CN105336874A - Organic light emitting diode, driving method thereof and organic light emitting display screen - Google Patents
Organic light emitting diode, driving method thereof and organic light emitting display screen Download PDFInfo
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- CN105336874A CN105336874A CN201510902268.9A CN201510902268A CN105336874A CN 105336874 A CN105336874 A CN 105336874A CN 201510902268 A CN201510902268 A CN 201510902268A CN 105336874 A CN105336874 A CN 105336874A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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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
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/301—Details of OLEDs
- H10K2102/302—Details of OLEDs of OLED structures
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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Abstract
An organic light emitting diode comprises a third electrode arranged on the side of a multi-layer structure. An electric field is formed by the third electrode and at least one of a first electrode and a second electrode by applying voltage (third voltage) on the third electrode. Electrons and holes can be controlled to converge on a needed light emitting layer by controlling the electric field, and therefore excitons are generated for exciting the light emitting layer to emit light. The organic light emitting diode comprises at least two light emitting layers. Each light emitting layer emits light of one color. The electrons and the holes can be controlled to converge on any light emitting layer by controlling the electric field, and therefore the organic light emitting diode is driven to emit light of different colors. The invention further discloses a driving method of the organic light emitting diode and an organic light emitting display screen.
Description
Technical field
The present invention relates to organic light emitting display field, particularly relate to a kind of Organic Light Emitting Diode and driving method, organic light emitting display.
Background technology
Organic light emitting display is the display screen of a kind of application Organic Light Emitting Diode (OLED) as luminescent device, compare present main flow flat panel display Thin Film Transistor-LCD (TFT-LCD), organic light emitting display has the advantages such as high-contrast, wide viewing angle, low-power consumption, volume be thinner, being expected to the flat panel display of future generation become after LCD, is one of the maximum technology that receives publicity in current flat panel display.
Tradition OLED makes laminated construction usually, and the OLED of this laminated construction can save mask plate, and can improve yield.But the OLED of conventional stacked architectures, is generally white light OLED, the display of polychrome cannot be realized.The direction of an electric field of OLED structure is all the vertical direction at negative electrode and positive electrode usually, and such vertical stratification exists some problems, such as, easily occur that electronics or hole are gone to unwanted rete and got on thus cause luminous abnormal.
Summary of the invention
Based on this, be necessary to provide a kind of Organic Light Emitting Diode and the driving method thereof that can realize the laminated construction of multicolor displaying.In addition, a kind of organic light emitting display is also provided.
A kind of Organic Light Emitting Diode, it comprises the first electrode, sandwich construction and the second electrode that stacked on top is arranged, described sandwich construction at least comprises two-layer luminescent layer, a kind of light of color launched by every layer of described luminescent layer, described sandwich construction can launch the light of at least two kinds of colors, wherein said Organic Light Emitting Diode also comprises third electrode, and described third electrode is positioned at the side of the first electrode and the second electrode.Wherein in an embodiment, the length of described third electrode on stacked direction is more than or equal to the half of the first electrode, sandwich construction and the second electrode superposition thickness.
Wherein in an embodiment, described sandwich construction comprises the three-colour light-emitting layer of the first look luminescent layer of transmitting first coloured light, the second look luminescent layer launching the second coloured light and transmitting the 3rd coloured light.
Wherein in an embodiment, described first look, the second look and the 3rd look are red, green and blue combination in any.
Wherein in an embodiment, between described luminescent layer, be also provided with high triplet energy level material layer.
Wherein in an embodiment, described high triplet energy level material layer at least comprises UGH-2, m-CP, CDBP, TCTEB, CBF wherein a kind of material.
A kind of driving method of Organic Light Emitting Diode, be applied to above-mentioned Organic Light Emitting Diode, first voltage is applied to described first electrode, second voltage is applied to described second electrode, tertiary voltage is applied to described third electrode, to make described first electrode and described second electrode form electric field, in described first electrode and described second electrode, at least one of them and described third electrode form electric field.
Wherein in an embodiment, in described first electrode and described second electrode, one of them and described third electrode form electric field.
Wherein in an embodiment, the magnitude of voltage of described tertiary voltage is at least changing value in setting duration.
Wherein in an embodiment, in described first electrode and described second electrode, at least one of them and described third electrode form electric field, to encourage one deck light emitting layer luminesces preset in described sandwich construction.
