CN105957975A - High-efficiency series OLED device - Google Patents
High-efficiency series OLED device Download PDFInfo
- Publication number
- CN105957975A CN105957975A CN201610429838.1A CN201610429838A CN105957975A CN 105957975 A CN105957975 A CN 105957975A CN 201610429838 A CN201610429838 A CN 201610429838A CN 105957975 A CN105957975 A CN 105957975A
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- Prior art keywords
- layer
- oled device
- organic
- electron
- electroluminescence cell
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- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Inorganic materials O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000007769 metal material Substances 0.000 claims abstract description 18
- 238000000605 extraction Methods 0.000 claims abstract description 16
- 239000000758 substrate Substances 0.000 claims abstract description 15
- 238000002347 injection Methods 0.000 claims abstract description 12
- 239000007924 injection Substances 0.000 claims abstract description 12
- 239000011368 organic material Substances 0.000 claims description 32
- 238000005401 electroluminescence Methods 0.000 claims description 29
- 230000005540 biological transmission Effects 0.000 claims description 26
- 230000027756 respiratory electron transport chain Effects 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 14
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- MRNHPUHPBOKKQT-UHFFFAOYSA-N indium;tin;hydrate Chemical compound O.[In].[Sn] MRNHPUHPBOKKQT-UHFFFAOYSA-N 0.000 claims description 3
- 238000003475 lamination Methods 0.000 claims 1
- 238000005457 optimization Methods 0.000 abstract description 7
- 230000003064 anti-oxidating effect Effects 0.000 abstract description 5
- 238000006479 redox reaction Methods 0.000 abstract description 5
- 238000009792 diffusion process Methods 0.000 abstract description 4
- 230000005525 hole transport Effects 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 125
- 238000005516 engineering process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005286 illumination Methods 0.000 description 2
- 239000000969 carrier Substances 0.000 description 1
- 239000002346 layers by function Substances 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- 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
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/17—Carrier injection layers
- H10K50/171—Electron injection layers
-
- 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
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/14—Carrier transporting layers
- H10K50/16—Electron transporting layers
Abstract
The invention discloses a high-efficiency series OLED device, which comprises a substrate, wherein an ITO anode is arranged at the top part of the substrate; a hole injection layer is arranged at the top part of the ITO anode; a first electroluminescent unit is arranged at the top part of the hole injection layer and comprises a first hole transport layer, a first organic light-emitting layer and a first electron transport layer; the first electron transport layer is located at the top part of the first organic light-emitting layer; the first organic light-emitting layer is located at the top part of the first hole transport layer; and a middle connection layer is arranged at the top part of the first electroluminescent unit and comprises an electron extraction layer and an electron receiving layer. Transverse current diffusion caused by oxidation-reduction reaction of an Al-MoO3 interface is eliminated by an anti-oxidation layer C60 and thickness optimization of a metal material of the middle connection layer is achieved, so that the performance of the device is improved, the efficiency of the device can be improved and efficiency sliding and relatively low drive voltage are reduced.
Description
Technical field
The present invention relates to organic light emitting diode device technical field, particularly relate to a kind of high efficiency tandem OLED device.
Background technology
Organic Light Emitting Diode as a kind of brand-new semiconductor light emitting technology, its huge applications in terms of display field and illumination, the most of great interest；In order to make OLED enter display and lighting field faster, need to improve further the performance of OLED, and the progress along with technology, display and illumination market will develop to large scale OLED direction, and owing to OLED is current driving apparatus, large-sized OLED needs big electric current, and its brightness is proportional to electric current density, but its life-span is inversely proportional to electric current density；In order to significantly improve the device performance of large scale OLED and increase its life-span, tandem OLED is suggested.
