CN1979915A - Organic electric luminous element - Google Patents
Organic electric luminous element Download PDFInfo
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- CN1979915A CN1979915A CN 200510124258 CN200510124258A CN1979915A CN 1979915 A CN1979915 A CN 1979915A CN 200510124258 CN200510124258 CN 200510124258 CN 200510124258 A CN200510124258 A CN 200510124258A CN 1979915 A CN1979915 A CN 1979915A
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Abstract
The organic electroluminescent cell includes transparent base plate, organic electroluminescent cells, and reflecting electrode layers. These organic electroluminescent cells are piled on the base plate. The reflecting electrode layer is setup between adjacent two organic electroluminescent cells. Thus, the invention provides function of display on two sides.
Description
Technical field
The present invention relates to a kind of light-emitting component, and be particularly related to a kind of organic electroluminescent device.
Background technology
Organic electroluminescent device (organic electro-luminescent device, OELD) be the element that a kind of self-luminous characteristic of utilizing organic functional material (organic functional material) reaches display effect, wherein the molecular weight according to organic functional material is divided into micromolecule organic electroluminescent device (Small Molecule OELD, SM-OELD) with high molecule electroluminescent element (PolymerElectro-Luminescent Device, PELD) two big classes.Both ray structures are made of pair of electrodes and organic function layer, and relevant for the structure of known organic electroluminescent device will describe in detail as after.
Fig. 1 is the structural representation of known organic electroluminescent device.Please refer to Fig. 1, known organic electroluminescent device 100 comprises substrate 110, anode layer 120, organic function layer 130 and cathode layer 140, wherein anode layer 120 is arranged on the substrate 110, and the material of this anode layer 120 be indium tin oxide (indium tin oxide, ITO).Organic function layer 130 is arranged on the anode layer 120, and this organic function layer 130 is generally the multilayer organic film and constitutes.In addition, cathode layer 140 is arranged on the organic function layer 130, and the material of cathode layer 140 metal normally.
When applying direct voltage, organic function layer 130 is injected from anode layer 120 in the hole, and electronics injects organic function layer 130 from cathode layer 140, because the potential difference that extra electric field caused makes two kinds of charge carriers of hole and electronics (carrier) move and produce radiation recombination (radiative recombination) in organic function layer 130.Part can form the luminous organic material molecular excitation single excite state molecule in conjunction with the energy of being emitted again by the electron hole.When single excite state molecule releases energy when getting back to ground state, wherein a certain proportion of energy can be emitted and luminous in the mode of photon, and this is the principle of luminosity of known organic electroluminescent device 100.
Yet known organic electroluminescent device 100 existing problems are that the light that organic function layer 130 sent produces reflection or refraction easily because of the difference of the refractive index of each layer in the element.Therefore, the wide part that organic function layer 130 is sent all is restricted to element internal and can't penetrates out substrate 110, thereby makes that the luminous efficiency of organic electroluminescent device 100 is on the low side.In addition, known organic electroluminescent device 100 is usually can only single face luminous and the function of double-side can't be provided.
Summary of the invention
In view of the foregoing, purpose of the present invention just provides a kind of organic electroluminescent device, so that the function of double-side to be provided.
Based on above-mentioned purpose or other purpose, the present invention proposes a kind of organic electroluminescent device, it comprises transparency carrier, a plurality of organic electroluminescence cell and reflection electrode layer, wherein these organic electroluminescence cells are stacked on the transparency carrier, and reflection electrode layer is arranged between the two adjacent organic electroluminescence cells.
According to the embodiment of the invention, the material of reflection electrode layer can be aluminium, calcium, magnesium, indium, tin, manganese, silver, gold and alloy thereof.
According to the embodiment of the invention, organic electroluminescent device also comprises the first type doped layer and the second type doped layer, and reflection electrode layer is arranged between the first type doped layer and the second type doped layer.
According to the embodiment of the invention, each organic electroluminescence cell comprise anode layer, cathode layer and be arranged at anode layer and cathode layer between organic function layer.
According to the embodiment of the invention, the organic electroluminescence cell of close substrate surface comprises anode layer and organic function layer, and wherein anode layer is arranged on the substrate.Organic function layer is arranged on the anode layer, and is positioned at reflection electrode layer on the organic function layer of this organic electroluminescence cell as cathode layer.In addition, anode layer is a transparent conductor layer, and the material of this transparent conductor layer can be indium tin oxide (indium tin oxide, ITO), indium-zinc oxide (indium zinc oxide, IZO) or the aluminium zinc oxide (aluminum zinc oxide, AZO).
