CN101908531A - Multilayer electroluminescent device - Google Patents
Multilayer electroluminescent device Download PDFInfo
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- CN101908531A CN101908531A CN2009100849807A CN200910084980A CN101908531A CN 101908531 A CN101908531 A CN 101908531A CN 2009100849807 A CN2009100849807 A CN 2009100849807A CN 200910084980 A CN200910084980 A CN 200910084980A CN 101908531 A CN101908531 A CN 101908531A
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Abstract
The invention relates to a multilayer OLED (Organic Light Emitting Diode) device and provides an individual luminous double-layer or multilayer OLED device, comprising a transparent base board and two or a plurality of organic electroluminescent components, wherein the organic electroluminescent components are respectively arranged on the upper surface or the lower surface of the base board, and the organic electroluminescent components positioned in light-emitting directions are transparent components. In the invention, the transparent components can singly emit light; when the components have the same light-emitting color, illumination can be overlapped mutually and is higher than the illumination of one light-emitting component; when the components have different light-emitting colors, other colors of light can be mixed.
Description
Technical field
The present invention relates to field of optoelectronic devices, relate in particular to a kind of multilayer OLED device.
Technical background
Organic electroluminescence device (OLED) has lot of advantages and possesses extremely strong competitiveness as a kind of new display spare and existing main flat-panel monitor liquid crystalline phase ratio.The general structure of organic electroluminescence device comprises successively: matrix, anode, organic layer, negative electrode, organic function layer comprises emission layer (EML) again, can also comprise hole injection layer (HIL) and/or hole transmission layer (HTL) between anode and emission layer, and electron transfer layer between emission layer and negative electrode (ETL) and/or electron injecting layer (EIL), can also comprise hole blocking layer (HBL) between emission layer and electron transfer layer etc.
Present OLED product substantially all is to adopt single el light emitting device preparation to be used for common light emitting display, if OLED can adopt the independent respectively luminous back of the light-emitting device of two drive to realize the stack of light, then can improve the practical value of OLED display products greatly.
Because of its complex structural designs, and there are a lot of technological problemses in the OLED device of the laminated construction of available technology adopting in each device connection procedure, and preparation technology is quite complicated, thereby cost is higher.
Therefore, research and develop a kind of lighting function that can superpose, the New O LED device that does not increase preparation cost again has very big meaning.
Technology contents
The objective of the invention is to overcome the defective of above-mentioned prior art, provide a kind of and can realize the multilayer OLED device that superposes luminous, provide simultaneously that a kind of cost is low, the simple preparation method of technology.
For achieving the above object, technical scheme of the present invention is:
Propose a kind of unidirection luminous double-deck OLED device, comprising: a transparency carrier, two surfaces of this substrate all prepare the transparent conductive film layer; First organic electroluminescence device is arranged at the upper surface of this substrate; Second organic electroluminescence device is arranged at the lower surface of this substrate; The first above-mentioned organic electroluminescence device is a transparent devices.
The material of above-mentioned transparency carrier is glass or plastics.
Above-mentioned two organic electroluminescence devices are respectively by two driving device controls.
Above-mentioned two organic electroluminescence devices encapsulate respectively.First organic electroluminescence device adopts the transparent encapsulating structure encapsulation.
Above-mentioned two organic electroluminescence devices are all luminous to the upper surface direction of substrate, and corresponding second electrode of first electrode with being positioned at upper surface of base plate that first organic electroluminescence device is adopted is a transparency electrode; Corresponding second electrode of first electrode with being positioned at base lower surface that second organic electroluminescence device is adopted is a reflective electrode.
Second electrode material that first organic electroluminescence device among the above-mentioned double-deck OLED is adopted is Ag or indium tin oxide, and second electrode material that second organic electroluminescence device is adopted is that opaque electric conducting material is AL, Mg, Ag.
The glow color of above-mentioned two organic electroluminescence devices is identical.The glow color difference of perhaps above-mentioned two organic electroluminescence devices, the light of these two kinds of colors can form the light that is different from these two colors that organic electroluminescence device is sent out after mixing.
This double-deck OLED device of the present invention can include a plurality of luminescent layers with having at least an employing to pile up the device of junction type in first organic electroluminescence device or second organic electroluminescence device in this stacked structure.
