WO2015081640A1 - 一种oled器件及其制作方法、显示装置及电子产品 - Google Patents
一种oled器件及其制作方法、显示装置及电子产品 Download PDFInfo
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- WO2015081640A1 WO2015081640A1 PCT/CN2014/073442 CN2014073442W WO2015081640A1 WO 2015081640 A1 WO2015081640 A1 WO 2015081640A1 CN 2014073442 W CN2014073442 W CN 2014073442W WO 2015081640 A1 WO2015081640 A1 WO 2015081640A1
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 239000010410 layer Substances 0.000 claims abstract description 128
- 239000000463 material Substances 0.000 claims abstract description 82
- 238000000034 method Methods 0.000 claims abstract description 75
- 230000008569 process Effects 0.000 claims abstract description 73
- 239000002346 layers by function Substances 0.000 claims abstract description 50
- 230000007704 transition Effects 0.000 claims abstract description 50
- 230000005525 hole transport Effects 0.000 claims description 26
- 238000002207 thermal evaporation Methods 0.000 claims description 14
- 238000004770 highest occupied molecular orbital Methods 0.000 claims description 8
- 238000004776 molecular orbital Methods 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 2
- 239000000243 solution Substances 0.000 description 17
- 239000003086 colorant Substances 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000007738 vacuum evaporation Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000006798 recombination Effects 0.000 description 2
- 238000005215 recombination Methods 0.000 description 2
- 102100027094 Echinoderm microtubule-associated protein-like 1 Human genes 0.000 description 1
- 102100027126 Echinoderm microtubule-associated protein-like 2 Human genes 0.000 description 1
- 102100027095 Echinoderm microtubule-associated protein-like 3 Human genes 0.000 description 1
- 101001057941 Homo sapiens Echinoderm microtubule-associated protein-like 1 Proteins 0.000 description 1
- 101001057942 Homo sapiens Echinoderm microtubule-associated protein-like 2 Proteins 0.000 description 1
- 101001057939 Homo sapiens Echinoderm microtubule-associated protein-like 3 Proteins 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 125000005842 heteroatom Chemical group 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000012044 organic layer Substances 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000005019 vapor deposition process Methods 0.000 description 1
Classifications
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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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- 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]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
- H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
- H10K50/13—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit
- H10K50/131—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit with spacer layers between the electroluminescent layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
- H10K30/80—Constructional details
- H10K30/865—Intermediate layers comprising a mixture of materials of the adjoining active layers
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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
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] 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
- H10K50/80—Constructional details
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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
- H10K59/80—Constructional details
-
- 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
- H10K59/82—Interconnections, e.g. terminals
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2101/00—Properties of the organic materials covered by group H10K85/00
- H10K2101/10—Triplet emission
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2101/00—Properties of the organic materials covered by group H10K85/00
- H10K2101/40—Interrelation of parameters between multiple constituent active layers or sublayers, e.g. HOMO values in adjacent layers
Definitions
- Embodiments of the present invention relate to the field of display technologies, and in particular, to an OLED device, a manufacturing method thereof, a display device, and an electronic product.
- OLED Organic Light Emitting Diode
- LCD liquid crystal display
- OLED displays are lighter and thinner because they do not require a backlight.
- OLED displays are increasingly used in a variety of high-performance displays due to their high brightness, low power consumption, wide viewing angle, high response speed, and wide operating temperature range.
- the luminescence mechanism of OLED is that under the action of an applied electric field, electrons and holes are injected into the organic luminescent material from the positive and negative electrodes, respectively, so that migration, recombination and attenuation in the organic luminescent material emit light.
- a prior art OLED device has the structure shown in Figure 1, including an anode layer 10, a cathode layer 20, and an organic functional layer 30 between the two layers.
- the organic functional layer 30 may further include various functional layers including the electron transport layer 31, the hole transport layer 32, and the organic light-emitting layer.
- the organic light-emitting layer generally includes organic light-emitting materials of three colors of red, green and blue.
- the organic light-emitting layer may include a first light-emitting unit 331, a second light-emitting unit 332, and a second light-emitting unit 333 capable of emitting blue light, red light, and green light, respectively.
- the purpose of the OLED multilayer structure is to: Different functional layers have different functions, so that the various functions can be optimized individually. Interface characteristics are especially important between different functional layers. Because heterogeneous interfaces may contain a variety of complex physical mechanisms, such as energy conversion, carrier recombination, carrier separation, carrier injection, carrier accumulation, etc., in vacuum thermal evaporation technology, between different functional layers. The placement of the Q-tmie, the process environment, or the surface treatment prior to vacuum thermal evaporation is particularly important. The purpose is to make it possible to have a perfect interface between different materials forming different functional layers.
