CN102184938B - Organic electroluminescent device and manufacturing method thereof - Google Patents
Organic electroluminescent device and manufacturing method thereof Download PDFInfo
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Abstract
The invention relates to a colorized organic electroluminescent device. The colorized organic electroluminescent device comprises a substrate, a first electrode, a second electrode, and an organic functional layer arranged between the first electrode and the second electrode; and the organic functional layer at least comprises a red sub-pixel organic functional area, a green sub-pixel organic functional area and a blue sub-pixel organic functional area, wherein the at least one sub-pixel organic functional area comprises a phosphorescent luminous layer which is a non-blue luminous layer, and a blue luminous layer which covers the phosphorescent luminous layer. The invention also relates to a manufacturing method of the colorized organic electroluminescent device, wherein the phosphorescent luminous layer is manufactured on a phosphorescent sub-pixel part by using a precise mask, the blue luminous layer is manufactured by using a third open mask, and the blue luminous layer covers phosphorescent sub-pixels and blue sub-pixels.
Description
Technical field
The present invention relates to organic electroluminescence device, especially color organic electroluminescence device, and the preparation method of this organic electroluminescence device.
Background technology
In recent years, Organic Light Emitting Diode (OLED) display receives very big concern in flat display field, show boundless application prospect, this is because it is compared with traditional liquid crystal display, possesses a lot of particular advantages, as, self-luminous, low-power consumption, wide viewing angle, fast response time, wide colour gamut, can flexible display etc. be prepared into.The method that OLED realizes colorize is a lot, comprises RGB trichroism, look transformation approach, colored filter method, microresonator adjustment method etc., and wherein RGB trichroism is method the most ripe at present, also use by domestic and international manufacturer.Its preparation process requirement, open mask (open mask) is needed when the layer that evaporation shares, such as, hole injection layer (HIL), hole transmission layer (HTL), electron transfer layer (ETL) material that evaporation shares, and evaporation metal electrode.In addition, when the RGB luminescent layer of evaporation non-common, need three exactitude positions, also need three precision mask (shadow mask).Along with the more and more higher requirement to display picture element resolution, higher challenge be it is also proposed to the alignment system of OLED evaporated device and precision mask, equipment and the high accuracy mask of high accuracy alignment system are all very expensive, considerably increase the cost of manufacture of OLED.
Summary of the invention
The object of the invention is to propose a kind of organic electroluminescence device, it has low cost of manufacture and the high advantage of luminous efficiency.
According to an aspect of the present invention, the invention provides a kind of color organic electroluminescence device, comprising: substrate; First electrode; Second electrode; And the organic function layer be arranged between this first and second electrode, this organic function layer at least comprises red, green, blue three kinds of sub-pix organic functions districts, wherein at least one sub-pix organic functions district comprises: phosphorescence luminescent layer, and this phosphorescence luminescent layer is non-blue light-emitting; And blue light-emitting, wherein, this blue light-emitting covers this phosphorescence luminescent layer.
On the other hand, phosphorescence luminescent layer comprises red light luminescent layer or green light emitting layer.
On the other hand, blue light-emitting comprises blue phosphor luminescent layer.
On the other hand, organic electroluminescence device is the organic electroluminescence device of end luminescence.
On the other hand, the first electrode is anode, and the second electrode is negative electrode.
On the other hand, organic function layer comprises: hole injection layer/hole transmission layer/phosphorescence luminescent layer/blue phosphor layer/electron transfer layer and/or electron injecting layer.
On the other hand, organic function layer comprises: hole injection layer/hole transmission layer/blue phosphor layer/phosphorescence luminescent layer/electron transfer layer and/or electron injecting layer.
On the other hand, this organic electroluminescence device is the organic electroluminescence device of top luminescence.
On the other hand, the first electrode is reflection anode, and the second electrode is transmissive cathode.
On the other hand, organic function layer comprises: hole injection layer/hole transmission layer/phosphorescence luminescent layer/blue phosphor luminescent layer/electron transfer layer and/or electron injecting layer.
On the other hand, organic function layer comprises: hole injection layer/hole transmission layer/blue phosphor luminescent layer/phosphorescence luminescent layer/electron transfer layer and/or electron injecting layer.
On the other hand, between blue phosphor luminescent layer and phosphorescence luminescent layer, there is barrier layer.