Above-mentioned Organic Light Emitting Diode, comprises the third electrode of the side being arranged at sandwich construction, can by applying voltage (tertiary voltage) at third electrode, and to make in the first electrode and the second electrode, at least one of them and third electrode form electric field.By the control to this electric field, electronics can be controlled and hole merges in required luminescent layer, thus produce exciton and encourage this light emitting layer luminesces.Above-mentioned Organic Light Emitting Diode comprises at least two-layer luminescent layer, and a kind of light of color launched by every layer of luminescent layer.By the control to this electric field, electronics can be controlled and hole merges in arbitrary luminescent layer, thus drive Organic Light Emitting Diode to realize multicolor luminous.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, the accompanying drawing of other embodiments can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of Organic Light Emitting Diode of the present invention;
Fig. 2 is the structural representation of sandwich construction in Fig. 1.
Embodiment
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully.Preferred embodiment of the present invention is given in accompanying drawing.But the present invention can realize in many different forms, is not limited to embodiment described herein.On the contrary, provide the object of these embodiments be make the understanding of disclosure of the present invention more comprehensively thorough.
Unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present invention understand usually.The object of term used in the description of the invention herein just in order to describe specific embodiment, is not intended to limit the present invention.Term as used herein "and/or" comprises arbitrary and all combinations of one or more relevant Listed Items.
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Fig. 1 is the structural representation of Organic Light Emitting Diode, and Fig. 2 is the structural representation of sandwich construction in Fig. 1, sees also Fig. 1 and Fig. 2.
A kind of Organic Light Emitting Diode, comprising: be formed at the first electrode 100 on substrate 10, be formed at sandwich construction 400 on the first electrode 100, be formed at the second electrode 200 on sandwich construction 400 and be formed at the third electrode 300 of side of sandwich construction 400.
" being formed at " in above-mentioned can be direct formation, also can be indirect formation.Usual employing is formed indirectly, namely also comprises other dielectric layers between.Such as, the first electrode 100 is formed on substrate 10, can also include protective layer, such as water oxygen barrier layer between the first electrode 100 and substrate 10.Again such as, the second electrode 200 is formed on sandwich construction 400, also can include protective layer, such as water oxygen barrier layer between the second electrode 200 and sandwich construction 400.Water oxygen barrier layer can be the structure of multilayer, such as, comprise mutually overlapping organic layer and inorganic layer, or the inorganic layer of multilayer.Inorganic layer can be metal oxide, such as titanium oxide, magnesium oxide, aluminium oxide, zirconia, tin oxide, can also be the nitride of silicon or the oxide of silicon.Inorganic layer thickness is 50 ~ 100nm, and organic layer thickness is 100 ~ 200nm.Water oxygen barrier layer can be applied atom layer deposition process (ALD, Atomiclayerdeposition) and be formed.
Described first electrode 100 is anode, and its material can plug with molten metal tin (ITO) for oxidation, and thickness is at about 100nm.Described second electrode 200 is negative electrode, and its material can be conducting metal (such as silver, magnesium or its alloy), and thickness is at about 100nm.In other embodiments, the first electrode 100 also can be conducting metal (such as silver), and the second electrode 200 can be tin indium oxide (ITO).
Sandwich construction 400 is arranged between the first electrode 100 and the second electrode 200.Sandwich construction 400 comprises at least two-layer luminescent layer, and a kind of light of color launched by every layer of luminescent layer, and sandwich construction 400 can launch the light of at least two kinds of colors.In the present embodiment, sandwich construction 400 comprises the luminescent layer of three layers, and a kind of light of color launched by every layer of luminescent layer, and sandwich construction 400 can launch the light of at least three kinds of colors.Such as, sandwich construction 400 comprises the three-colour light-emitting layer 430 of the first look luminescent layer 410 of transmitting first coloured light, the second look luminescent layer 420 launching the second coloured light and transmitting the 3rd coloured light successively.First look, the second look and the 3rd look are red, green and blue combination in any.Such as in the present embodiment, from the first electrode 100 to the second electrode 200, sandwich construction 400 comprises the red light emitting layer launching the blue light-emitting layer of blue light, the green light emitting layer of transmitting green light and red-emitting successively.Certainly, the first look, the second look and the 3rd look can also be other color combination.The thickness of luminescent layer can at about 20nm ~ 40nm, such as about 30nm; The thickness of sandwich construction 400 can at about 100nm ~ 300nm, such as about 200nm.