The present invention is a kind of unidirection luminous multilayer OLED device simultaneously, comprising: a transparency carrier, and two surfaces of this substrate all prepare the transparent conductive film layer; First organic electroluminescence device is arranged at the lower surface of this substrate; Second organic electroluminescence device is arranged at the upper surface of this substrate; The 3rd organic electroluminescence device is on the stack setting and second organic electroluminescence device; Above-mentioned second organic electroluminescence device and the 3rd organic electroluminescence device are transparent devices.
Above-mentioned three organic electroluminescence devices are respectively by three driving device controls.
Above-mentioned three organic electroluminescence devices are all luminous to the upper surface direction of substrate, and corresponding second electrode of first electrode with being positioned at upper surface of base plate that second organic electroluminescence device is adopted is a transparency electrode; Two electrodes that the 3rd organic electroluminescence device is adopted are transparency electrode; Corresponding second electrode of first electrode with being positioned at base lower surface that first organic electroluminescence device is adopted is a reflective electrode.
The beneficial effect of multilayer device of the present invention is:
(1) two or three luminescent devices can be luminous separately, and when each device glow color was identical, the brightness mutual superposition can realize higher than a luminescent device brightness; When each device glow color not simultaneously, can blend other color light (as a device glow, a device blue light-emitting just can blend white light).
(2) two or three devices can be luminous separately, and luminous zone can control separately, by controlling luminous zone, can realize that different zones sends out the light of different colours, realize polychrome or panchromatic demonstration,, then can become polychromatic source if make light source.
Description of drawings
The structural representation of the bi-layer devices device of Fig. 1 embodiment of the invention 1
Wherein 111 is the light that first organic electroluminescence device sends, and 222 is the light that second organic electroluminescence device sends; 10 is transparency carrier, 11 is first organic electroluminescence device, 12 is the encapsulating structure of first organic electroluminescence device, 13 is the driver part of first organic electroluminescence device, 21 is second organic electroluminescence device, 22 is the encapsulating structure of second organic electroluminescence device, and 23 is driving (contact conductor) parts of second organic electroluminescence device.
The structural representation of the bi-layer devices device of Fig. 2 embodiment of the invention 2
Wherein 333 is the light that first organic electroluminescence device sends, and 222 is the light that second organic electroluminescence device sends;
10 is transparency carrier, 31 is first organic electroluminescence device, 32 is the encapsulating structure of first organic electroluminescence device, 33 is the driver part of first organic electroluminescence device, 21 is second organic electroluminescence device, 22 is the encapsulating structure of second organic electroluminescence device, and 23 is driving (contact conductor) parts of second organic electroluminescence device.
The structural representation of three layer device devices of Fig. 3 embodiment of the invention 3
Wherein 444 is the light that first organic electroluminescence device sends, and 555 is the light that second organic electroluminescence device sends, and 666 is the light that the 3rd organic electroluminescence device sends;
10 is transparency carrier, 41 is first organic electroluminescence device, 42 is the encapsulating structure of first organic electroluminescence device, 43 is the driver part of first organic electroluminescence device, 51 is second organic electroluminescence device, 52 is the encapsulating structure of second organic electroluminescence device, 53 is the driver part of second organic electroluminescence device, 61 is the 3rd organic electroluminescence device, 62 is the encapsulating structure of the 3rd organic electroluminescence device, and 63 is driving (contact conductor) parts of the 3rd organic electroluminescence device.
Embodiment
Multilayer OLED device of the present invention adopts two or more organic electroluminescence devices to be prepared from.
Transparency carrier can be glass or flexible substrate, and flexible substrate adopts a kind of material in polyesters, the polyimides compounds; First electrode layer (anode layer) of organic electroluminescence device, can adopt inorganic material or organic conductive polymer, inorganic material is generally the higher metals of work function such as metal oxides such as ITO, zinc oxide, zinc tin oxide or gold, copper, silver, the optimized ITO that is chosen as, organic conductive polymer are preferably polythiophene/polyvinylbenzenesulfonic acid sodium (hereinafter to be referred as PEDOT: PSS), a kind of material in the polyaniline (hereinafter to be referred as PANI); The second electrode lay (cathode layer, metal level), the general alloy that adopts the lower metal of work functions such as lithium, magnesium, calcium, strontium, aluminium, indium or they and copper, gold, silver, or the electrode layer that alternately forms of metal and metal fluoride, the present invention is preferably Mg:Ag alloy-layer, Ag layer and LiF layer successively, Al layer successively.