On the other hand, the triplet of the material on barrier layer is more than or equal to the triplet of the material of phosphorescence luminescent layer.
On the other hand, the material on barrier layer is electronic property or hole character.
On the other hand, the character of blue light-emitting is electronic property or hole character.
According to a further aspect in the invention, the invention provides a kind of method preparing color organic electroluminescence device, at least comprise step: a) on substrate, prepare anode layer; B) prepare insulating barrier on the anode layer, form multiple light emitting pixel, in each pixel, comprise phosphorescence sub-pix and blue light sub-pix; C) aforesaid substrate is sent to the plasma treatment chamber of evaporated device, carries out plasma treatment; D) by aforesaid substrate, the preparation that the first open mask carries out hole injection layer is loaded onto; E) by aforesaid substrate, the preparation that the second open mask carries out hole transmission layer is loaded onto; F) utilize precision mask to carry out the preparation of phosphorescence luminescent layer in phosphorescence sub-pix part, and utilize the 3rd open mask to be prepared blue light-emitting, this blue light-emitting covers phosphorescence sub-pix and blue light sub-pix; G) by aforesaid substrate, the preparation that the 4th open mask carries out electron transfer layer is loaded onto; H) by aforesaid substrate, the preparation that the 5th open mask carries out negative electrode is loaded onto; I) encapsulate.
On the other hand, phosphorescence sub-pix comprises ruddiness sub-pix and green glow sub-pix.
On the other hand, the first precision mask is utilized to prepare red light luminescent layer, the corresponding ruddiness sub-pix of openwork part of this first precision mask; The second precision mask is utilized to prepare green light emitting layer, the corresponding green glow sub-pix of openwork part of this second precision mask.
On the other hand, the method is also included in the step preparing barrier layer between phosphorescence luminescent layer and blue light-emitting.
On the other hand, the triplet of the material on barrier layer is more than or equal to the triplet of the material of described phosphorescence luminescent layer.
Accompanying drawing explanation
Fig. 1 schematically shows the structure chart of the color organic electroluminescence device of prior art;
Fig. 2 schematically shows the preparation technology of the device of Fig. 1;
Fig. 3 schematically shows the structure chart according to color organic electroluminescence device of the present invention;
Fig. 4 schematically shows the preparation technology of the device of Fig. 3.
Reference numeral
01 ' substrate
02 ' anode
03 ' negative electrode
04 ' hole injection layer
05 ' hole transmission layer
06 ' luminescent layer
08 ' electron transfer layer
101 ' precision mask
102 ' precision mask
103 ' precision mask
01 substrate
02 anode
03 negative electrode
04 hole injection layer
05 hole transmission layer
06 phosphorescence luminescent layer
07 blue light-emitting
08 ' electron transfer layer
101 precision mask
102 precision mask
103 open masks
104 precision mask
105 open masks
Embodiment
First illustrate that the structural formula of the dominant chemical of the application is as follows:
The general structure of organic electroluminescence device of the present invention
As shown in Figure 3, comprising substrate 01, this substrate 01 can be glass or flexible substrate to the basic structure of organic electroluminescence device of the present invention, and flexible substrate adopts a kind of material in polyesters, polyamide-based compound; Anode layer 02, can adopt inorganic material or organic conductive polymer, preferably adopts inorganic material tin indium oxide (being called for short ITO); Cathode layer 03, generally adopts the alloy of metal that the work functions such as lithium, calcium, strontium, aluminium, indium are lower or they and copper, gold, silver, or the electrode layer that metal and metal fluoride are alternately formed, and is preferably LiF layer, Al layer according to this.
Organic electroluminescence device in Fig. 3 also comprises organic function layer, and this organic function layer comprises red, green, blue three kinds of sub-pix organic functions districts.Wherein, ruddiness and green glow sub-pix organic functions district comprise hole injection layer (HIL) 04, hole transmission layer (HTL) 05, phosphorescence luminescent layer 06 (this phosphorescence luminescent layer can comprise Yellow light emitting floor (corresponding to non-blue light sub-pix part), or comprises red light luminescent layer and green light emitting layer (corresponding respectively to ruddiness sub-pix and the green glow sub-pix part of pixel)), the blue light-emitting 07 (can be fluorescent light-emitting layer) of covering red, green and blue sub-pix part, electron transfer layer (ETL) 08.Wherein, blue light sub-pix organic functions district comprises hole injection layer (HIL) 04, hole transmission layer (HTL) 05, blue light-emitting 07, electron transfer layer (ETL) 08, and blue light-emitting 07 covers red, green and blue sub-pix part, it can be fluorescent light-emitting layer.There are common hole injection layer (HIL) 04, hole transmission layer (HTL) 05, blue light-emitting 07, electron transfer layer (ETL) 08 in ruddiness, green glow sub-pix organic functions district and blue light sub-pix organic functions district.Although not shown, electron injecting layer EIL can also be comprised.