According to the embodiment of the invention, the organic electroluminescence cell away from the transparency carrier surface comprises cathode layer and organic function layer.Organic function layer be arranged at cathode layer under, and be positioned at reflection electrode layer under the organic function layer of this organic electroluminescence cell as anode layer.In addition, the material of cathode layer can be aluminium, calcium, magnesium, indium, tin, manganese, silver, gold or its alloy.In addition, cathode layer also can be a transparent conductor layer, and wherein the material of transparent conductor layer can be indium tin oxide, indium-zinc oxide or aluminium zinc oxide.
According to the embodiment of the invention, the organic electroluminescence cell on the most close transparency carrier surface comprises anode layer and organic function layer, and wherein anode layer is arranged on the substrate.Organic function layer is arranged on the anode layer, and is positioned at reflection electrode layer on the organic function layer of this organic electroluminescence cell as cathode layer.In addition, organic electroluminescence cell away from the transparency carrier surface comprises cathode layer and organic function layer, wherein organic function layer be arranged at cathode layer under, and be positioned at reflection electrode layer under the organic function layer of this organic electroluminescence cell as anode layer.
According to the embodiment of the invention, transparency carrier can be glass substrate, plastic base or deflection substrate (flexible substrate).
Based on above-mentioned, the present invention adopts reflection electrode layer to connect two adjacent organic electroluminescence cells or two adjacent organic function layers, so that from the two-sided light that sends different colours, therefore organic electroluminescent device of the present invention can provide the function of double-sided display.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1 is the structural representation of known organic electroluminescent device.
Fig. 2 is the generalized section according to the organic electroluminescent device of first embodiment of the invention.
Fig. 3 is the generalized section according to the organic electroluminescent device of second embodiment of the invention.
Fig. 4 is the spectrogram according to the organic electroluminescent device of second embodiment of the invention.
The main element description of symbols
100: known organic electroluminescent device
110: substrate
120: anode layer
130: organic function layer
140: cathode layer
200,300: organic electroluminescent device
210: transparency carrier
220a, 220b, 310a, 310b: organic electroluminescence cell
222a, 222b: anode layer
224a, 224b: organic function layer
226a, 226b: cathode layer
230: reflection electrode layer
232: the first type doped layers
234: the second type doped layers
2422a: hole injection layer
2422b, 2424b: hole transmission layer
2422c, 2424c: organic luminous layer
2422d, 2424d: electron transfer layer
2422e, 2424e: electron injecting layer
Embodiment
First embodiment
Fig. 2 is the generalized section according to the organic electroluminescent device of first embodiment of the invention.Please refer to Fig. 2, the organic electroluminescent device 200 of present embodiment comprises transparency carrier 210, a plurality of organic electroluminescence cell 220a, 220b and reflection electrode layer 230, wherein these organic electroluminescence cells 220a and 220b are stacked on the transparency carrier 210, and reflection electrode layer 230 is arranged between these organic electroluminescence cells 220a and the 220b.In addition, transparency carrier 210 for example is glass substrate, quartz base plate, plastic base or deflection substrate.In the present embodiment, organic electroluminescent device 200 also comprises the first type doped layer 232 and the second type doped layer 234, and reflection electrode layer 230 is arranged between the first type doped layer 232 and the second type doped layer 234.For example, the first type doped layer 232 can be a n type doped layer, and the second type doped layer 234 can be a p type doped layer.
More specifically, organic electroluminescence cell 220a comprise anode layer 222a, cathode layer 226a and be arranged at anode layer 222a and cathode layer 226a between organic function layer 224a.In addition, organic function layer 224a also can be actual required and comprise hole injection layer, hole transmission layer, electron transfer layer and electron injecting layer or its combination layer in addition according to each element except having comprised main organic luminous layer.
Similarly, organic electroluminescence cell 220b comprise anode layer 222b, cathode layer 226b and be arranged at anode layer 222b and cathode layer 226b between organic function layer 224b.In addition, the structural similarity of organic function layer 224b and organic function layer 224a, same organic function layer 224b also can be actual required and comprise hole injection layer, hole transmission layer, electron transfer layer and electron injecting layer or its combination layer in addition according to each element except having comprised main organic luminous layer.