Tandem OLED device stacks several EL unit by articulamentum and uses single power drives to be formed；Compared with tradition OLED, separate between tandem OLED device each EL module, select, in collocation, there is greater flexibility at material, and performance optimization can be carried out the most respectively, be also easy to realize the regulation to color simultaneously；Tandem OLED is under identical driving electric current, and the increase of luminosity makes luminous efficiency also increase as；For tandem OLED device, intermediate connecting layer plays vital effect；Intermediate connecting layer not only has the effect connecting each luminescence unit, is also responsible for the production of electric charge, transmission and injects carriers into the effect of each functional layer material；Therefore, the design of intermediate connecting layer and optimization also become the pith of tandem OLED device research work.
Summary of the invention
The technical problem existed based on background technology, the present invention proposes high efficiency tandem OLED device.
nullThe high efficiency tandem OLED device that the present invention proposes，Including substrate，The top of described substrate is provided with ito anode，And the top of ito anode is provided with hole injection layer，The top of described hole injection layer is provided with the first electroluminescence cell，Described first electroluminescence cell includes the first hole transmission layer、First organic luminous layer and the first electron transfer layer，Described first electron transfer layer is positioned at the top of the first organic luminous layer，And first organic luminous layer be positioned at the top of the first hole transmission layer，The top of described first electroluminescence cell is provided with intermediate connecting layer，Described intermediate connecting layer includes electron extraction layer and electronics receiving layer，Described electronics receiving layer is positioned at the top of electron extraction layer，And electron extraction layer includes the first organic material layer、Metal material layer and the second organic material layer，Described first organic material layer is positioned at the bottom of metal material layer，And second organic material layer be positioned at the top of metal material layer，The top of described intermediate connecting layer is provided with the second electroluminescence cell，Described second electroluminescence cell includes the second hole transmission layer、Second organic luminous layer and the second electron transfer layer，Described second electron transfer layer is positioned at the top of the second organic luminous layer，And second organic luminous layer be positioned at the top of the second hole transmission layer，The top of described second electroluminescence cell is provided with electron injecting layer，The top of described electron injecting layer is provided with negative electrode.
Preferably, described substrate is the glass base that light transmission is good.
Preferably, described ito anode is tin indium oxide, and light is engraved on the top of substrate, and described negative electrode is metallic aluminium negative electrode.
Preferably, described hole injection layer is that MoO3 material is made.
Preferably, described first electroluminescence cell is made up of the first hole transmission layer, the first organic luminous layer and the first electric transmission layer laminate, and first hole transmission layer be that CBP material is made, first organic luminous layer is that green light luminescent material is made, and described second electroluminescence cell and the first electroluminescence cell structure are identical.
Preferably, described intermediate connecting layer is stacked by electron extraction layer and electronics receiving layer and forms, and electron extraction layer is that the first organic material layer, metal material layer and the second organic material layer stacking form, and electronics receiving layer is that MoO3 material is made.
Preferably, described first organic material layer is that organic material Liq makes, and the second organic material layer is that organic material C60 makes.
In the present invention, the diffusion of the transverse current caused by redox reaction that described high efficiency tandem OLED device utilizes anti oxidation layer C60 to eliminate Al-MoO3 interface realizes the thickness optimization of intermediate connecting layer metal material thus improves device performance, it is possible to improves the efficiency of device and reduces the landing of efficiency and relatively low driving voltage.
Accompanying drawing explanation
Fig. 1 is the structural representation of the high efficiency tandem OLED device that the present invention proposes；
Fig. 2 be the high efficiency tandem OLED device that the present invention proposes intermediate connecting layer in metal material layer thickness change electric current density-luminance vs. voltage graph.
In figure: 1 substrate, 2
Ito anode, 3 hole injection layers, 4 first electroluminescence cells, 41 first hole transmission layers, 42 first organic luminous layers, 43 first electron transfer layers, 5 intermediate connecting layers, 511 first organic material layers, 512 metal material layers, 513 second organic material layers, 52 electronics receiving layers, 6 second electroluminescence cells, 61 second hole transmission layers, 62 second organic luminous layers, 63 the 3rd electron transfer layers, 7 electron injecting layers, 8 negative electrodes.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is explained orally further.