The structure corresponding to ruddiness sub-pix and green glow sub-pix organic functions district has been shown in Fig. 3, wherein, phosphorescence luminescent layer 06 is near anode layer 02 side, blue light-emitting 07 is near cathode layer 03 side, require that blue light-emitting is electronic property in this case, that is, the electron mobility of blue light-emitting is greater than hole mobility, preferably, an order of magnitude is at least greater than.In another embodiment, phosphorescence luminescent layer is near negative electrode side, and blue light-emitting is near anode side, require that blue light-emitting is hole character in this case, that is, the hole mobility of blue light-emitting is greater than electron mobility, preferably, an order of magnitude is at least greater than.
When phosphorescence luminescent layer 06 directly contacts with blue light-emitting 07, and phosphorescence luminescent layer 06 is near anode side, and blue light-emitting 07 is when negative electrode side, and in order to realize higher efficiency, preferably, the material of main part of this phosphorescence luminescent layer is the material of electronic property.Preferred, the HOMO energy level of blue light-emitting is lower than the HOMO energy level of phosphorescence luminescent layer.
Phosphorescence luminescent layer 06 also can not directly contact with blue light-emitting 07, there is barrier layer BL between phosphorescence luminescent layer and blue light-emitting, the electron mobility on this barrier layer is greater than hole mobility, and the triplet of the material on barrier layer is more than or equal to the triplet of phosphorescence luminescent layer material of main part.Due to the existence on independent barrier layer, the HOMO energy level of the material of blue light-emitting is not limited, just can realize higher device efficiency.
Below emphasis is set forth for non-blue light sub-pix organic functions plot structure, enumerate luminous two types of end luminescence and top respectively, and introduce its preparation method.
The concrete structure of the organic electroluminescence device of end emission type and preparation method
The concrete structure of the organic electroluminescence device of end emission type is: anode/hole injection layer/hole transmission layer/phosphorescence luminescent layer/blue phosphor luminescent layer/electron transfer layer and/or electron injecting layer/negative electrode; Or anode/hole injection layer/hole transmission layer/blue phosphor luminescent layer/phosphorescence luminescent layer/electron transfer layer and/or electron injecting layer/negative electrode.
Wherein phosphorescence luminescent layer is non-blue light-emitting, is preferably the phosphorescence luminescent layer of ruddiness, orange red, gold-tinted, green-yellow light, green glow.
When there is no barrier layer between phosphorescent layer and blue phosphor layer, require:
When phosphorescence luminescent layer is near anode side, blue phosphor luminescent layer is when negative electrode side, and the electron mobility of the material of main part of phosphorescence luminescent layer is greater than hole mobility, preferably, more than at least one order of magnitude.When phosphorescence luminescent layer is near negative electrode side, blue phosphor luminescent layer is when anode side, and the hole mobility of phosphorescence luminescent layer is greater than electron mobility, preferably, more than at least one order of magnitude.
When there is barrier layer between phosphorescence luminescent layer and blue phosphor luminescent layer, require:
When phosphorescence luminescent layer is near anode side, blue phosphor luminescent layer is when negative electrode side, and the electron mobility on barrier layer is greater than hole mobility, preferably, more than at least one order of magnitude; When phosphorescence luminescent layer is near negative electrode side, blue phosphor luminescent layer is when anode side, and the hole mobility on barrier layer is greater than electron mobility, preferably, more than at least one order of magnitude, and the triplet of barrier material is more than or equal to the triplet of phosphorescent layer material of main part.
The transmitting of blue phosphor is not had in the electroluminescent spectrum of above-mentioned device architecture.
The material of main part of the phosphorescence luminescent layer in above-mentioned device architecture can be a kind of material, also can be two or more material, the dyestuff of phosphorescence luminescent layer also can be one or both or two or more material, and its barrier layer also can be a kind of material or two or more material.
