WO2021134830A1 - Oled显示面板以及显示装置 - Google Patents

Oled显示面板以及显示装置 Download PDF

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Publication number
WO2021134830A1
WO2021134830A1 PCT/CN2020/071881 CN2020071881W WO2021134830A1 WO 2021134830 A1 WO2021134830 A1 WO 2021134830A1 CN 2020071881 W CN2020071881 W CN 2020071881W WO 2021134830 A1 WO2021134830 A1 WO 2021134830A1
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WO
WIPO (PCT)
Prior art keywords
light
color area
emitting color
different
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2020/071881
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English (en)
French (fr)
Inventor
史婷
刘扬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Application filed by Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Publication of WO2021134830A1 publication Critical patent/WO2021134830A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00Organic light-emitting devices
    • H10K50/10OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/17Carrier injection layers
    • H10K50/171Electron injection layers
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00Organic light-emitting devices
    • H10K50/10OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/14Carrier transporting layers
    • H10K50/16Electron transporting layers
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30Devices specially adapted for multicolour light emission
    • H10K59/35Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H10K59/353Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels characterised by the geometrical arrangement of the RGB subpixels

Definitions

  • This application relates to the field of display technology, and in particular to an OLED display panel and a display device.
  • RGB pixel juxtaposition method uses three OLEDs of red, green and blue side by side on a substrate to form three primary color pixels.
  • the electron transport material (ETL) above the light-emitting layer is vapor-deposited by a common mask.
  • the three light-emitting layers share an electron transport layer structure.
  • the energy levels and electrical properties of the three materials of the pixel and the blue sub-pixel are different.
  • the choice of the electron transport layer must be compromised. It is not guaranteed that the three color devices will reach the best structure, which will lead to the performance of a certain color device. The reduction.
  • the existing OLED display panel has a technical problem that the electron transfer performance of the electron transport layer and the electron injection layer in some light-emitting color regions is not good, and needs to be improved.
  • the present application provides an OLED display panel and a display device, which are used to solve the technical problem of poor electron transfer performance of the electron transport layer and the electron injection layer in some light-emitting color regions of the existing OLED display panel.
  • An embodiment of the application provides an OLED display panel, and the light-emitting function layer of the OLED display panel includes:
  • the pixel definition layer defines the first light-emitting color area, the second light-emitting color area, and the third light-emitting color area;
  • a luminescent material layer arranged between the pixel electrode and the common electrode;
  • the electron injection layer and the electron transport layer are arranged between the luminescent material layer and the common electrode;
  • the electron transfer performance of the electron injection layer or the electron transport layer is different.
  • the materials of the electron injection layer are different in at least two of the first light-emitting color area, the second light-emitting color area, and the third light-emitting color area.
  • the thickness of the electron injection layer is different in at least two areas of the first light-emitting color area, the second light-emitting color area, and the third light-emitting color area.
  • the material and thickness of the electron injection layer are different in at least two of the first light-emitting color area, the second light-emitting color area, and the third light-emitting color area.
  • the different materials of the electron injection layer are lithium fluoride and cesium fluoride, respectively.
  • the materials of the electron transport layer are different in at least two of the first light-emitting color area, the second light-emitting color area, and the third light-emitting color area.
  • the thickness of the electron transport layer is different in at least two of the first light-emitting color area, the second light-emitting color area, and the third light-emitting color area.
  • the material and thickness of the electron transport layer are different in at least two of the first light-emitting color area, the second light-emitting color area, and the third light-emitting color area.
  • the different materials of the electron transport layer are quinoline derivatives and silicon-containing heterocyclic compounds, respectively.
  • the first light-emitting color area is a red light-emitting color area
  • the second light-emitting color area is a green light-emitting color area
  • the third light-emitting color area is a blue light-emitting color area
  • the thickness of the first light-emitting color area and the second light-emitting color area are the same, and the thickness of the third light-emitting color area is different from the first light-emitting color area and the second light-emitting color area.
