side of the second electrode lay 32, the non-light-emitting area of each luminescence unit 3 of correspondence
Domain, being also cascading has light-absorption layer 4 and conductive layer 5, and the conductive layer 5 is set close to the second electrode lay 32；It is described
Light-absorption layer 4 is used to absorb reflection light, and the conductive layer 5 is used to reduce the sheet resistance value of the second electrode lay 32.
The light-absorption layer 4 is selected from, but not limited to, organic glue-line containing the alternatively non-transparent material such as carbon black and/or CrO, and thickness is
100nm~5000nm, transmitance is 1%~15%；The present embodiment is preferably containing Cr2O3Photoresist layer, thickness is 2000 to receive
Rice, transmitance is 5%.
The conductive layer 5 is selected from, but not limited to, the low-resistance materials such as graphene layer, Ag layers, and thickness is 50nm~500nm, sheet resistance
It is worth for 10 Ω/~100 Ω/；The present embodiment is preferably graphene layer, and thickness is 100nm, and sheet resistance value is 30 Ω/.
The light-absorption layer 4 and/or the conductive layer 5 are continuous net-shaped or dispersal type lattice-like, in the present embodiment, described to inhale
The non-luminous region of photosphere 4 and the correspondence of the conductive layer 5 luminescence unit 3 forms continuous network structure.The conductive layer 5
Set close to the second electrode lay 32.The conductive layer 5 contacts connection with second conductive layer 32, can improve described
The electric conductivity of two electrode layers 32, weakens IR pressure drops, so as to improve the signal control performance of the Organnic electroluminescent device.Institute
The reflection light of first electrode layer 31 can effectively be reduced by stating light-absorption layer 4 and being arranged on non-luminous region, so as to effectively reduce environment
Influence of the light to display effect.Simultaneously as the light-absorption layer 4 and the conductive layer 5 are arranged at non-luminous region, not shadow
Ring original aperture opening ratio of the Organnic electroluminescent device.
The preparation method of described Organnic electroluminescent device, as shown in Fig. 2 comprising the following steps：
S1, by coating, exposure and etching technics prepare the second substrate 2 correspondence luminescence unit 3 non-light-emitting area
Domain forms light-absorption layer 4, and conductive layer 5 is formed on the light-absorption layer 4 by chemical vapor deposition, exposure and etching technics.It is described
The pattern of light-absorption layer 4 and the conductive layer 5 can be the same or different, and be preferably the continuous net-shaped knot of identical in the present embodiment
Structure.
As the convertible embodiment of the present invention, the preparation technology not limited to this of the light-absorption layer 4 and the conductive layer 5,
It can be selected according to the property of material.
, can first formation light-absorbing material layer and conduction material on the second substrate 2 as the convertible embodiment of the present invention
The bed of material, then by etching technics, while carrying out patterning to light-absorbing material layer and conductive material layer forms the light-absorption layer 4 and institute
Conductive layer 5 is stated, can realize that the purpose of the present invention belongs to protection scope of the present invention.
S2, some luminescence units 3 for forming on the second substrate 2 the covering light-absorption layer 4 and the conductive layer 5.
The luminescence unit 3 includes the first electrode layer 31, organic luminous layer 33 and the second electrode lay 32 that are cascading, and described the
Two electrode layers 32 are set close to the conductive layer 5, and its preparation technology is compared with technology, and here is omitted.The luminescence unit 3
In the second electrode lay 32 directly prepare on the conductive layer 5, can effectively be fitted with the second electrode lay 32, reduce
The risk of open circuit, improves the reliability of connection.
S3, the setting first substrate 1 on the luminescence unit 3, carry out device encapsulation.First substrate described in the present embodiment
1 is preferably thin-film transistor array base-plate, and first electrode layer 31 need to be with the thin film transistor (TFT) array base in each luminescence unit 3
Electric connection layer 11 (in the present embodiment, source electrode or drain electrode of the electric connection layer 11 for thin film transistor (TFT)) electrical connection in plate.
In Organnic electroluminescent device of the present invention, by light-absorption layer 4 and institute described in the correspondence non-luminous region of luminescence unit 3
The setting of conductive layer 5 is stated, the subregion of first electrode layer 31 can be raised so that the first electrode layer 31 can be with
The thin film transistor (TFT) is effectively electrically connected, without setting auxiliary contacts element (brilliant i.e. with film in the first electrode layer 31
The source electrode of body pipe or the conducting element of drain electrode electrical connection), processing step is effectively reduced, production cost is saved.
In addition, the preparation method of Organnic electroluminescent device of the present invention is using double plate techniques, i.e., described first base
Element on plate 1 and the second substrate 2 is prepared simultaneously, is effectively reduced man-hour, is improved production efficiency.