Comparative example 1 and embodiment 1:
The device architecture of table 1-1 comparative example 1 and embodiment 1
The device architecture that the technical program adopts is:
Anode/hole injection layer/hole transmission layer/phosphorescence luminescent layer/electron transfer layer/electron injecting layer/negative electrode (comparative example 1-1)
Anode/hole injection layer/hole transmission layer/phosphorescence luminescent layer/blue phosphor luminescent layer/electron transfer layer/electron injecting layer/negative electrode (embodiment 1-1)
Anode/hole injection layer/hole transmission layer/phosphorescence luminescent layer/barrier layer/blue phosphor luminescent layer/electron transfer layer/electron injecting layer/negative electrode (embodiment 1-2 to 1-5)
The preparation process of embodiment 1-2 is as follows:
1. utilize the ultrasonic detergent that boils and the ultrasonic method of deionized water to clean glass substrate 01, and dry under being placed on infrared lamp.Glass sputters one deck ITO as anode 02, thickness is 180nm;
2. the above-mentioned glass substrate with anode is placed in vacuum chamber, is evacuated to 1 × 10
-5pa, the method that above-mentioned anode tunic adopts double source to steam altogether continues evaporation one deck hole injection layer 04, and speed is 0.1nm/s, and evaporation thickness is 150nm;
3., on above-mentioned hole injection layer film, continue evaporation one deck hole transmission layer 05, speed is 0.1nm/s, and evaporation thickness is 20nm;
4. the method adopting double source to steam altogether again, carries out the evaporation of phosphorescence luminescent layer 06;
5., on above-mentioned phosphorescence luminescent layer, evaporation one deck barrier layer is continued;
6. the method adopting double source to steam altogether again, carries out the evaporation of blue phosphor luminescent layer 07;
7., on blue phosphor luminescent layer, evaporation one deck electron transport material is continued as electron transfer layer 08;
8. last, on above-mentioned luminescent layer, evaporation LiF layer and Al layer are as the cathode layer 03 of device successively, and wherein the evaporation rate of LiF layer is 0.01 ~ 0.02nm/s, and thickness is the evaporation rate of 0.7nm, Al layer is 2.0nm/s, and thickness is 150nm.
The device performance of table 1-2 comparative example 1 and embodiment 1
Comparative example 1-1 is independent gold-tinted device, only has the transmitting of dyestuff YD-1 in the electroluminescent spectrum of device.Comparative example 1-1, as the normal component of simple gold-tinted device, is used for contrasting with all the other devices.In embodiment 1-1, after yellow phosphor layer, directly add blue phosphor layer BH-1:BD-1, in the spectrum of device, still only have the transmitting of gold-tinted, there is no the transmitting of blue light, chromaticity coordinates and comparative example basically identical.This is because: the character of the material of main part of yellow phosphor layer is electronic property, its electron mobility is greater than hole mobility, and the material of main part of blu-ray layer is also electronic property, so its recombination region is partial in the region of close anode side in gold-tinted layer, and gold-tinted layer and hole transport bed boundary, at gold-tinted layer and blu-ray layer interface, there is no effective compound, so there is no the transmitting of blue light in the spectrum of device, only has the transmitting of simple gold-tinted.And owing to adding the extra blu-ray layer of one deck, hole and the electronics of device inside balance more, and the efficiency of device is improved.
In embodiment 1-2, between gold-tinted layer and blu-ray layer, add the barrier layer Bphen of the electronic property of 5nm, in the spectrum of device, also there is no the transmitting of blue light, consistent with the spectrum of independent gold-tinted device comparative example 1-1.Adding of the barrier layer of very thin 5nm, still do not change the chromaticity coordinates of device, and efficiency obtains further raising, this is because: because the character of barrier layer and yellow phosphor layer main body material is all electronic property, so now, its recombination region is still positioned at the region of gold-tinted layer near anode side, and gold-tinted layer and hole transport bed boundary, at the interface of barrier layer and blu-ray layer, there is no effective compound, so blue light does not just realize luminescence, ensure that the colorimetric purity of gold-tinted.