When formation exciton is converged at luminescent layer in electronics and hole, exciton is the movable rete to other from this luminescent layer possibly, such as the movable luminescent layer to other.So just may impact glow color, occur luminous abnormal situation.In order to stop exciton activity to other rete, high triplet energy level material layer can be provided with between luminescent layer.Such as, high triplet energy level material layer 440 can be provided with between the first look luminescent layer 410 and the second look luminescent layer 420, between the second look luminescent layer 420 and three-colour light-emitting layer 430, also be provided with high triplet energy level material layer 440.High triplet energy level material layer 440 at least comprises UGH-2, m-CP, CDBP, TCTEB, CBF wherein a kind of material.
Usual sandwich construction 400 comprises the structures such as electron transfer layer, luminescent layer, hole transmission layer, hole injection layer.Such as sandwich construction 400 can comprise the first lamination 401, second lamination 402 and luminous layer structure 403, first lamination 401 is arranged between the first electrode 100 and luminous layer structure 403, and the second lamination 402 is arranged between the second electrode 200 and luminous layer structure 403.Luminous layer structure 403 comprises the first look luminescent layer 410, second look luminescent layer 420 and three-colour light-emitting layer 430.When the first electrode 100 be anode, the second electrode 200 for negative electrode time, the first lamination 401 generally includes hole transmission layer, hole injection layer, and the second lamination 402 generally includes electron transfer layer.
Third electrode 300 is formed on substrate 10, the side of sandwich construction 400.Third electrode 300 length is in the stacking direction greater than or equal to the half of the first electrode, sandwich construction and the second electrode superposition thickness.Such as, the height of third electrode 300 on stack direction can equal the half of the first electrode, sandwich construction and the second electrode superposition thickness.In order to reach the control to luminescent layer, third electrode 300 at least will be arranged at the region of the thickness direction of luminous layer structure 403, such as, include the region of the first look luminescent layer 410, second look luminescent layer 420` and three-colour light-emitting layer 430 thickness direction.Should mutual insulating between first electrode 100, second electrode 200 and third electrode 300.
Third electrode 300 can be conducting metal (such as silver, magnesium or its alloy), can be electrified pressure, such as negative voltage.Thus, when the first electrode 100 be anode, the second electrode 200 for negative electrode time, electric field is defined between first electrode 100 and the second electrode 200, electric field is also form between first electrode 100 and third electrode 300, by the control to this electric field, electronics can be controlled and hole merges in required luminescent layer, thus produce exciton and encourage this light emitting layer luminesces.Above-mentioned Organic Light Emitting Diode comprises at least two-layer luminescent layer, and a kind of light of color launched by every layer of luminescent layer.By the control to this electric field, electronics can be controlled and hole merges in arbitrary luminescent layer, thus drive Organic Light Emitting Diode to realize multicolor luminous.
A kind of driving method being applied to the Organic Light Emitting Diode of above-mentioned Organic Light Emitting Diode of following discloses.
This driving method comprises: apply the first voltage V1 to the first electrode 100, second voltage V2 is applied to the second electrode 200, tertiary voltage V3 is applied to third electrode 300, to make the first electrode 100 and the second electrode 200 form electric field, in the first electrode 100 and the second electrode 200, at least one of them and third electrode 300 form electric field.
As long as the magnitude of voltage of V1, V2 and V3 is different, between three electrodes, electric field will be produced.When the first electrode 100 be anode, the second electrode 200 for negative electrode time, negative voltage is applied to third electrode, the first electric field is defined between first electrode 100 and the second electrode 200, the second electric field is also form, usually main concern the first electric field and the second electric field between first electrode 100 and third electrode 300.By the movement at laminated construction thickness direction of the first electric field controls electronics and hole, by the movement in laminated construction transverse direction of the second electric field controls electronics and hole, thus luminescent layer electronics and hole being directed to needs converges.(presetting) first luminescent layer 410 such as electronics and hole being directed to needs converges, thus generation exciton encourages the first luminescent layer 410 luminescence (such as blue light); The second luminescent layer 420 or the 3rd luminescent layer 430 that such as electronics and hole are directed to again needs converge, thus generation exciton encourages the second luminescent layer 420 or the 3rd luminescent layer 430 luminescence (such as green glow or ruddiness).Therefore, that above-mentioned Organic Light Emitting Diode can be driven to realize is multicolor luminous for above-mentioned driving method.