Organic light emitting medium mainly includes organic electroluminescent layer (EML), the general small molecule material that adopts, can be fluorescent material, as metal organic complex (as Alq3, Gaq3, Al (Saph-q) or Ga (Saph-q)) compounds, can be doped with dyestuff in this small molecule material, doping content is the 0.01wt%～20wt% of small molecule material, dyestuff is generally aromatic condensed ring class (as rubrene), Coumarins is (as DMQA, C545T) or two pyrans class (as DCJTB, DCM) a kind of material in the compound, perhaps be that anthracene derivative (as ADN) perylene analog derivative is (as 2,5,8, uncle 11-4-Ding Ji perylene (TBPe)) the luminescent layer material also can adopt carbazole derivates as 4,4 '-N, N '-two carbazoles-biphenyl (CBP), polyvinylcarbazole (PVK), but Doping Phosphorus photoinitiator dye in this material are as three (2-phenylpyridine) iridium (Ir (ppy) 3), two (2-phenylpyridine) (acetylacetone,2,4-pentanedione) iridium (Ir (ppy) 2 (acac)), octaethylporphyrin platinum (PtOEP) etc.;
Can also comprise electron transfer layer, hole injection layer and hole transmission layer in the above-mentioned device architecture, electron transfer layer (ETL) adopts oxine aluminium (Alq3) usually; The host material of hole injection layer (HIL) can adopt copper phthalocyanine (CuPc), 4,4 ' 4 " (N-3-aminomethyl phenyl-N-phenyl-amino)-triphenylamine (m-MTDATA), 4-three, 4 ' 4 "-three (N-2-naphthyl-N-phenyl-amino)-triphenylamines (2-TNATA); The host material of hole transmission layer (HTL) can adopt the low molecular material of the arylamine class and the branch polymer same clan, is preferably N, N '-two-(1-naphthyl)-N, N '-diphenyl-1,1 '-xenyl-4,4 '-diamines (NPB);
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Embodiment 1:
In conjunction with Fig. 1 is the structural representation of present embodiment 1, double-deck Organnic electroluminescent device comprises transparency carrier 10, first organic electroluminescence device 11, the encapsulating structure 12 of first organic electroluminescence device, the encapsulating structure 22 of the driving of first organic electroluminescence device (contact conductor) parts 13, the second organic electroluminescence devices 21, the second organic electroluminescence devices, the driving of second organic electroluminescence device (contact conductor) parts 23
It is micromolecule light-emitting diode (OLED) or based on the polymer LED (PLED) of polymer that first organic electroluminescence device 11 and second organic electroluminescence device 21 can independently be selected for use respectively, and the lighting function material in two luminescent devices can independently be selected for use to fluorescent material respectively or be phosphor material.
The shown graphic color of first organic electroluminescence device 11 can be similar and different in the shown graphic color of second organic electroluminescence device 21.
Two organic electroluminescence devices also can be used as the light source display device simultaneously.Two organic electroluminescence devices also can be used as matrix display spare simultaneously.
First organic electroluminescence device 11 and second organic electroluminescence device 21 can all adopt the passive type driving method.Two organic electroluminescence devices also can adopt active formula driving method simultaneously.Perhaps two organic electroluminescence devices adopt active formula and passive type driving method respectively.
The preparation method of double-deck Organnic electroluminescent device of the present invention as shown in Figure 1 is as follows: a transparency carrier 10 is provided, first organic electroluminescence device 11 is prepared on the substrate 10, the encapsulating structure 12 for preparing first organic electroluminescence device then, adopt transparent encapsulating structure, can adopt glass, plastics or thin-film encapsulation layer to encapsulate, to reach the purpose of encapsulation first organic electroluminescence device 11.