Embodiment 1-3, Bphen is replaced by TPBI, and gold-tinted layer main body material is replaced by CBP, the character that TPBI has is the same with Bphen, that is, high electron mobility and high triplet, result reaches same effect, only have the transmitting of gold-tinted in the spectrum of device, there is no the transmitting of blue light.But with embodiment 1-2 unlike, now because the character of gold-tinted layer main body material is bipolarity, so its recombination region is positioned at gold-tinted layer, and the interface on gold-tinted layer and barrier layer.Embodiment 1-4 employs the doped forms of Bphen and TPBI, still can reach same effect.As long as this illustrates that barrier layer possesses electronic property, just can be applied in this scheme, the wide variety of material.
After embodiment 1-5 is mixed with the TPBI of concentration 40% in CBP, compared with embodiment 1-4, change the material on barrier layer, but as long as the character ensureing barrier layer is electronic property, still can reach the same effect of embodiment 1-4.
To sum up illustrate, after phosphorescence luminescent layer, cover one deck blue phosphor layer, the efficiency of device can be made higher, and the chromaticity coordinates of device is substantially constant.The above results is realized by the adjustment of recombination region.Preferably, add one deck barrier layer between phosphorescence luminescent layer and blue phosphor layer, the amplitude of improved efficiency is larger, and effect is more excellent.
Further, when no matter being blue phosphor luminescent layer covering phosphorescent layer, or when phosphorescent layer covers blue phosphor luminescent layer, compared with only having separately the device of phosphorescence luminescent layer, efficiency all can get a promotion, and chromaticity coordinates all can be consistent.
Why preferably between blue phosphor luminescent layer and phosphorescent layer, add barrier layer, be because:
The barrier layer having one deck independent between phosphorescent layer and blue phosphor layer, this barrier layer possesses high triplet, its triplet is higher than the triplet of fluorescence coating and phosphorescent layer, thus prevent the triplet energy state of phosphorescent layer material to be delivered on blue phosphor layer, avoid the waste of triplet excitons energy, improve device efficiency.In addition, due to the effect of independent HBL layer, recombination region can be positioned at EML/HBL interface, so also can avoid exciton compound near HTL, thus improve device efficiency further, and also be improved effect to the stability of device.Moreover the balance of charge carrier, can be regulated by barrier layer thickness, can also be regulated by the size of barrier material carrier mobility, so charge carrier is more prone to balance, the efficiency of device is also made to get a promotion.
Comparative example 2 and embodiment 2
Comparative example 2-1, and the preparation process of embodiment 2-1 to 2-4 is identical with the preparation process of embodiment 1-2, except changing gold-tinted layer double source evaporation into three source evaporations.
Embodiment 2-1 to 2-4, its mechanism and implementation result and embodiment 1-1 to 1-5, basically identical.
Can be illustrated by comparative example 2 and embodiment 2, the technical program is not only applicable to single main body device, is applicable to two main body device yet.
The device architecture of table 2-1 comparative example 2 and embodiment 2
The device performance of table 2-2 comparative example 2 and embodiment 2
Comparative example 3 and embodiment 3
Comparative example 3-1, and the preparation process of embodiment 3-1 to 3-3 is identical with the preparation process of embodiment 1-2, except changing gold-tinted layer material into green glow layer material.
Embodiment 3-1 to 3-3, its mechanism and implementation result and embodiment 1-1 to 1-5, basically identical.
Can be illustrated by comparative example 3 and embodiment 3, the technical program is not only applicable to yellow device, is applicable to other color, as green device yet.
The device architecture of table 3-1 comparative example 3 and embodiment 3
The device performance of table 3-2 comparative example 3 and embodiment 3
Comparative example 4 and embodiment 4
Comparative example 4-1, and the preparation process of embodiment 4-1 to 4-3 is identical with the preparation process of embodiment 1-2, except changing gold-tinted layer material into ruddiness layer material.
Embodiment 4-1 to 4-3, its mechanism and implementation result and embodiment 1-1 to 1-5, basically identical.
Can be illustrated by comparative example 4 and embodiment 4, the technical program is not only applicable to yellow, green devices, is applicable to other color, as red device yet.
The device architecture of table 4-1 comparative example 4 and embodiment 4
The device performance of table 4-2 comparative example 4 and embodiment 4
Comparative example 5 and embodiment 5
Comparative example 5-1, and the preparation process of embodiment 5-1 to 5-3 is identical with the preparation process of embodiment 1-2, except gold-tinted layer to be changed into the structure of green glow sensitization ruddiness by single gold-tinted dyestuff.