  • An embodiment of the present application provides a display device, which includes an OLED display panel, and the light-emitting function layer of the OLED display panel includes:
  • the pixel definition layer defines the first light-emitting color area, the second light-emitting color area, and the third light-emitting color area;
  • a luminescent material layer arranged between the pixel electrode and the common electrode;
  • the electron injection layer and the electron transport layer are arranged between the luminescent material layer and the common electrode;
  • the electron transfer performance of the electron injection layer or the electron transport layer is different.
  • the materials of the electron injection layer are different in at least two of the first light-emitting color area, the second light-emitting color area, and the third light-emitting color area.
  • the thickness of the electron injection layer is different in at least two of the first light-emitting color area, the second light-emitting color area, and the third light-emitting color area.
  • the material and thickness of the electron injection layer are different in at least two areas of the first light-emitting color area, the second light-emitting color area, and the third light-emitting color area.
  • the different materials of the electron injection layer are lithium fluoride and cesium fluoride, respectively.
  • the materials of the electron transport layer are different in at least two of the first light-emitting color area, the second light-emitting color area, and the third light-emitting color area.
  • the thickness of the electron transport layer is different in at least two areas of the first light-emitting color area, the second light-emitting color area, and the third light-emitting color area.
  • the material and thickness of the electron transport layer are different in at least two of the first light-emitting color area, the second light-emitting color area, and the third light-emitting color area.
  • the different materials of the electron transport layer are quinoline derivatives and silicon-containing heterocyclic compounds, respectively.
  • the first light-emitting color area is a red light-emitting color area
  • the second light-emitting color area is a green light-emitting color area
  • the third light-emitting color area is a blue light-emitting color area
  • the present application provides an OLED display panel and a display device.
  • the light-emitting function layer of the OLED display panel includes a pixel definition layer, a pixel electrode, a common electrode, a light-emitting material layer, an electron injection layer, and an electron transport layer.
  • the pixel definition layer defines the first A light-emitting color area, a second light-emitting color area, and a third light-emitting color area
  • the light-emitting material layer is disposed between the pixel electrode and the common electrode
  • the electron injection layer and the electron transport layer are disposed on the light-emitting Between the material layer and the common electrode, wherein, in at least two of the first light-emitting color area, the second light-emitting color area, and the third light-emitting color area, the electron injection layer or the electron transport
  • the electron transfer properties of the layers are different; when the light-emitting function layer is working, the electron transfer properties of the first light-emitting color area, the second light-emitting color area, the third light-emitting color area, the electron injection layer and the electron transport layer are different, which makes the electron transfer in different areas
  • the performance and light-emitting performance are optimized, which solves the technical problem of poor electron transfer performance of the electron transport layer and the electron injection layer in some
  • FIG. 1 is a first schematic cross-sectional view of an OLED display panel provided by an embodiment of the application.
  • FIG. 2 is a second schematic cross-sectional view of an OLED display panel provided by an embodiment of the application.
  • FIG. 3 is a schematic flowchart of an inkjet printing method provided by an embodiment of the application.
  • the present application provides an OLED display panel and a display device.
  • OLED display panel and a display device.
  • the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the application, and are not used to limit the application.
  • the present application provides an OLED display panel and a display device, which are used to solve the technical problem of poor electron transfer performance of the electron transport layer and the electron injection layer in some light-emitting color regions of the existing OLED display panel.
  • the light-emitting functional layer of the OLED display panel includes a pixel definition layer 101, a pixel electrode 102, a common electrode 103, a light-emitting material layer 104, an electron injection layer 105, and an electron transport layer 106.
  • the pixel definition The layer 101 defines a first light-emitting color area 201, a second light-emitting color area 202, and a third light-emitting color area 203.
  • the light-emitting material layer 104 is disposed between the pixel electrode 102 and the common electrode 103, and the electron injection The layer 105 and the electron transport layer 106 are disposed between the luminescent material layer 104 and the common electrode 103, wherein, in the first luminous color area 201, the second luminous color area 202, and the third luminous color area 203 In at least two regions of, the electron transfer properties of the electron injection layer 105 or the electron transport layer 106 are different.