Then on the lower surface of transparency carrier 10, prepare second organic electroluminescence device 21, prepare the encapsulating structure 22 of second organic electroluminescence device again.
First organic electroluminescence device is transparent blue-light device, and the organic material of its device architecture and employing is:
ITO/m-MTDATA(100nm)/NPB(20nm)/ADN:TBPe(20nm:3％)/Alq
3(50nm)/Li3N(0.5nm)/Ag(20nm)
With the ITO electro-conductive glass substrate of the good special pattern of etching as substrate, substrate is placed on the deionized water for ultrasonic ripple that contains cleaning fluid to be cleaned, the washing lotion temperature is about 60 ℃, the substrate that will clean with infrared roasting lamp is dried then, put into evaporation chamber evaporation hole injection layer, hole transmission layer, luminescent layer, electron transfer layer and cathode construction successively, evaporate process middle chamber pressure is lower than 5.0 * 10-3Pa.
In the present embodiment, at first the m-MTDATA of evaporation 100nm is as hole injection layer for organic layer, and the thick NPB of 40nm is as hole transmission layer; ADN that the method evaporation 20nm that steams altogether with double source is thick and TBPe are as luminescent layer, and the ratio of through-rate control TBPe in ADN is 3%; The Alq of evaporation 50nm
3As electron transfer layer; The Li3N of evaporation 0.5nm as the Al of electron injecting layer and 20nm as negative electrode.
Second organic electroluminescence device is opaque ruddiness device, and the organic material of its device architecture and employing is:
ITO/m-MTDATA(100nm)/NPB(20nm)/Alq
3:Ir(piq)
2(acac)(10nm:5％)/Alq
3(50nm)/LiF(0.5nm)/Al(150nm)
The second preparation of devices method is identical with first device.
The double-deck Organnic electroluminescent device that last present embodiment is prepared is a white light display unit.
Embodiment 2:
In conjunction with Fig. 2 is the structural representation of present embodiment 2, double-deck Organnic electroluminescent device comprises transparency carrier 10, first organic electroluminescence device 31, the encapsulating structure 32 of first organic electroluminescence device, the encapsulating structure 22 of the driving of first organic electroluminescence device (contact conductor) parts 33, the second organic electroluminescence devices 21, the second organic electroluminescence devices, the driver part of second organic electroluminescence device (contact conductor) 23
It is micromolecule light-emitting diode (OLED) or based on the polymer LED (PLED) of polymer that first organic electroluminescence device 31 and second organic electroluminescence device 21 can independently be selected for use respectively, and the lighting function material in two luminescent devices can independently be selected for use to fluorescent material respectively or be phosphor material.
First organic electroluminescence device 31 is the organic electroluminescence device of PN junction laminated construction, and it comprises three luminescence centers, launches the light of different colours respectively.
The shown graphic color of first organic electroluminescence device 31 can be similar and different in the shown graphic color of second organic electroluminescence device 21.
Two organic electroluminescence devices also can be used as the light source display device simultaneously.Two organic electroluminescence devices also can be used as matrix display spare simultaneously.
First organic electroluminescence device 31 and second organic electroluminescence device 21 can all adopt the passive type driving method.Two organic electroluminescence devices also can adopt active formula driving method simultaneously.Perhaps two organic electroluminescence devices adopt active formula and passive type driving method respectively.
Embodiment 3:
In conjunction with Fig. 3 is the structural representation of present embodiment 3, the multilayer Organnic electroluminescent device comprises transparency carrier 10, first organic electroluminescence device 41, the encapsulating structure 42 of first organic electroluminescence device, the driving of first organic electroluminescence device (contact conductor) parts 43, second organic electroluminescence device 51, the encapsulating structure 52 of second organic electroluminescence device, the driving of second organic electroluminescence device (contact conductor) parts 53, the 3rd organic electroluminescence device 61, the encapsulating structure 62 of the 3rd organic electroluminescence device, the driver part of the 3rd organic electroluminescence device (contact conductor) 63, wherein the second and the 3rd organic electroluminescence device is transparent devices.
The shown graphic color of above-mentioned three organic electroluminescence devices can be similar and different.
Three organic electroluminescence devices can be used as the light source display device simultaneously, also can be used as matrix display spare simultaneously.