Embodiment 5-1 to 5-3, its mechanism and implementation result and embodiment 1-1 to 1-5, basically identical.
Can be illustrated by comparative example 5 and embodiment 5, the technical program is not only applicable to the monochrome devices of the homogencous dyes structures such as yellow, green, redness, is applicable to the device of sensitization structure yet.
The device architecture of table 5-1 comparative example 5 and embodiment 5
The device performance of table 5-2 comparative example 5 and embodiment 5
Be directed to concrete comparative example and the embodiment of top-illuminating OLED
In described top illuminating device structure, the feature of reflection anode is reflectivity > 90%, is preferred with reflectivity > 95%.Material therefor comprises silver (Ag) and alloy, aluminium (Al) and alloy thereof, such as silver (Ag), silver and the plumbous alloy (Al:Nd) of alloy (Ag:Pb), aluminium and neodymium, the alloy (Ag:Pt:Cu) etc. of silver-colored platinoid.When using Ag and alloy thereof as reflector, one deck ITO can be comprised between reflector and substrate.
In described top illuminating device structure, the light transmittance of negative electrode at 30%-90%, preferred 50%-80%.Under the condition of this light transmittance, optical resonator can either be realized, the emergent light efficiency that can obtain again.Material used is the metal that extinction coefficient is less than 4.5 in full band range, within blue wave band scope, preferably extinction coefficient is less than 2.75, and within green light band scope, preferably extinction coefficient is less than 3.5, and within red spectral band scope, preferably extinction coefficient is less than 4.2.Meet the material of above-mentioned extinction coefficient, can avoid utilizing emitted light by time loss.Select on the negative electrode of above-mentioned material and can also comprise one deck antireflection layer, the material of its refractive index > 1.6, preferred index > 1.8, emphasizes to strengthen transmitted light, and regulates spectrum.
The device architecture of table 6-1 comparative example 6 and embodiment 6
The device performance of table 6-2 comparative example 6 and embodiment 6
| Brightness (cd/m2) | Voltage (V) | Current efficiency (cd/A) | Chromaticity coordinates (x, y) | |
| Comparative example 6 | 1000 | 3.56 | 13.7 | (0.66，0.33) |
| Embodiment 6 | 1000 | 3.6 | 15.6 | (0.66，0.33) |
Comparative example 6 and embodiment 6 illustrate, the technical program is applicable to ruddiness top ray structure, and efficiency is improved, and colourity can remain unchanged.
The device architecture of table 7-1 comparative example 7 and embodiment 7
The device performance of table 7-2 comparative example 7 and embodiment 7
| Brightness (cd/m2) | Voltage (V) | Current efficiency (cd/A) | Chromaticity coordinates (x, y) | |
| Comparative example 7 | 1000 | 3.24 | 74 | (0.29，0.67) |
| Embodiment 7 | 1000 | 3.15 | 82 | (0.27，0.71) |
Comparative example 7 and embodiment 7 illustrate, the technical program is applicable to green glow top ray structure, and efficiency is improved, and colourity can regulate purer, this prepares organic electroluminescent LED (AMOLED) for top ray structure, can improve colour gamut, the color that whole AMOLED display screen is shown is purer.
The device architecture of table 8-1 comparative example 8 and embodiment 8-9
The device performance of table 8-2 comparative example 8 and embodiment 8-9
| Brightness (cd/m2) | Voltage (V) | Current efficiency (cd/A) | Chromaticity coordinates (x, y) | |
| Comparative example 8 | 1000 | 3.05 | 65 | (0.52，0.47) |
| Embodiment 8 | 1000 | 3.1 | 14 | (0.65，0.33) |
| Embodiment 9 | 1000 | 3.12 | 71 | (0.30，0.67) |
Comparative example 8 and embodiment 8 illustrate, the technical program is applicable to the top ray structure of green glow sensitization ruddiness, not only has the crest of ruddiness in the spectrum of device, also has the crest of green glow, when regulating light path, this structure can be used, obtain simple ruddiness or green glow respectively.When this is for preparation top ray structure color screen, can aperture opening ratio be increased, Simplified flowsheet, save cost.
Above comparative example and embodiment are the execution mode that the present invention can take.
Describe a kind of preparation technology of organic electroluminescence device of the present invention below in conjunction with Fig. 4, in order to clear, in figure, illustrate only the evaporation schematic diagram carrying out ruddiness, green glow and blue light-emitting.This preparation technology comprises step.
