CN101908532B - Thin double-faced display OLED (Organic Light Emitting Diode) device and manufacturing method thereof - Google Patents
Thin double-faced display OLED (Organic Light Emitting Diode) device and manufacturing method thereof Download PDFInfo
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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
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/128—Active-matrix OLED [AMOLED] displays comprising two independent displays, e.g. for emitting information from two major sides of the display
-
- 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
- H10K59/87—Passivation; Containers; Encapsulations
- H10K59/873—Encapsulations
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/50—Forming devices by joining two substrates together, e.g. lamination techniques
Abstract
The invention relates to a double-faced display OLED (Organic Light Emitting Diode) device and a manufacturing method thereof. The double-faced display OLED device comprises a first base board and a second base board, wherein a first OLED device is arranged on the first base board, and a first thin film packaging layer is arranged on the first OLED device; the second base board is opposite to the first base board, a second OLED device is arranged on the second base board, and a second thin film packaging layer is arranged on the second OLED device; and the first base board and the second base board are bonded with each other through packaging glue. The double-faced display device has the characteristic that two light-emitting faces can completely and independently emit light for display without influencing each other.
Description
Technical field
The present invention relates to field of optoelectronic devices, relate in particular to OLED device of a kind of double-sided display and preparation method thereof.
Technical background
Organic electroluminescence device (OLED) is as a kind of New Type Display Devices, and existing main flat-panel monitor liquid crystalline phase ratio, has lot of advantages and possesses extremely strong competitiveness.The general structure of organic electroluminescence device comprises successively: matrix, anode, organic layer, negative electrode, organic function layer comprises again emission layer (EML), can also comprise hole injection layer (HIL) and/or hole transmission layer (HTL) between anode and emission layer, and the 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.
Current OLED product is substantially all for common light emitting display, if OLED can meet two sides simultaneously, realizes independent luminously by drive, can greatly improve the practical value of OLED display products.
In prior art, as CN200610004422.1, CN200610036679.5 prepare two luminous components on same device substrate, luminous to different directions respectively; As CN200510022930.8, CN200510052900.1 prepare respectively two OLED devices in the both sides of same device substrate, the direction outside substrate is luminous separately; Just like CN1589075, CN1575073, be also all to adopt polarized material to realize luminous.
These patents have substantially all realized to a certain extent and have prepared the OLED with double-side function above, but these products or structure are too thick and heavy, or preparation technology is quite complicated, thereby cost is higher.
Therefore, research and develop and a kind ofly can realize double-side function, the New O LED device that does not increase again preparation cost has a very big significance.
Technology contents
The object of the invention is to overcome the defect of above-mentioned prior art, a kind of can realize double-sided display and frivolous OLED device of volume is provided, provide that a kind of cost is low, the simple preparation method of technique simultaneously.
For achieving the above object, technical scheme of the present invention is:
A double side display organic electroluminescence light emitting device, comprising: a first substrate, and the first organic electroluminescence device, is arranged on this first substrate, and the first film encapsulated layer is prepared on the first organic electroluminescence device; A second substrate, is oppositely arranged with first substrate, and the second organic electroluminescence device is arranged on this second substrate, and the second thin-film encapsulation layer is prepared on the second organic electroluminescence device; Above-mentioned first substrate and second substrate are bonding by packaging plastic.
Above-mentioned the first organic electroluminescence device and the second organic electroluminescence device are controlled by two drive units respectively.
Above-mentioned first substrate of the present invention and second substrate are transparent, and thin-film encapsulation layer is transparent or opaque.
The first organic electroluminescence device of the present invention is as light source display device, and the second organic electroluminescence device is as matrix display part.
Or two organic electroluminescence devices of the present invention are all as light source display device.Or two organic electroluminescence devices of the present invention are all as matrix display part.
The present invention also proposes a kind of preparation method of double side display organic electroluminescence light emitting device, comprise that step is as follows: provide a first substrate, the first organic electroluminescence device is prepared on first substrate, on the first organic electroluminescence device, prepares the first film encapsulated layer; A second substrate is provided, the second organic electroluminescence device is prepared on second substrate, on the second organic electroluminescence device, prepare the second thin-film encapsulation layer; Assemble this first substrate and second substrate, adopt packaging plastic that first substrate and second substrate is bonding to encapsulate the first organic electroluminescence device and the second organic electroluminescence device.
The beneficial effect of double-side display device of the present invention is:
(1) two light-emitting area can complete independent luminescence display, mutually not impact.
The performance index of (2) two light-emitting area devices (brightness, efficiency, life-span etc.) are in full accord with one side individual devices.