Anode layer 222a and 222b can be transparent or semitransparent.In addition, anode layer 222a and 222b can be transparent conductor layers, and the material of this transparent conductor layer for example is indium tin oxide, indium-zinc oxide, aluminium zinc oxide or other transparent metal oxide.When the material of anode layer 222a was indium tin oxide, indium-zinc oxide, aluminium zinc oxide or other transparent metal oxide, the method that forms anode layer 222a can be sputtering process or evaporation process.In addition, cathode layer 226a and 226b also can be transparent or semitransparent, and the material of cathode layer 226a and 226b can be aluminium, calcium, magnesium, indium, tin, manganese, silver, gold or its alloy, and the alloy that wherein contains magnesium for example is magnesium silver (Mg:Ag) alloy, magnesium indium (Mg:In) alloy, magnesium tin (Mg:Sn) alloy, magnesium antimony (Mg:Sb) alloy or magnesium tellurium (Mg:Te) alloy.
Please continue with reference to Fig. 2, reflection electrode layer 230 can adopt the mode of evaporation to form, and wherein reflection electrode layer 230 can be aluminium or other metal material, and reflection electrode layer 230 thickness can be 1000 dusts or other thickness and can shading.Since reflection electrode layer 230 not only as the articulamentum (interconnecting layer) that connects two organic electroluminescence cell 220a and 220b, also make light that two organic electroluminescence cell 220a and 220b sent can be respectively by two relative surperficial outgoing of organic electroluminescent device 200.In other words, the organic electroluminescent device 200 of present embodiment can send the light of two kinds of different colours, so that reach the function of double-sided display.
Organic electroluminescent device 200 that it should be noted that present embodiment does not limit has only two organic electroluminescence cell 220a and 220b, also can have plural organic electroluminescence cell.In addition, the material at the organic function layer of these organic electroluminescence cells also can be identical or inequality.In other words, the light that these organic electroluminescence cells sent can be with a kind of color or different colours.
Second embodiment
Fig. 3 is the generalized section according to the organic electroluminescent device of second embodiment of the invention.Please refer to Fig. 3, second embodiment is similar to first embodiment, and its difference is: in the organic electroluminescent device 300 of present embodiment, reflection electrode layer 230 is as the common electrode layer.In other words, reflection electrode layer 230 is arranged between the adjacent two organic function layer 224a and 224b.What deserves to be mentioned is,, therefore in the process that forms reflection electrode layer 230, can not cause damage organic function layer 224a because reflection electrode layer 230 can adopt the mode of evaporation to form.
More specifically, reflection electrode layer 230, organic function layer 224a and transparent anode layer 222a constitute organic electroluminescence cell 310a, so reflection electrode layer 230 is the cathode layers as organic electroluminescence cell 310a.Similarly, reflection electrode layer 230, organic function layer 224b and cathode layer 226b constitute another organic electroluminescence cell 310b, so reflection electrode layer 230 is again simultaneously as the anode layer of organic electroluminescence cell 310b.
Organic function layer 224a comprises hole injection layer 2422a, hole transmission layer 2422b, organic luminous layer 2422c, electron transfer layer 2422d and electron injecting layer 2422e, and organic function layer 224b comprises hole injection layer 2424a, hole transmission layer 2424b, organic luminous layer 2424c, electron transfer layer 2424d and electron injecting layer 2424e.In addition, the material of hole injection layer 2422a can be that (copper phthalocyanine, CuPc), and the thickness of hole injection layer 2422a is about 150 dusts to copper phthalocyanine.The material of hole transmission layer 2422b and 2424b can be NPB (α-naphylhenyldiamine), and the thickness of hole transmission layer 2422b and 2424b is about 700 dusts and 600 dusts respectively.
The material of organic luminous layer 2422c can be MADN and alloy DSA-Ph, and DSA-Ph is about 3% to the volume ratio of MADN, and the thickness of organic luminous layer 2422c is about 400 dusts.In addition, the material of organic luminous layer 2424c can be Alq3 and alloy Ru, and Ru is about 4% to the volume ratio of Alq3, and the thickness of organic luminous layer 2424c is about 375 dusts.