  • the light-emitting functional layer of the OLED display panel includes a pixel definition layer, a pixel electrode, a common electrode, a light-emitting material layer, an electron injection layer, and an electron transport layer.
  • the pixel definition layer defines a first light-emitting color area, a second light-emitting color area, and a second light-emitting color area.
  • a light-emitting color area and a third light-emitting color area the light-emitting material layer is disposed between the pixel electrode and the common electrode, and the electron injection layer and the electron transport layer are disposed between the light-emitting material layer and the common electrode
  • the electron transfer performance of the electron injection layer or the electron transport layer is different;
  • the electron injection layer 105 is made of different materials, and the materials are different. Therefore, the electron transfer performance is different, and the electron transfer performance of different regions is respectively optimal, so that the luminescence performance of different regions is optimal.
  • the material of the electron injection layer 105 is different in the first light-emitting color area 201 and the second light-emitting color area 202.
  • the material of the electron injection layer 105 is different in the first light-emitting color area 201 and the third light-emitting color area 203.
  • the material of the electron injection layer 105 is different.
  • the electron injection layer 105 is made of different materials.
  • the thickness of the electron injection layer 105 is different in at least two areas of the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203.
  • the thickness of the electron injection layer 105 is different.
  • the thickness of the electron injection layer 105 is different.
  • the thickness of the electron injection layer 105 is different.
  • the thickness of the electron injection layer 105 is different.
  • the material and thickness of the electron injection layer 105 are different in at least two areas of the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203.
  • the material and thickness of the electron injection layer 105 are different.
  • the material and thickness of the electron injection layer 105 are different.
  • the material and thickness of the electron injection layer 105 are different.
  • the material and thickness of the electron injection layer 105 are different.
  • the different materials of the electron injection layer 105 are lithium fluoride and cesium fluoride.
  • the material of the electron transport layer 105 is different.
  • the material of the electron transport layer 105 is different in the first light-emitting color area 201 and the second light-emitting color area 202.
  • the material of the electron transport layer 105 is different in the first light-emitting color area 201 and the third light-emitting color area 203.
  • the material of the electron transport layer 105 is different.
  • the material of the electron transport layer 105 is different in the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203.
  • the thickness of the electron transport layer 105 is different in at least two areas of the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203.
  • the thickness of the electron transport layer 105 is different.
  • the thickness of the electron transport layer 105 is different in the first light-emitting color area 201 and the third light-emitting color area 203.
  • the thickness of the electron transport layer 105 is different.
  • the thickness of the electron transport layer 105 is different.
  • the material and thickness of the electron transport layer 105 are different in at least two areas of the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203.
  • the material and thickness of the electron transport layer 105 are different.
  • the material and thickness of the electron transport layer 105 are different.
  • the material and thickness of the electron transport layer 105 are different.
  • the material and thickness of the electron transport layer 105 are different.
  • the different materials of the electron transport layer 105 are quinoline derivatives and silicon-containing heterocyclic compounds.
  • the first light-emitting color area 201 is a red light-emitting color area
  • the second light-emitting color area 202 is a green light-emitting color area
  • the third light-emitting color area 203 is a blue light-emitting color area.
  • the thickness of the first light-emitting color area 201 and the second light-emitting color area 202 are the same, and the thickness of the third light-emitting color area 203 is different from the first light-emitting color area 201 and the second light-emitting color area 202 .
  • the first light-emitting color area 201 is a red light-emitting color area
  • the second light-emitting color area 202 is a green light-emitting color area
  • the third light-emitting color area 203 is In the blue light-emitting color area
  • the material of the first light-emitting color area 201 and the second light-emitting color area 202 is the same
  • the material of the third light-emitting color area 203 is the same as that of the first light-emitting color area 201 and the second light-emitting color area 201.