Three organic electroluminescence devices can all adopt the passive type driving method, also can adopt active formula driving method simultaneously.
In sum; though the present invention discloses preferred embodiment as above; but can not be in order to as limitation of the invention; those skilled in the art without departing from the spirit and scope of the present invention; any change and the modification made all should be considered as not exceeding the scope that claims of the present invention are protected.
Claims (13)
1. unidirection luminous double-deck OLED device comprises:
A transparency carrier, two surfaces of this substrate all prepare the transparent conductive film layer;
First organic electroluminescence device is arranged at the upper surface of this substrate;
Second organic electroluminescence device is arranged at the lower surface of this substrate;
The first above-mentioned organic electroluminescence device is a transparent devices.
2. a kind of double-deck OLED device according to claim 1 is characterized in that the material of described transparency carrier is glass or plastics.
3. a kind of double-deck OLED device according to claim 1 is characterized in that, described two organic electroluminescence devices are respectively by two driving device controls.
4. a kind of double-deck OLED device according to claim 1 is characterized in that described two organic electroluminescence devices encapsulate respectively.
5. a kind of double-deck OLED device according to claim 1, it is characterized in that, described two organic electroluminescence devices are all luminous to the upper surface direction of substrate, and corresponding second electrode of first electrode with being positioned at upper surface of base plate that first organic electroluminescence device is adopted is a transparency electrode;
Corresponding second electrode of first electrode with being positioned at base lower surface that second organic electroluminescence device is adopted is a reflective electrode.
6. a kind of double-deck OLED device according to claim 5, it is characterized in that, second electrode material that described first organic electroluminescence device is adopted is Ag or indium tin oxide, and second electrode material that second organic electroluminescence device is adopted is that opaque electric conducting material is AL, Mg, Ag.
7. a kind of double-deck OLED device according to claim 5 is characterized in that, first organic electroluminescence device adopts the transparent encapsulating structure encapsulation.
8. a kind of double-deck OLED device according to claim 1 is characterized in that the glow color of described two organic electroluminescence devices is identical.
9. a kind of double-deck OLED device according to claim 1 is characterized in that, the glow color difference of described two organic electroluminescence devices, and the light of these two kinds of colors can form the light that is different from these two colors that organic electroluminescence device is sent out after mixing.
10. a kind of double-deck OLED device according to claim 1 is characterized in that, has one in described first organic electroluminescence device or second organic electroluminescence device at least for piling up the device of junction type, includes a plurality of luminescent layers in this stacked structure.
11. a unidirection luminous multilayer OLED device comprises:
A transparency carrier, two surfaces of this substrate all prepare the transparent conductive film layer;
First organic electroluminescence device is arranged at the lower surface of this substrate;
Second organic electroluminescence device is arranged at the upper surface of this substrate;
The 3rd organic electroluminescence device is on the stack setting and second organic electroluminescence device;
Above-mentioned second organic electroluminescence device and the 3rd organic electroluminescence device are transparent devices.
12. a kind of multilayer OLED device according to claim 11 is characterized in that, described three organic electroluminescence devices are respectively by three driving device controls.
13. a kind of multilayer OLED device according to claim 11, it is characterized in that described three organic electroluminescence devices are all luminous to the upper surface direction of substrate, corresponding second electrode of first electrode with being positioned at upper surface of base plate that second organic electroluminescence device is adopted is a transparency electrode; Two electrodes that the 3rd organic electroluminescence device is adopted are transparency electrode; Corresponding second electrode of first electrode with being positioned at base lower surface that first organic electroluminescence device is adopted is a reflective electrode.
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| CN2009100849807A CN101908531A (en) | 2009-06-05 | 2009-06-05 | Multilayer electroluminescent device |
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| CN2009100849807A CN101908531A (en) | 2009-06-05 | 2009-06-05 | Multilayer electroluminescent device |
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| CN105140410A (en) * | 2015-06-26 | 2015-12-09 | 京东方科技集团股份有限公司 | Electroluminescent device, manufacture and drive methods thereof, and display device |
| CN106549034A (en) * | 2015-09-18 | 2017-03-29 | 环球展览公司 | Mixing escope |
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Application publication date: 20101208 |