Accompanying drawing explanation
Fig. 1 is the device architecture schematic diagram of embodiment 1;
Detailed description of main elements:
11 is that first substrate, 12 is that the first organic electroluminescence device, 13 is that the first film encapsulated layer, 14 is the first contact conductor district; 21 is that second substrate, 22 is that the second organic electroluminescence device, 23 is that the second thin-film encapsulation layer, 24 is the second contact conductor district; 30 is packaging plastic.
Embodiment
OLED device with double-sided display function of the present invention, adopts two organic electroluminescence devices to be prepared from.
Substrate can be glass or flexible substrate, and flexible substrate adopts a kind of material in polyesters, 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 the metal oxides such as ITO, zinc oxide, zinc tin oxide or gold, copper, silver, the optimized ITO that is chosen as, organic conductive polymer is preferably a kind of material in polythiophene/polyvinylbenzenesulfonic acid sodium (hereinafter to be referred as PEDOT:PSS), polyaniline (hereinafter to be referred as PANI); The second electrode lay (cathode layer, metal level), the general alloy that adopts metal that the work functions such as lithium, magnesium, calcium, strontium, aluminium, indium are lower 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, it can be fluorescent material, if metal organic complex is (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 compound, or be anthracene derivative (as ADN), perylene analog derivative is (as 2, 5, 8, the tertiary Ding Ji perylene of 11-4-(TBPe)) luminescent layer material also can adopt carbazole derivates as 4, 4 '-N, N '-bis-carbazole-biphenyl (CBP), polyvinylcarbazole (PVK), can Doping Phosphorus photoinitiator dye in this material, as three (2-phenylpyridine) iridium (Ir (ppy) 3), two (2-phenylpyridine) (acetylacetone,2,4-pentanedione) iridium (Ir (ppy) 2 (acac)), octaethylporphyrin platinum (PtOEP) etc.,
In above-mentioned device architecture, can also comprise electron transfer layer, hole injection layer and hole transmission layer, electron transfer layer (ETL) adopts oxine aluminium (Alq3) conventionally; The host material of hole injection layer (HIL) can adopt copper phthalocyanine (CuPc), 4,4 ' 4 "-tri-(N-3-aminomethyl phenyl-N-phenyl-amino)-triphenylamine (m-MTDATA), 4,4 ' 4 "-tri-(N-2-naphthyl-N-phenyl-amino)-triphenylamine (2-TNATA); The host material of hole transmission layer (HTL) can adopt the low molecular material of the arylamine Lei He branch polymer same clan, is preferably N, N '-bis--(1-naphthyl)-N, N '-diphenyl-1,1 '-xenyl-4,4 '-diamines (NPB); Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Embodiment 1:
It in conjunction with Fig. 1, is the structural representation of the present embodiment, double side display organic electroluminescence light emitting device comprises that first substrate 11, the first organic electroluminescence device 12 are arranged on this first substrate, and the first film encapsulated layer 13 is prepared on the first organic electroluminescence device 12; Second substrate 21, the second organic electroluminescence device 22 are arranged on this first substrate, and the second thin-film encapsulation layer 23 is prepared on the second organic electroluminescence device 22; Packaging plastic 30 is for being bonded together first substrate and second substrate to encapsulate two devices.
The material of first substrate 11 and second substrate 21 can be the good glass of light transmission or plastic material.
It is the polymer LED (PLED) that little mulecular luminescence diode (OLED) or the polymer of take are master that the first organic electroluminescence device 12 and the second organic electroluminescence device 22 can independently be selected respectively, and the lighting function material in two luminescent devices can independently be selected respectively as fluorescent material or be phosphor material.
The picture that the first organic electroluminescence device 12 is shown and information can be similar and different in the second organic electroluminescence device 22 shown picture or information.
The first organic electroluminescence device 12 can be used as light source display device, and the second organic electroluminescence device 22 is as matrix display part simultaneously.Two organic electroluminescence devices also can be used as light source display device simultaneously.Two organic electroluminescence devices also can be used as matrix display part simultaneously.
The first organic electroluminescence device 12 and the second organic electroluminescence device 22 can all adopt passive type driving method.Two organic electroluminescence devices also can adopt active formula driving method simultaneously.Or two organic electroluminescence devices adopt respectively active formula and passive type driving method.
The preparation method of double side display organic electroluminescence light emitting device of the present invention is as shown in Figure 1 as follows: a first substrate 11 is provided, the first organic electroluminescence device 12 is prepared on first substrate 11, then the first film encapsulated layer 13 is prepared on the first organic electroluminescence device 12;
A second substrate 21 is then provided, the second organic electroluminescence device 22 is prepared on second substrate 21, then the second thin-film encapsulation layer 23 is prepared on the second organic electroluminescence device 22;
Finally assemble this first substrate 11 and second substrate 21: adopt packaging plastic 30 that first substrate 11 and second substrate 21 is bonding to encapsulate the first organic electroluminescence device 12 and the second organic electroluminescence device 22.