  • the two light-emitting color regions 202 are different.
  • the first light-emitting color area 201 is a red light-emitting color area
  • the second light-emitting color area 202 is a green light-emitting color area
  • the third light-emitting color area 203 is a blue light-emitting color area.
  • the material and thickness of the first light-emitting color area 201 and the second light-emitting color area 202 are the same, and the material and thickness of the third light-emitting color area 203 are the same as those of the first light-emitting color area 201 and the second light-emitting color area.
  • the color area 202 is different.
  • the electron transport layer 105 of the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203 can be prepared by inkjet printing.
  • the hole transport layers of the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203 can be prepared by inkjet printing, and are prepared from inks of the same concentration. And the ink characteristics are the same, and the volume printed in each light-emitting color area is different.
  • the light-emitting material layer 104 of the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203 may be prepared by evaporation.
  • the light-emitting material layer 104 of the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203 may be prepared by inkjet printing.
  • the hole transport layers of the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203 may be prepared by evaporation.
  • the hole transport layers of the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203 may be prepared by inkjet printing.
  • the hole transport layers of the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203 can be prepared by inkjet printing, and are prepared from inks of the same concentration. And the ink characteristics are the same, and the volume printed in each light-emitting color area is the same.
  • the printed electron transport layer 105 has a solvent orthogonal to the luminescent material layer 104 to ensure that the luminescent material layer 104 is not dissolved by the upper solvent.
  • Inkjet printing is a film forming method in which the functional material ink is jetted to the corresponding position drop by drop under the control of the computer to form a pattern. It has the advantages of simple operation, non-contact, maskless, low equipment cost, and high material utilization. , Is considered to be an effective way to realize flexible large-area OLED/QLED displays. Inkjet printing to prepare display screens has received extensive attention and development, but the uniformity of the printed film is still a key issue.
  • the inkjet print head needs to move back and forth along the printing direction for several times to fill the pixels on the entire substrate with ink, so that the time for the successively printed inks to dry There is a big difference between the atmosphere and the dry atmosphere, resulting in uneven ink drying on the substrate.
  • the printed ink often accompanies the coffee ring phenomenon during the drying process, forming an uneven film with thick sides and a thin middle.
  • the uneven printing film and coffee ring phenomenon during the printing process and the drying process will seriously reduce the performance of the display.
  • the existing printing process mainly improves the uniformity of the printed film by optimizing the ink solvent composition, bank properties and shape, drying equipment and conditions, etc., but cannot achieve uniform film formation and slow down the coffee ring effect at the same time.
  • the inkjet printing method provided by the present application can be used to form the electron transport layer 105, the luminescent material layer 104, and the hole transport layer, which can reduce the film formation failure in different areas during the printing process due to the different drying rates before and after printing.
  • the uniformity problem can also reduce the coffee ring phenomenon that occurs when the ink is drying after the printing is completed, and print and dry the luminous color area.
  • An inkjet printing method includes the following steps:
  • s2 Perform inkjet printing of functional ink on the luminous color area on the substrate after cooling to form an ink liquid film;
  • the substrate is placed at a temperature of T2, and the ink liquid film is vacuum dried, and the ink liquid film becomes a solid film;
  • the melting point of the ink is ⁇ T1 ⁇ T2 ⁇ room temperature.
  • the functional ink is inkjet printed on the luminous color area on the substrate after the temperature is lowered.
  • the solvent of the functional ink is a blend solvent or a single solvent, and the boiling point of the single solvent is higher than 200°C.
  • the functional ink is an OLED ink
  • the solvent of the OLED ink is a blending solvent
  • the blending solvent includes a high-boiling point solvent and a low-boiling point solvent
  • the high-boiling point solvent is selected from 3, One of 4-dimethyl anisole, 1,3-dimethyl anisole, 1,2,4-trimethoxybenzene, n-dodecane, isophorone and phenylcyclohexane or
  • the low boiling point solvent is selected from one or more of toluene, p-xylene, chlorobenzene, anisole, nitrobenzene, mesitylene and butyl acetate.