In order to reach the object accurately controlled electronics and hole, the magnitude of voltage of tertiary voltage V3 can be steady state value, also can be variate.The magnitude of voltage that such as can arrange tertiary voltage V3 is at least changing value in setting duration.Can arrange tertiary voltage V3 and comprise multiple cycle, in each cycle, the magnitude of voltage of tertiary voltage V3 changes with identical rule.
Also disclose a kind of organic light emitting display applying above-mentioned Organic Light Emitting Diode, this organic light emitting display comprises multiple above-mentioned Organic Light Emitting Diode, can be applied among such as mobile phone, panel computer, navigator, ATM etc. human-computer interaction device.
The diagram being appreciated that in Fig. 1 ~ Fig. 2 is the simple examples of some primary structures to Organic Light Emitting Diode, does not represent the entire infrastructure of Organic Light Emitting Diode.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. an Organic Light Emitting Diode, it comprises the first electrode, sandwich construction and the second electrode that stacked on top is arranged, described sandwich construction at least comprises two-layer luminescent layer, a kind of light of color launched by every layer of described luminescent layer, described sandwich construction can launch the light of at least two kinds of colors, it is characterized in that: described Organic Light Emitting Diode also comprises third electrode, described third electrode is positioned at the side of the first electrode and the second electrode.
2. Organic Light Emitting Diode according to claim 1, is characterized in that:
The length of described third electrode on stacked direction is more than or equal to the half of the first electrode, sandwich construction and the second electrode superposition thickness.
3. Organic Light Emitting Diode according to claim 1, is characterized in that:
Described sandwich construction comprises the three-colour light-emitting layer of the first look luminescent layer of transmitting first coloured light, the second look luminescent layer launching the second coloured light and transmitting the 3rd coloured light.
4. Organic Light Emitting Diode according to claim 3, is characterized in that:
Described first look, the second look and the 3rd look are red, green and blue combination in any.
5. Organic Light Emitting Diode according to claim 1, is characterized in that:
High triplet energy level material layer is also provided with between described luminescent layer.
6. Organic Light Emitting Diode according to claim 5, is characterized in that:
Described high triplet energy level material layer at least comprises UGH-2, m-CP, CDBP, TCTEB, CBF wherein a kind of material.
7. a driving method for Organic Light Emitting Diode, is applied to the Organic Light Emitting Diode according to any one of claim 1 ~ 6, it is characterized in that:
First voltage is applied to described first electrode, second voltage is applied to described second electrode, tertiary voltage is applied to described third electrode, to make described first electrode and described second electrode form electric field, in described first electrode and described second electrode, at least one of them and described third electrode form electric field.
8. the driving method of Organic Light Emitting Diode according to claim 7, is characterized in that:
In described first electrode and described second electrode, one of them and described third electrode form electric field.
9. the driving method of Organic Light Emitting Diode according to claim 7, is characterized in that:
The magnitude of voltage of described tertiary voltage is at least changing value in setting duration.
10. the driving method of Organic Light Emitting Diode according to claim 7, is characterized in that:
In described first electrode and described second electrode, at least one of them and described third electrode form electric field, to encourage one deck light emitting layer luminesces preset in described sandwich construction.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109599426A (en) * | 2018-12-11 | 2019-04-09 | 上海天马有机发光显示技术有限公司 | Display panel and display device |
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| CN104124348A (en) * | 2014-07-04 | 2014-10-29 | 清华大学 | Adjustable-color grapheme-based thin-film electroluminescence device and preparation method thereof |
| JP5695312B2 (en) * | 2009-10-27 | 2015-04-01 | ローム株式会社 | Organic EL device |
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| JP5695312B2 (en) * | 2009-10-27 | 2015-04-01 | ローム株式会社 | Organic EL device |
| CN102651452A (en) * | 2011-02-24 | 2012-08-29 | 海洋王照明科技股份有限公司 | White light electrogenerated light-emitting apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109599426A (en) * | 2018-12-11 | 2019-04-09 | 上海天马有机发光显示技术有限公司 | Display panel and display device |
| CN109599426B (en) * | 2018-12-11 | 2021-03-02 | 上海天马有机发光显示技术有限公司 | Display panel and display device |
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