The material of electron transfer layer 2422d and 2424d can be Alq3, and the thickness of electron transfer layer 2422d and 2424d is about 100 dusts and 375 dusts respectively.In addition, the material of electron injecting layer 2422e can be Mg and Alq3, and Mg is about 1: 1 to the volume ratio of Alq3, and the thickness of electron injecting layer 2422e is about 100 dusts.In addition, the material of electron injecting layer 2424e can be WO
3With NPB, and WO
3Volume ratio to NPB is about 3: 1, and the thickness of electron injecting layer 2424e is about 200 dusts.Moreover the thickness of cathode layer 226b is about 400 dusts.In the present embodiment, the first type doped layer 232 can be a n type doped layer, and the second type doped layer 234 can be a p type doped layer.
In above-mentioned first embodiment and second embodiment, formed each rete all forms with identical (for example evaporation) technology after anode layer 222a, therefore the present invention not only can shorten outside the process time, also can form anode layer 222a each rete afterwards continuously.
Fig. 4 is the optical characteristics figure according to the organic electroluminescent device of second embodiment of the invention.Please refer to Fig. 4, abscissa is a wavelength, and the ordinate luminous intensity.As shown in Figure 4, the peak-peak of the organic electroluminescent device 300 of present embodiment is respectively 486 nanometers and 628 nanometers, so the present invention can the different information of double-sided display.
In sum, organic electroluminescent device of the present invention adopts reflection electrode layer as articulamentum, to connect two adjacent organic electroluminescence cells, two adjacent organic function layers or two adjacent organic electroluminescence cell and organic function layers.Compare with known technology, organic electroluminescent device of the present invention has the function of double-sided display, and that is to say can the different color of double-sided display.Because organic electroluminescent device of the present invention has the function of double-sided display, therefore organic electroluminescent device of the present invention also can be used for the mobile phone of double-sided display, two-sided TV or double-sided screen.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; any person of ordinary skill in the field; without departing from the spirit and scope of the present invention; when can doing a little change and improvement, so protection scope of the present invention is as the criterion when looking the claim person of defining.
Claims (13)
1. an organic electroluminescent device is suitable for double-side, it is characterized in that this organic electroluminescent device comprises:
Transparency carrier;
A plurality of organic electroluminescence cells are stacked on this substrate; And
Reflection electrode layer, this reflection electrode layer are arranged between adjacent above-mentioned these organic electroluminescence cells.
2. organic electroluminescent device according to claim 1, the material that it is characterized in that this reflection electrode layer are selected from a kind of in the group that aluminium, calcium, magnesium, indium, tin, manganese, silver, gold and alloy thereof form.
3. organic electroluminescent device according to claim 1 it is characterized in that also comprising the first type doped layer and the second type doped layer, and this reflection electrode layer is arranged between this first type doped layer and this second type doped layer.
4. organic electroluminescent device according to claim 1 is characterized in that each above-mentioned these organic electroluminescence cell comprises:
Anode layer;
Cathode layer; And
Organic function layer is arranged between this anode layer and this cathode layer.
5. organic electroluminescent device according to claim 1 is characterized in that this organic electroluminescence cell of the most close this substrate surface comprises:
Anode layer is arranged on this transparency carrier; And
Organic function layer is arranged on this anode layer, wherein is positioned at this reflection electrode layer on this organic function layer of this organic electroluminescence cell as cathode layer.
6. organic electroluminescent device according to claim 5 is characterized in that this anode layer is a transparent conductor layer.
7. organic electroluminescent device according to claim 6 is characterized in that the material of this transparent conductor layer comprises indium tin oxide, indium-zinc oxide or aluminium zinc oxide.
8. organic electroluminescent device according to claim 1 is characterized in that comprising away from this organic electroluminescence cell on this transparency carrier surface:
Cathode layer; And
Organic function layer, be arranged at this cathode layer under, wherein be positioned at this reflection electrode layer under this organic function layer of this organic electroluminescence cell as anode layer.
9. organic electroluminescent device according to claim 8, the material that it is characterized in that this cathode layer are selected from a kind of in the group that aluminium, calcium, magnesium, indium, tin, manganese, silver, gold and alloy thereof form.
10. organic electroluminescent device according to claim 8 is characterized in that this cathode layer is a transparent conductor layer.
11. organic electroluminescent device according to claim 10 is characterized in that the material of this transparent conductor layer comprises indium tin oxide, indium-zinc oxide or aluminium zinc oxide.