  • the functional ink is a QLED ink
  • the solvent of the QLED ink is a blending solvent
  • the blending solvent includes a non-polar organic solvent with a high boiling point and a polar solvent with a low boiling point, so
  • the high-boiling non-polar organic solvent is selected from one or more of halogenated aromatic hydrocarbons and their derivatives;
  • the low-boiling polar solvent is selected from one or more of alcohols, esters and ethers.
  • the high-boiling non-polar organic solvent is selected from one or more of o-dichlorobenzene, meta-dichlorobenzene and o-bromotoluene;
  • the low-boiling polar solvent is selected from methanol One or more of, isopropanol, 2-methoxyethanol, ethyl acetate, butyl acetate, ethylene glycol monobutyl ether and dipropylene glycol monomethyl ether.
  • the OLED display device includes an OLED display panel.
  • the light-emitting function layer of the OLED display panel includes a pixel definition layer 101, a pixel electrode 102, a common electrode 103, a light-emitting material layer 104, an electron injection layer 105, and an electron transport layer 105,
  • the pixel defining layer 101 defines a first light-emitting color area 201, a second light-emitting color area 202, and a third light-emitting color area 203
  • the light-emitting material layer 104 is disposed between the pixel electrode 102 and the common electrode 103
  • the electron injection layer 105 and the electron transport layer 105 are disposed between the light-emitting material layer 104 and the common electrode 103, wherein, in the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area In at least two of the color regions 203, the electron transfer performance of the electron injection layer 105 or the
  • the OLED display device includes an OLED display panel.
  • the light-emitting function layer of the OLED display panel includes a pixel definition layer, a pixel electrode, a common electrode, a light-emitting material layer, an electron injection layer, and an electron transport layer.
  • the layer defines a first light-emitting color area, a second light-emitting color area, and a third light-emitting color area
  • the light-emitting material layer is disposed between the pixel electrode and the common electrode
  • the electron injection layer and the electron transport layer are disposed between Between the luminescent material layer and the common electrode, wherein, in at least two regions of the first luminescent color region, the second luminescent color region, and the third luminescent color region, the electron injection layer or the The electron transfer properties of the electron transport layer are different; when the light-emitting function layer is working, the electron injection layer and the electron transport layer of the first light-emitting color area, the second light-emitting color area, and the third light-emitting color area have different electron transfer properties, so that different areas
  • the electron transfer performance and light-emitting performance of the OLED display panel are optimized, which solves the technical problem of poor electron transfer performance of the electron transport layer and the electron injection layer in the partial light-emitting color area of the
  • the display device is in at least two of the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203, and the material of the electron injection layer 105
  • the electron transfer performance is different due to different materials, and the electron transfer performance of different regions is respectively optimized, so that the luminescence performance of different regions is the best.
  • the material of the electron injection layer 105 is different in the first light-emitting color area 201 and the second light-emitting color area 202 of the display device.
  • the material of the electron injection layer 105 is different in the first light-emitting color area 201 and the third light-emitting color area 203 of the display device.
  • the material of the electron injection layer 105 is different in the second light-emitting color area 202 and the third light-emitting color area 203 of the display device.
  • the material of the electron injection layer 105 is different in the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203 of the display device.
  • the display device is in at least two of the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203, and the thickness of the electron injection layer 105 is different.
  • the thickness of the electron injection layer 105 is different in the first light-emitting color area 201 and the second light-emitting color area 202 of the display device.
  • the thickness of the electron injection layer 105 is different in the first light-emitting color area 201 and the third light-emitting color area 203 of the display device.
  • the thickness of the electron injection layer 105 is different in the second light-emitting color region 202 and the third light-emitting color region 203.
  • the thickness of the electron injection layer 105 is different in the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203 of the display device.
  • the display device is in at least two of the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203, and the material of the electron injection layer 105 It is different from thickness.