1) on substrate 01, ito thin film is prepared;
2) ito anode figure is etched;
3) ITO prepares insulating barrier, form multiple light emitting pixel, in each pixel, have red, green, blue three sub-pixs;
4) aforesaid substrate is sent to the plasma treatment chamber of evaporated device, carries out plasma treatment;
5) by aforesaid substrate, load onto open mask and be sent to first organic chamber, carry out the evaporation of HIL layer;
6) by aforesaid substrate, load onto open mask and be sent to second organic chamber, carry out the evaporation of htl layer;
7) by aforesaid substrate, load onto precision mask 101, be sent to the 3rd organic chamber, then carry out exactitude position, the openwork part of precision mask 101 is just in time covered the red sub-pixel part of substrate, then carry out red light luminescent layer evaporation;
8) by aforesaid substrate, load onto precision mask 102, be sent to the 4th organic chamber, then carry out exactitude position, the openwork part of precision mask 102 is just in time covered the green sub-pixels part of substrate, then carry out green light emitting layer evaporation;
By 9) by aforesaid substrate, load onto open mask 103, be sent to the 5th organic chamber, carry out the evaporation of blue light-emitting, the evaporation of this layer does not need precision mask;
10) by aforesaid substrate, load onto open mask and be sent to the 6th organic chamber, carry out the evaporation of ETL layer;
11) by aforesaid substrate, load onto the open mask of electrode and be sent to electrode chambers, carry out the evaporation of negative electrode;
12) by substrate complete for above-mentioned evaporation, be sent to glove box, encapsulate.
After above-mentioned steps, complete the preparation process according to a kind of organic electroluminescence device of the present invention.
When organic electroluminescence device has barrier layer, can in above-mentioned steps 7) and 8) in carry out the evaporation on barrier layer.
Claims (15)
1. a color organic electroluminescence device, comprising:
Substrate;
First electrode;
Second electrode; With
Be arranged at the organic function layer between this first and second electrode, this organic function layer at least comprises red, green, blue three kinds of sub-pix organic functions districts, and wherein at least one sub-pix organic functions district comprises:
Phosphorescence luminescent layer, this phosphorescence luminescent layer is non-blue light-emitting; With
Blue light-emitting, this blue light-emitting is blue phosphor luminescent layer,
Wherein, this blue phosphor luminescent layer covers this phosphorescence luminescent layer,
Between described blue phosphor luminescent layer and phosphorescence luminescent layer, there is barrier layer,
The triplet of the material on described barrier layer is more than or equal to the triplet of the material of described phosphorescence luminescent layer.
2. color organic electroluminescence device as claimed in claim 1, wherein, described phosphorescence luminescent layer comprises red light luminescent layer or green light emitting layer.
3. the color organic electroluminescence device according to any one of claim 1-2, wherein, described organic electroluminescence device is the organic electroluminescence device of end luminescence.
4. color organic electroluminescence device as claimed in claim 3, wherein, described first electrode is anode, and described second electrode is negative electrode.
5. color organic electroluminescence device as claimed in claim 4, wherein, described at least one sub-pix organic functions district comprises:
Hole injection layer/hole transmission layer/phosphorescence luminescent layer/barrier layer/blue phosphor luminescent layer/electron transfer layer and/or electron injecting layer.
6. color organic electroluminescence device as claimed in claim 4, wherein, described at least one sub-pix organic functions district comprises:
Hole injection layer/hole transmission layer/blue phosphor luminescent layer/barrier layer/phosphorescence luminescent layer/electron transfer layer and/or electron injecting layer.
7. the color organic electroluminescence device according to any one of claim 1-2, wherein, this organic electroluminescence device is the organic electroluminescence device of top luminescence.
8. color organic electroluminescence device as claimed in claim 7, wherein, described first electrode is reflection anode, and described second electrode is transmissive cathode.
9. color organic electroluminescence device as claimed in claim 8, wherein, described at least one sub-pix organic functions district comprises:
Hole injection layer/hole transmission layer/phosphorescence luminescent layer/barrier layer/blue phosphor luminescent layer/electron transfer layer and/or electron injecting layer.