- Another existing Hybrid OLED device is a solution process from the Solution Process and the Vacuum Thermal Evaporation Process (VTE Process).
- VTE Process Vacuum Thermal Evaporation Process
- a fabricated OLED device On both sides of the interface of different processes, they are different materials. In the conversion of the two process processes, the hetero interface properties are inevitably affected, especially the luminescent layer.
- the functional layer including the hole transport layer 32, the second light emitting unit 332, and the third light emitting unit 333 is formed by a solution process, including the first light emitting unit 331, and electronic transmission.
- the film layer inside layer 31 is formed by a vacuum thermal evaporation process (VTE Process). Since the first illuminating unit and the second illuminating unit and the third illuminating unit are formed by different processes, the functions of the first illuminating unit and the second illuminating unit and the third illuminating unit are affected.
- a hybrid transition layer (HCL) formed by a vacuum thermal evaporation process is added to the interface alternated between the solution process and the vacuum thermal evaporation process.
- the efficiency and life of the first film layer formed by vacuum thermal evaporation can be improved.
- a mixed transition formed by a vacuum thermal evaporation process is disposed between the first light-emitting unit formed by the vacuum thermal evaporation process and the second light-emitting unit and the third light-emitting unit formed by the solution process.
- the layer (HCL) 40 can improve and improve the efficiency and lifetime of the first lighting unit.
- the mixed transition layer needs to have an electron transport function in the sub-pixels of the second light-emitting unit and the third light-emitting unit formed by the solution process, and the first light-emitting unit formed in the vacuum thermal evaporation process.
- the hole transmission function is provided in the sub-pixels. Therefore, the material of the HCL is difficult to select, and the carrier is difficult to balance, so that it is easy to emit the color of another sub-pixel in a certain sub-pixel.
- An object of the embodiments of the present invention is to provide an OLED device, a manufacturing method thereof, a display device, and an electronic product, which can solve the problem of unbalanced carrier transport in a mixed transition layer, thereby improving the lifetime of the OLED, lowering the operating voltage, and improving the efficiency.
- an OLED device includes at least a first electrode, a second electrode, and an organic functional layer between the first electrode and the second electrode, wherein the organic layer
- the functional layer includes at least a first functional layer formed by using the first process, and adopting a second portion of the functional layer formed by the second process, and a hybrid transition layer disposed between the first portion of the functional layer and the second portion of the functional layer.
- the mixed transition layer is formed by at least a first host material and a second host material, wherein a hole mobility of the first host material is greater than an electron mobility, and an electron mobility of the second host material is greater than a hole mobility .
- the first host material comprises at least a p-type host material; and the second host material comprises an N-type host material.
- the mixed transition layer has a triplet energy greater than 2, 1 eV.
- the organic functional layer includes: an electron transport layer located on a side close to the first electrode; a hole transport layer located on a side close to the second electrode; and a hole transport layer and a An organic light-emitting layer between the electron transport layers, the organic light-emitting layer comprising a first light-emitting unit located on a side close to the electron transport layer and a first layer disposed on a side close to the hole transport layer Two light emitting units and a third light emitting unit.
- the first partial functional layer includes the electron transport layer and the first light emitting unit;
- the second partial functional layer includes the hole transport layer, the second light emitting unit, and the second light emitting unit;
- the mixed transition layer is disposed between the first light emitting unit and the second light emitting unit and the third light emitting unit.
- a difference in molecular orbital energy level between the first host material in the mixed transition layer and the highest occupancy of the first light-emitting unit is less than 3 ev.
- the highest occupied molecular orbital energy level difference between the first host material and the hole transport layer in the mixed transition layer is less than 3 ev.
- the highest host molecular orbital energy level difference between the first host material of the mixed transition layer and the second light emitting unit and the third light emitting unit is greater than leV.
- the first light emitting unit is formed of a blue light emitting material
- the second light emitting unit is formed of a red light emitting material
- the third light emitting unit is formed of a green light emitting material.
- the mixed transition layer is formed by the first process.
- the first process includes a vacuum thermal evaporation process
- the second process includes a solution process
- a display device package a plurality of pixel units arranged in a matrix manner, wherein each pixel unit includes the above
- an electronic product comprising the display device as described above.
- a method of fabricating an OLED device comprising the steps of: Step A: sequentially forming a hole transport layer by a second process, located on a side adjacent to the hole transport layer and a second light emitting unit and a third light emitting unit disposed in the same layer; Step B, forming a mixed transition layer through the first process by using at least the first host material and the second host material, wherein a hole mobility of the first host material Above the electron mobility, the electron mobility of the second host material is greater than the hole mobility; and step C. sequentially forming the first light emitting unit and the electron transport layer by the first process.