  • the material and thickness of the electron injection layer 105 are different in the first light-emitting color area 201 and the second light-emitting color area 202 of the display device.
  • the material and thickness of the electron injection layer 105 are different in the first light-emitting color area 201 and the third light-emitting color area 203 of the display device.
  • the material and thickness of the electron injection layer 105 are different in the second light-emitting color area 202 and the third light-emitting color area 203 of the display device.
  • the material and thickness of the electron injection layer 105 are different in the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203 of the display device.
  • the different materials of the electron injection layer 105 of the display device are lithium fluoride and cesium fluoride, respectively.
  • the display device is in at least two of the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203, and the material of the electron transport layer 105 is different.
  • the material of the electron transport layer 105 is different in the first light-emitting color area 201 and the second light-emitting color area 202 of the display device.
  • the materials of the electron transport layer 105 are different in the first light-emitting color area 201 and the third light-emitting color area 203.
  • the material of the electron transport layer 105 is different in the second light-emitting color region 202 and the third light-emitting color region 203.
  • the material of the electron transport layer 105 is different in the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203 of the display device.
  • the display device is in at least two areas of the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203, and the thickness of the electron transport layer 105 is different.
  • the thickness of the electron transport layer 105 is different in the first light-emitting color area 201 and the second light-emitting color area 202 of the display device.
  • the thickness of the electron transport layer 105 is different in the first light-emitting color area 201 and the third light-emitting color area 203 of the display device.
  • the thickness of the electron transport layer 105 is different in the second light-emitting color area 202 and the third light-emitting color area 203.
  • the thickness of the electron transport layer 105 is different in the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203.
  • the display device is in at least two of the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203, and the material of the electron transport layer 105 is It is different from thickness.
  • the material and thickness of the electron transport layer 105 are different in the first light-emitting color area 201 and the second light-emitting color area 202 of the display device.
  • the material and thickness of the electron transport layer 105 are different in the first light-emitting color area 201 and the third light-emitting color area 203 of the display device.
  • the material and thickness of the electron transport layer 105 are different in the second light-emitting color region 202 and the third light-emitting color region 203.
  • the material and thickness of the electron transport layer 105 are different in the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203 of the display device.
  • the different materials of the electron transport layer 105 are quinoline derivatives and silicon-containing heterocyclic compounds, respectively.
  • the first light-emitting color area 201 is a red light-emitting color area
  • the second light-emitting color area 202 is a green light-emitting color area
  • the third light-emitting color area 203 Is a blue light-emitting color area
  • the thickness of the first light-emitting color area 201 and the second light-emitting color area 202 are the same
  • the thickness of the third light-emitting color area 203 is the same as that of the first light-emitting color area 201 and the The second light emitting color area 202 is different.
  • the first light-emitting color area 201 is a red light-emitting color area
  • the second light-emitting color area 202 is a green light-emitting color area
  • the third light-emitting color area 203 Is a blue light-emitting color area
  • the material of the first light-emitting color area 201 and the second light-emitting color area 202 are the same
  • the material of the third light-emitting color area 203 is the same as that of the first light-emitting color area 201 and the The second light emitting color area 202 is different.
  • the first light-emitting color area 201 is a red light-emitting color area
  • the second light-emitting color area 202 is a green light-emitting color area
  • the third light-emitting color area 203 It is a blue light-emitting color area
  • the material and thickness of the first light-emitting color area 201 and the second light-emitting color area 202 are the same
  • the material and thickness of the third light-emitting color area 203 are the same as those of the first light-emitting color area.
  • 201 is different from the second light emitting color area 202.
  • the electron transport layer 105 of the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203 may be prepared by inkjet printing.
  • the hole transport layers of the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203 can be prepared by inkjet printing, Prepared from the same concentration of ink, and the ink characteristics are the same, and the volume printed in each light-emitting color area is different.
  • the light-emitting material layer 104 of the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203 may be prepared by evaporation.