Obviously, above-described embodiment is only intended to clearly illustrate example, and the not restriction to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among changing still in protection scope of the present invention.
Claims (8)
1. a kind of Organnic electroluminescent device, including first substrate, second substrate and be arranged on the first substrate with it is described
Some luminescence units between second substrate, the luminescence unit includes first electrode layer, the second electrode lay and is arranged on institute
The organic luminous layer between first electrode layer and the second electrode lay is stated, the first electrode is placed on the first substrate one
Side, the second electrode is placed on the second substrate side, it is characterised in that
The non-luminous region of each luminescence unit of correspondence, be also cascading for absorb the light-absorption layer of reflection light with
For the conductive layer for the sheet resistance value for reducing the second electrode lay, the conductive layer is set close to the second electrode lay, described
Light-absorption layer and/or conductive layer structure is so that the first electrode layer subregion are raised and are electrically connected with the first substrate
Connect；
The light-absorption layer and/or the conductive layer are continuous net-shaped or dispersal type lattice-like；
The first substrate is thin-film transistor array base-plate.
2. Organnic electroluminescent device according to claim 1, it is characterised in that the thickness of the light-absorption layer is 100nm
~5000nm, the thickness of the conductive layer is 50nm~500nm.
3. Organnic electroluminescent device according to claim 2, it is characterised in that the transmitance of the light-absorption layer is 1%
~15%.
4. Organnic electroluminescent device according to claim 2, it is characterised in that the sheet resistance value of the conductive layer is 10
Ω/~100 Ω/.
5. the Organnic electroluminescent device according to claim any one of 1-4, it is characterised in that the conductive layer is graphite
Alkene layer.
6. the preparation method of the Organnic electroluminescent device described in a kind of any one of claim 1-5, it is characterised in that including such as
Lower step：
S1, light-absorption layer and conductive layer are sequentially formed on second substrate；
S2, some luminescence units for covering the light-absorption layer and the conductive layer are formed on the second substrate, it is described luminous
Unit includes first electrode layer, organic luminous layer and the second electrode lay being cascading, and the second electrode lay is close to institute
State conductive layer setting, the non-luminous region of the light-absorption layer each luminescence unit corresponding with the conductive layer；
S3, first substrate is set on the luminescence unit, device encapsulation is carried out.
7. the preparation method of Organnic electroluminescent device according to claim 6, it is characterised in that described in step S1
Light-absorption layer is prepared by coating, exposure and etching technics.
8. the preparation method of Organnic electroluminescent device according to claim 6, it is characterised in that the first substrate is
First electrode layer is electrically connected with the electric connection layer in the first substrate in thin-film transistor array base-plate, each luminescence unit
Connect.
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| CN104900682A (en) * | 2015-06-10 | 2015-09-09 | 昆山国显光电有限公司 | Transparent display device, display structure and pixel unit structure thereof |
| CN109817677A (en) * | 2019-01-30 | 2019-05-28 | 武汉华星光电半导体显示技术有限公司 | A kind of organic light emitting diode display |
| CN111864105A (en) * | 2020-07-09 | 2020-10-30 | 武汉华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
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| KR20140144752A (en) * | 2012-01-19 | 2014-12-22 | 삼성디스플레이 주식회사 | Organic light emitting display devices and methods of manufacturing organic light emitting display devices |
| KR101468690B1 (en) * | 2012-11-19 | 2014-12-04 | 엔젯 주식회사 | Transparent electrode comprising elecrode line of high-vicosity conductive nano ink composition and touch sensor, transparent heater and electromagnetic wave shielding material using the transparent electrode |
| KR20140075228A (en) * | 2012-12-11 | 2014-06-19 | 삼성전자주식회사 | Display panel and display apparatus having the same |
| CN103838448B (en) * | 2014-02-18 | 2016-08-31 | 中国科学院重庆绿色智能技术研究院 | A kind of integrated OLED touch-screen display based on Graphene |
| CN103824975A (en) * | 2014-02-27 | 2014-05-28 | 上海和辉光电有限公司 | Method for improving ITO layer hole injection efficiency and anode structure of display device |
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| CN1992333A (en) * | 2005-12-30 | 2007-07-04 | Lg.菲利浦Lcd株式会社 | Dual-plate organic electro-luminescent device and method for manufacturing the same |
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Denomination of invention: The invention relates to an organic electroluminescent device and a preparation method thereof Effective date of registration: 20201221 Granted publication date: 20170929 Pledgee: Xin Xin Finance Leasing Co.,Ltd. Pledgor: KunShan Go-Visionox Opto-Electronics Co.,Ltd. Registration number: Y2020980009652 |
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