Embodiment
nullWith reference to Fig. 1-2，The present embodiment proposes high efficiency tandem OLED device，Including substrate 1，The top of substrate 1 is provided with ito anode 2，And the top of ito anode 2 is provided with hole injection layer 3，The top of hole injection layer 3 is provided with the first electroluminescence cell 4，First electroluminescence cell 4 includes the first hole transmission layer 41、First organic luminous layer 42 and the first electron transfer layer 43，First electron transfer layer 43 is positioned at the top of the first organic luminous layer 42，And first organic luminous layer 42 be positioned at the top of the first hole transmission layer 41，The top of the first electroluminescence cell 4 is provided with intermediate connecting layer 5，Intermediate connecting layer 5 includes electron extraction layer and electronics receiving layer 52，Electronics receiving layer 52 is positioned at the top of electron extraction layer，And electron extraction layer includes the first organic material layer 511、Metal material layer 512 and the second organic material layer 513，First organic material layer 511 is positioned at the bottom of metal material layer 512，And second organic material layer 513 be positioned at the top of metal material layer 512，The top of intermediate connecting layer 5 is provided with the second electroluminescence cell 6，Second electroluminescence cell 6 includes the second hole transmission layer 61、Second organic luminous layer 62 and the second electron transfer layer 63，Second electron transfer layer 63 is positioned at the top of the second organic luminous layer 62，And second organic luminous layer 62 be positioned at the top of the second hole transmission layer 61，The top of the second electroluminescence cell 6 is provided with electron injecting layer 7，The top of electron injecting layer 7 is provided with negative electrode 8，The diffusion of the transverse current caused by redox reaction that high efficiency tandem OLED device utilizes anti oxidation layer C60 to eliminate Al-MoO3 interface realizes the thickness optimization of intermediate connecting layer metal material thus improves device performance，The efficiency of device can be improved and reduce the landing of efficiency and relatively low driving voltage.
nullIn the present embodiment，Substrate 1 is the glass base that light transmission is good，Ito anode 2 is tin indium oxide，And light is engraved on the top of substrate 1，Negative electrode 8 is metallic aluminium negative electrode，Hole injection layer is that MoO3 material is made，First electroluminescence cell is by the first hole transmission layer、First organic luminous layer and the first electric transmission layer laminate composition，And first hole transmission layer be that CBP material is made，First organic luminous layer is that green light luminescent material is made，Second electroluminescence cell and the first electroluminescence cell structure are identical，Intermediate connecting layer 5 is stacked by electron extraction layer and electronics receiving layer 52 and forms，And electron extraction layer is the first organic material layer 511、Metal material layer 512 and the second organic material layer 513 stacking form，Electronics receiving layer 52 is made for MoO3 material，First organic material layer 511 is made for organic material Liq，And second organic material layer 513 make for organic material C60，The diffusion of the transverse current caused by redox reaction that high efficiency tandem OLED device utilizes anti oxidation layer C60 to eliminate Al-MoO3 interface realizes the thickness optimization of intermediate connecting layer metal material thus improves device performance，The efficiency of device can be improved and reduce the landing of efficiency and relatively low driving voltage.
In the present embodiment, intermediate connecting layer 5 structure is Liq/Al/C60/CBP:MoO3, the redox reaction that this structure eliminates Al-MoO3 interface by utilizing anti oxidation layer C60 realizes the thickness optimization of intermediate connecting layer metal Al thus improves device performance, it is achieved tandem OLED device current efficiency exceedes the twice of single OLED current efficiency；Wherein when Al thickness is 3nm, device efficiency is optimal, and current efficiency reaches 155.6cd/A, is 2.1 times of single OLED current efficiency.