10. color organic electroluminescence device as claimed in claim 8, wherein, the organic functions district of described at least one sub-pix comprises:
Hole injection layer/hole transmission layer/blue phosphor luminescent layer/barrier layer/phosphorescence luminescent layer/electron transfer layer and/or electron injecting layer.
11. color organic electroluminescence devices as claimed in claim 1, wherein, the material on described barrier layer is electronic property or hole character.
12. color organic electroluminescence devices as claimed in claim 1, wherein, the character of described blue light-emitting is electronic property or hole character.
13. 1 kinds of methods preparing color organic electroluminescence device, at least comprise step:
A) on substrate, anode layer is prepared;
B) prepare insulating barrier on the anode layer, form multiple light emitting pixel, in each pixel, comprise phosphorescence sub-pix and blue light sub-pix;
C) aforesaid substrate is sent to the plasma treatment chamber of evaporated device, carries out plasma treatment;
D) by aforesaid substrate, the preparation that the first open mask carries out hole injection layer is loaded onto;
E) by aforesaid substrate, the preparation that the second open mask carries out hole transmission layer is loaded onto;
F) precision mask is utilized to carry out the preparation of phosphorescence luminescent layer in phosphorescence sub-pix part,
G) on above-mentioned phosphorescence luminescent layer, continue evaporation one deck barrier layer, the triplet of this barrier material is more than or equal to the triplet of the material of described phosphorescence luminescent layer;
H) utilize the 3rd open mask to be prepared blue light-emitting, this blue light-emitting covers phosphorescence sub-pix and blue light sub-pix;
I) by aforesaid substrate, the preparation that the 4th open mask carries out electron transfer layer is loaded onto;
J) by aforesaid substrate, the preparation that the 5th open mask carries out negative electrode is loaded onto;
K) encapsulate.
14. methods as claimed in claim 13, wherein, described phosphorescence sub-pix comprises ruddiness sub-pix and green glow sub-pix.
15. methods as claimed in claim 14, wherein, utilize the first precision mask to prepare red light luminescent layer, the corresponding ruddiness sub-pix of openwork part of this first precision mask; The second precision mask is utilized to prepare green light emitting layer, the corresponding green glow sub-pix of openwork part of this second precision mask.
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| CN102769025A (en) * | 2012-08-06 | 2012-11-07 | 深圳市华星光电技术有限公司 | OLED (organic light emitting diode) |
| KR20240033152A (en) | 2014-05-30 | 2024-03-12 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | Light-emitting device, display device, and electronic device |
| DE102014008722B4 (en) * | 2014-06-18 | 2024-08-22 | Merck Patent Gmbh | Compositions for electronic devices, formulation containing them, use of the composition, use of the formulation and organic electronic device containing the composition |
| CN107221548A (en) * | 2016-03-22 | 2017-09-29 | 上海和辉光电有限公司 | OLED display panel, intelligent display glass device and preparation method |
| CN107785491B (en) * | 2016-08-26 | 2019-12-03 | 昆山工研院新型平板显示技术中心有限公司 | Organic electroluminescence device |
| CN106601919A (en) * | 2016-12-09 | 2017-04-26 | Tcl集团股份有限公司 | Hybrid light emitting device, display panel and display device |
| CN109216411B (en) * | 2017-06-30 | 2021-03-23 | 敦泰电子股份有限公司 | Organic light emitting diode panel and method of manufacturing the same |
| CN107623074A (en) * | 2017-09-18 | 2018-01-23 | 深圳市华星光电半导体显示技术有限公司 | A kind of OLED and the method for preparing the liquid material to be sprayed for the device |
| CN109037461B (en) * | 2018-07-13 | 2021-12-14 | 京东方科技集团股份有限公司 | Blue-light organic light-emitting diode, display substrate and display device |
| CN109671854B (en) | 2018-12-05 | 2020-09-08 | 武汉华星光电半导体显示技术有限公司 | Display device, organic electroluminescent display device and method of manufacturing the same |
| CN109599507A (en) * | 2018-12-13 | 2019-04-09 | 武汉华星光电半导体显示技术有限公司 | The preparation method of display |
| CN111584471B (en) * | 2020-05-12 | 2022-08-16 | 深圳雷曼光电科技股份有限公司 | Display screen and manufacturing method thereof |
| CN112670433A (en) * | 2021-01-30 | 2021-04-16 | 浙江宏禧科技有限公司 | Method for preparing silicon-based OLED microdisplay anode by mask plate technology |
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