- the hybrid transition layer of the OLED device according to the embodiment of the invention can simultaneously meet the functional requirements of electron transport and hole transport, solve the problem of unbalanced carrier transport in the mixed transition layer in the prior art, thereby improving the lifetime of the OLED and reducing the operating voltage. And the purpose of improving efficiency.
- FIG. 1 is a schematic structural view of an OLED device in the prior art
- FIG. 2 is a schematic structural view of a Hybnd OLED device in the prior art
- FIG. 3 is a schematic structural diagram of a Hybnd OLED device according to an embodiment of the present invention
- FIG. 4 is a flowchart of a method for manufacturing a Hybrid OLED device according to an embodiment of the present invention.
- the examples are only intended to illustrate the invention, but are not intended to limit the scope of the invention.
- an embodiment of the present invention provides an OLED device including at least a first electrode 100, a second electrode 200, and an organic functional layer between the first electrode 100 and the second electrode 200.
- the organic functional layer includes at least a first partial functional layer 310 formed using a first process and a second partial functional layer 320 formed using a second process.
- a hybrid transition layer 400 is disposed between the first partial functional layer 310 and the second partial functional layer 320.
- the hybrid transition layer 400 is formed using at least a first host material and a second host material.
- the first host material has a hole mobility greater than the electron mobility
- the second host material has an electron mobility greater than the hole mobility.
- At least a portion of the organic functional layer of the OLED device is formed using a first process, and at least another portion is formed by a second process.
- a mixed transition layer 400 is disposed in the interface between the two processes, and the mixed transition layer 400 is composed of at least a first host material having a hole mobility greater than an electron mobility and a second host material having an electron mobility greater than a hole mobility. form.
- the hybrid transition layer 400 made of the first host material and the second host material can simultaneously satisfy the electron transport and the empty
- the functional requirements of the hole transmission solve the problem of unbalanced carrier transmission in the hybrid transition layer (such as HCL 40, as shown in FIG. 2) in the prior art, thereby improving the lifetime of the OLED, achieving the purpose of reducing the operating voltage and improving the efficiency.
- the first host material may employ a P-type host material having a hole mobility greater than the electron mobility; and the second host material may employ an N-type host material having an electron mobility greater than a hole mobility.
- the mixed transition layer 400 has a triplet energy (Triplet Energy) greater than 2, 1 eV.
- first electrode 100 and the second electrode 200 may be, for example, an anode or a cathode.
- first electrode 100 is used as a cathode (Cathode)
- second electrode 200 is an anode (Anode) as an example, and is not limited thereto.
- the first process and the second process may specifically adopt any existing substrate production process capable of patterning.
- the first process is a vacuum vapor deposition process (VTE Process)
- the second process is a solution process (solution process) as an example, and is not limited thereto.
- the illustrated 0 LED device includes a first electrode 100, a second electrode 200, and an organic functional layer disposed between the first electrode 100 and the second electrode 200.
- the organic functional layer includes:
- An electron transport layer 301 (electron transport layer, ETL) located near the side of the first electrode 100;
- HTL hole transport layer 302
- EML Emitting Ivlaterial Layer
- the organic light emitting layer includes a first light emitting unit 303 (EML1), a second light emitting unit 304 (EML2), and a third light emitting unit 305 (EML3).
- EML1 first light emitting unit 303
- EML2 second light emitting unit 304
- EML3 third light emitting unit 305
- the first light emitting unit 303 is located on a side close to the electron transport layer 301; the second light emitting unit 304 and the third light emitting unit 305 are both located on a side close to the hole transport layer 302.
- the first partial functional layer 310 includes the electron transport layer 301 and the first light emitting unit 303; and the second partial functional layer 320 includes the hole transport layer 302 and the second light emitting unit 304.
- the third light emitting unit 305 is located on a side close to the electron transport layer 301; the second light emitting unit 304 and the third light emitting unit 305 are both located on a side close to the hole transport layer 302.
- the first partial functional layer 310 includes the electron transport layer 301 and the first light emitting unit 303; and the second partial functional layer 320 includes the hole transport layer 302 and the second light emitting unit 304.
- the third light emitting unit 305 is provided to the third light emitting unit 305.
- the hybrid transition layer 400 is formed between the first light emitting unit 303 and the second light emitting unit 304 and the third light emitting unit 305.
- the electron transport layer 301 and the first light emitting unit 303 in the organic functional layer are formed by a first process (VTE Process), the second light emitting unit 304, the third light emitting unit 305, and The hole transport layer 302 is formed using a second process (Solution Process).