The above; it is only the present invention preferably detailed description of the invention; but protection scope of the present invention is not limited thereto; any those familiar with the art is in the technical scope that the invention discloses; according to technical scheme and inventive concept equivalent or change in addition thereof, all should contain within protection scope of the present invention.
Claims (7)
- null1. high efficiency tandem OLED device，Including substrate (1)，It is characterized in that，The top of described substrate (1) is provided with ito anode (2)，And the top of ito anode (2) is provided with hole injection layer (3)，The top of described hole injection layer (3) is provided with the first electroluminescence cell (4)，Described first electroluminescence cell (4) includes the first hole transmission layer (41)、First organic luminous layer (42) and the first electron transfer layer (43)，Described first electron transfer layer (43) is positioned at the top of the first organic luminous layer (42)，And first organic luminous layer (42) be positioned at the top of the first hole transmission layer (41)，The top of described first electroluminescence cell (4) is provided with intermediate connecting layer (5)，Described intermediate connecting layer (5) includes electron extraction layer and electronics receiving layer (52)，Described electronics receiving layer (52) is positioned at the top of electron extraction layer，And electron extraction layer includes the first organic material layer (511)、Metal material layer (512) and the second organic material layer (513)，Described first organic material layer (511) is positioned at the bottom of metal material layer (512)，And second organic material layer (513) be positioned at the top of metal material layer (512)，The top of described intermediate connecting layer (5) is provided with the second electroluminescence cell (6)，Described second electroluminescence cell (6) includes the second hole transmission layer (61)、Second organic luminous layer (62) and the second electron transfer layer (63)，Described second electron transfer layer (63) is positioned at the top of the second organic luminous layer (62)，And second organic luminous layer (62) be positioned at the top of the second hole transmission layer (61)，The top of described second electroluminescence cell (6) is provided with electron injecting layer (7)，The top of described electron injecting layer (7) is provided with negative electrode (8).
- High efficiency tandem OLED device the most according to claim 1, it is characterised in that described substrate (1) is the glass base that light transmission is good.
- High efficiency tandem OLED device the most according to claim 1, it is characterised in that described ito anode (2) is tin indium oxide, and light is engraved on the top of substrate (1), described negative electrode (8) is metallic aluminium negative electrode.
- High efficiency tandem OLED device the most according to claim 1, it is characterised in that described hole injection layer (3) is that MoO3 material is made.
- High efficiency tandem OLED device the most according to claim 1, it is characterized in that, described first electroluminescence cell (4) is made up of the first hole transmission layer (41), the first organic luminous layer (42) and the first electron transfer layer (43) lamination, and first hole transmission layer (41) be that CBP material is made, first organic luminous layer (42) is that green light luminescent material is made, and described second electroluminescence cell (6) is identical with the first electroluminescence cell (4) structure.
- High efficiency tandem OLED device the most according to claim 1, it is characterized in that, described intermediate connecting layer (5) is stacked by electron extraction layer and electronics receiving layer (52) and forms, and electron extraction layer is that the first organic material layer (511), metal material layer (512) and the second organic material layer (513) stacking form, electronics receiving layer (52) is that MoO3 material is made.
- High efficiency tandem OLED device the most according to claim 6, it is characterised in that described first organic material layer (511) is that organic material Liq makes, and the second organic material layer (513) is that organic material C60 makes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610429838.1A CN105957975A (en) | 2016-06-13 | 2016-06-13 | High-efficiency series OLED device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610429838.1A CN105957975A (en) | 2016-06-13 | 2016-06-13 | High-efficiency series OLED device |
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| CN105957975A true CN105957975A (en) | 2016-09-21 |
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| CN201610429838.1A Pending CN105957975A (en) | 2016-06-13 | 2016-06-13 | High-efficiency series OLED device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108878264A (en) * | 2018-06-29 | 2018-11-23 | 云南大学 | A kind of preparation method of metal oxide stack field-effect material |
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Effective date of abandoning: 20240419 |