The first organic electroluminescence device is 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)/LiF (0.5nm)/Al (150nm)
Using the ITO electro-conductive glass substrate of the good special pattern of etching as substrate, the deionized water for ultrasonic ripple that substrate is placed on containing cleaning fluid cleans, washing lotion temperature is about 60 ℃, then with infrared baking lamp, the substrate having cleaned is dried, 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, 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; The ADN that method evaporation 20nm that the double source of usining steams is altogether thick and TBPe are as luminescent layer, and it is 3% that through-rate is controlled the ratio of TBPe in ADN; The Alq of evaporation 50nm
3as electron transfer layer; The LiF of evaporation 0.5nm as the Al of electron injecting layer and 150nm as negative electrode.
The second organic electroluminescence device is 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 preparation method of the second device is identical with the first device.
The Organnic electroluminescent device of the double-sided display that last the present embodiment is prepared, one of them light-emitting area is shown as blueness, and another light-emitting area is shown in red.
In sum; although 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 the claims in the present invention book is protected.
Claims (7)
1. a double side display organic electroluminescence light emitting device, comprising:
A first substrate, the first organic electroluminescence device, is arranged on this first substrate, and the first film encapsulated layer is prepared on the first organic electroluminescence device;
A second substrate, is oppositely arranged with first substrate, and the second organic electroluminescence device is arranged on this second substrate, and the second thin-film encapsulation layer is prepared on the second organic electroluminescence device;
Above-mentioned first substrate and second substrate are bonding by packaging plastic;
Wherein, the first organic electroluminescence device and the second organic electroluminescence device are independently selected respectively little mulecular luminescence diode or be take polymer as main polymer LED, and the lighting function material in two luminescent devices is independently selected respectively as fluorescent material or is phosphor material.
2. device according to claim 1, is characterized in that, described the first organic electroluminescence device and the second organic electroluminescence device are controlled by two drive units respectively.
3. device according to claim 1 and 2, is characterized in that, described first substrate and second substrate all adopt transparent material, and thin-film encapsulation layer adopts transparent or opaque material.
4. device according to claim 1 and 2, is characterized in that, described the first organic electroluminescence device is as light source display device, and the second organic electroluminescence device is as matrix display part.
5. device according to claim 1 and 2, is characterized in that, described two organic electroluminescence devices are all as light source display device.
6. device according to claim 1 and 2, is characterized in that, described two organic electroluminescence devices are all as matrix display part.
7. a preparation method for double side display organic electroluminescence light emitting device, comprises that step is as follows:
A first substrate is provided, the first organic electroluminescence device is prepared on first substrate, on the first organic electroluminescence device, prepare the first film encapsulated layer;
A second substrate is provided, the second organic electroluminescence device is prepared on second substrate, on the second organic electroluminescence device, prepare the second thin-film encapsulation layer;
Assemble this first substrate and second substrate, adopt packaging plastic that first substrate and second substrate is bonding to encapsulate the first organic electroluminescence device and the second organic electroluminescence device;
Wherein, the first organic electroluminescence device and the second organic electroluminescence device are independently selected respectively little mulecular luminescence diode or be take polymer as main polymer LED, and the lighting function material in two luminescent devices is independently selected respectively as fluorescent material or is phosphor material.
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| CN102593149A (en) * | 2012-02-29 | 2012-07-18 | 南京中电熊猫液晶显示科技有限公司 | Double-sided OLED (Organic Light Emitting Diode) display and manufacturing method thereof |
| CN102646697B (en) * | 2012-05-08 | 2015-02-04 | 南京中电熊猫液晶显示科技有限公司 | OLED (Organic Light Emitting Diode) double-mirror-surface display |
| CN104576697A (en) * | 2014-12-24 | 2015-04-29 | 深圳市华星光电技术有限公司 | Double-sided OLED (organic light emitting diode) display device and manufacture method thereof |
| CN104659074B (en) * | 2015-03-17 | 2019-04-09 | 京东方科技集团股份有限公司 | A kind of oled substrate, its manufacturing method, panel and display device |
| CN105932036A (en) * | 2016-05-10 | 2016-09-07 | 武汉华星光电技术有限公司 | Double-surface OLED display and manufacturing method thereof |
| US20200258478A1 (en) * | 2019-02-11 | 2020-08-13 | GM Global Technology Operations LLC | Programmable glass display |
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