12. organic electroluminescent device according to claim 1, this organic electroluminescence cell that it is characterized in that the most close this transparency carrier surface comprises anode layer that is arranged on this transparency carrier and the organic function layer that is arranged on this anode layer, and be positioned at this reflection electrode layer on this organic function layer of this organic electroluminescence cell as cathode layer, this organic electroluminescence cell away from this transparency carrier surface comprises cathode layer and is arranged at the beneath organic function layer of this cathode layer, and is positioned at this reflection electrode layer under this organic function layer of this organic electroluminescence cell as anode layer.
13. organic electroluminescent device according to claim 1 is characterized in that this transparency carrier comprises glass substrate, plastic base or deflection substrate.
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| CNB2005101242583A CN100514703C (en) | 2005-11-29 | 2005-11-29 | Organic electric luminous element |
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| CNB2005101242583A CN100514703C (en) | 2005-11-29 | 2005-11-29 | Organic electric luminous element |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101729488B (en) * | 2009-11-13 | 2012-02-01 | 四川虹视显示技术有限公司 | Double-sided OLED display |
| WO2012075639A1 (en) * | 2010-12-09 | 2012-06-14 | 海洋王照明科技股份有限公司 | Double-sided luminescent organic light emitting device and manufacturing method thereof |
| CN102769104A (en) * | 2011-05-06 | 2012-11-07 | 海洋王照明科技股份有限公司 | Flexible two-sided light-emitting organic electroluminescence device and preparation method thereof |
| WO2013091520A1 (en) * | 2011-12-19 | 2013-06-27 | 北京联想软件有限公司 | Double-sided organic light-emitting diode, and manufacturing method and display device thereof |
| CN106324877A (en) * | 2016-10-20 | 2017-01-11 | 京东方科技集团股份有限公司 | Display panel, production method and driving method thereof as well as display device |
| CN107331687A (en) * | 2017-07-11 | 2017-11-07 | 武汉华星光电半导体显示技术有限公司 | OLED display with double faces and preparation method thereof |
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| DE102014006571B3 (en) * | 2014-05-07 | 2015-08-06 | Otto Bock Healthcare Gmbh | prosthetic |
| CN106684072A (en) * | 2017-03-02 | 2017-05-17 | 江苏集萃有机光电技术研究所有限公司 | Organic light emitting diode (OLED) device |
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- 2005-11-29 CN CNB2005101242583A patent/CN100514703C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101729488B (en) * | 2009-11-13 | 2012-02-01 | 四川虹视显示技术有限公司 | Double-sided OLED display |
| WO2012075639A1 (en) * | 2010-12-09 | 2012-06-14 | 海洋王照明科技股份有限公司 | Double-sided luminescent organic light emitting device and manufacturing method thereof |
| US8957409B2 (en) | 2010-12-09 | 2015-02-17 | Ocean's King Lighting Science & Technology Co., Ltd. | Double-sided luminescent organic light emitting device and manufacturing method thereof |
| CN102769104A (en) * | 2011-05-06 | 2012-11-07 | 海洋王照明科技股份有限公司 | Flexible two-sided light-emitting organic electroluminescence device and preparation method thereof |
| CN102769104B (en) * | 2011-05-06 | 2015-12-16 | 海洋王照明科技股份有限公司 | A kind of flexible double-sided light-emitting organic electroluminescent device and preparation method thereof |
| WO2013091520A1 (en) * | 2011-12-19 | 2013-06-27 | 北京联想软件有限公司 | Double-sided organic light-emitting diode, and manufacturing method and display device thereof |
| US9312321B2 (en) | 2011-12-19 | 2016-04-12 | Beijing Lenovo Software Ltd. | Double-sided organic light-emitting diode, and manufacturing method and display device thereof |
| CN106324877A (en) * | 2016-10-20 | 2017-01-11 | 京东方科技集团股份有限公司 | Display panel, production method and driving method thereof as well as display device |
| CN106324877B (en) * | 2016-10-20 | 2019-09-20 | 京东方科技集团股份有限公司 | Display panel, display panel production method and driving method, display device |
| US10431158B2 (en) | 2016-10-20 | 2019-10-01 | Boe Technology Group Co., Ltd. | Display panel, manufacturing method and drive method thereof, and display appratus |
| CN107331687A (en) * | 2017-07-11 | 2017-11-07 | 武汉华星光电半导体显示技术有限公司 | OLED display with double faces and preparation method thereof |
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