- the mixed transition layer 400 is disposed between the first light emitting unit 303 formed by the vacuum evaporation film process and the second light emitting unit 304 and the third light emitting unit 305 formed by the solution process.
- the structure of the organic functional layer is not limited thereto.
- the organic functional layer may further include a hole injection layer and an electron injection layer.
- the hole injection layer may be located on a side of the hole transport layer 302 remote from the organic light-emitting layer, and the electron injection layer may be located on a side of the electron transport layer 301 remote from the organic light-emitting layer.
- alternating interfaces of the two processes may also be located between other functional layers of the organic functional layer.
- the alternate interface of the two processes is not located between the first light emitting unit 303 and the second light emitting unit 304, and the third light emitting unit 305, but between the organic light emitting layer and the electron transport layer 301.
- the mixed transition layer 400 is located between the organic light emitting layer and the electron transport layer 301. I will not list them one by one here.
- the first light emitting unit 303, the second light emitting unit 304, and the third light emitting unit 305 are respectively made of blue, green, and red luminescent materials. Of course, they can also be luminescent materials of other colors.
- the first light emitting unit 303 is formed of a blue light emitting material
- the second light emitting unit 304 is formed of a red light emitting material
- the third light emitting unit 305 is formed of a green light emitting material.
- the first light emitting unit 303 may also be formed of a green light emitting material
- the second light emitting unit 304 may be formed of a red light emitting material
- the third light emitting unit 305 may be formed of a blue light emitting material. I will not list them one by one here.
- the first lighting unit 303, the second lighting unit 304, and the third lighting unit 305 are arranged in two layers.
- the first illumination The unit 303, the second lighting unit 304, and the third lighting unit 305 may also be arranged in a three-layer arrangement.
- the number of the light emitting units in the organic light emitting layer and the arrangement manner of the light emitting units are not limited.
- the mixed transition layer 400 is formed by, for example, the same process as the first partial functional layer 310, that is, the first process (vacuum evaporation film process).
- the first host material in the mixed transition layer 400 and the highest occupied molecular orbital of the first light-emitting unit 303 (Highest occupied molecule orbital, HOMO)
- the energy level difference is less than 3 ev.
- the highest occupied molecular orbital level difference between the first host material and the hole transport layer 302 in the mixed transition layer 400 is less than 3 ev; the first host material of the mixed transition layer 400 and the second light emitting unit 304,
- the highest occupied molecular orbital energy level difference of the third light emitting unit 305 is greater than leV.
- step 401 in fabricating an OLED device according to an embodiment of the present invention, step 401, first, forming a hole transport layer, a second light emitting unit, and a light emitting unit, for example, by a solution process; step 402, and then, for example, The vacuum evaporation film process forms a mixed transition layer; in step 403, the first light emitting unit and the electron transport layer are sequentially formed, for example, by a vacuum evaporation film process.
- Embodiments of the present invention also provide a display device including a plurality of pixel units, each of which includes an OLED device provided by an embodiment of the present invention.
- each pixel unit of the display device has one or more colors.
- the organic light-emitting layer of the OLED device includes a first light-emitting unit, a second light-emitting unit, and a first light-emitting unit capable of emitting blue, red, and green, respectively.
- the OLED device is not limited to including a plurality of light emitting units, and is not limited to the above three light emitting units, and may further include a plurality of light emitting units emitting other colors.
- the display device provided by the embodiment of the present invention is provided with a mixed transition layer 400 formed by, for example, a vacuum thermal evaporation process in two alternate processes of the organic functional layer.
- the mixed transition layer 400 comprises two or more materials, and usually comprises a P-type host material and an N-type host material, and the mixed transition layer 400 is formed on the sub-pixels of a plurality of colors.
- Embodiments of the present invention also provide an electronic product including at least the display device as described above.
- the electronic products are, for example, mobile phones, computers, televisions, digital cameras, and the like.
- the above is a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.
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Priority Applications (1)
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US14/381,641 US9412976B2 (en) | 2013-12-02 | 2014-03-14 | Organic light emitting diode device and method for manufacturing the same, display device and electronic product |
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CN201310634869.7 | 2013-02-12 | ||
CN201310634869.7A CN103682116A (zh) | 2013-12-02 | 2013-12-02 | 一种oled器件及显示装置 |
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CN104022229A (zh) | 2014-05-30 | 2014-09-03 | 京东方科技集团股份有限公司 | Oled器件及其制备方法、显示装置 |
CN104600201A (zh) * | 2015-01-30 | 2015-05-06 | 京东方科技集团股份有限公司 | 一种有机电致发光器件及其制备方法、显示装置 |
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US9412976B2 (en) | 2016-08-09 |
US20150162559A1 (en) | 2015-06-11 |
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