  • the light-emitting material layer 104 of the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203 may be prepared by inkjet printing.
  • the hole transport layers of the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203 may be prepared by evaporation.
  • the hole transport layers of the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203 may be prepared by inkjet printing.
  • the hole transport layers of the first light-emitting color area 201, the second light-emitting color area 202, and the third light-emitting color area 203 can be prepared by inkjet printing, Prepared from the same density of ink, and the ink characteristics are the same, and the volume printed in each light-emitting color area is the same.
  • the printed electron transport layer 105 has a solvent orthogonal to the luminescent material layer 104 to ensure that the luminescent material layer 104 is not dissolved by the upper solvent.
  • the present application provides an OLED display panel and a display device.
  • the light-emitting function layer of the OLED display panel includes a pixel definition layer, a pixel electrode, a common electrode, a light-emitting material layer, an electron injection layer, and an electron transport layer.
  • the pixel definition layer defines the first A light-emitting color area, a second light-emitting color area, and a third light-emitting color area
  • the light-emitting material layer is disposed between the pixel electrode and the common electrode
  • the electron injection layer and the electron transport layer are disposed on the light-emitting Between the material layer and the common electrode, wherein, in at least two of the first light-emitting color area, the second light-emitting color area, and the third light-emitting color area, the electron injection layer or the electron transport
  • the electron transfer properties of the layers are different; when the light-emitting function layer is working, the electron transfer properties of the first light-emitting color area, the second light-emitting color area, the third light-emitting color area, the electron injection layer and the electron transport layer are different, which makes the electron transfer in different areas
  • the performance and light-emitting performance are optimized, which solves the technical problem of poor electron transfer performance of the electron transport layer and the electron injection layer in some

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Abstract

本申请提供一种OLED显示面板以及显示装置,该OLED显示面板在第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,电子注入层或电子传输层的电子转移性能不同,解决了现有OLED显示面板存在部分发光颜色区域的电子传输层和电子注入层的电子转移性能不佳的技术问题。

Description

OLED显示面板以及显示装置 技术领域
本申请涉及显示技术领域,尤其涉及一种OLED显示面板以及显示装置。
背景技术
常用的OLED全彩化显示技术包括RGB像素并置法,RGB像素并置法是将红绿蓝三个OLED并置(side by side)于基板上成为三原色像素。
在RGB像素并置法中,发光层之上的电子传输材料(ETL)是通过供公共掩膜板共同蒸镀,三种发光层共同采用一种电子传输层结构,由于红色子像素、绿色子像素、蓝色子像素三种材料的能级以及电性的不同,在电子传输层选择上要进行折中处理,不能保证三种颜色器件都达到最佳结构,这会导致某种颜色器件性能的降低。
所以,现有OLED显示面板存在部分发光颜色区域的电子传输层和电子注入层的电子转移性能不佳的技术问题,需要改进。
技术问题
本申请提供一种OLED显示面板以及显示装置,用于解决现有OLED显示面板存在部分发光颜色区域的电子传输层和电子注入层的电子转移性能不佳的技术问题。
技术解决方案
为解决上述问题,本申请提供的技术方案如下:
本申请实施例提供一种OLED显示面板,所述OLED显示面板的发光功能层包括:
像素定义层,定义第一发光颜色区域、第二发光颜色区域、第三发光颜色区域;
像素电极;
公共电极;
发光材料层,设置于所述像素电极和所述公共电极之间;
电子注入层和电子传输层,设置于所述发光材料层和所述公共电极之间;
其中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子注入层或所述电子传输层的电子转移性能不同。
在本申请提供的OLED显示面板中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子注入层的材料不同。
在本申请提供的OLED显示面板中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子注入层的厚度不同。
在本申请提供的OLED显示面板中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子注入层的材料和厚度不同。
在本申请提供的OLED显示面板中,所述电子注入层的不同材料分别为氟化锂和氟化铯。
在本申请提供的OLED显示面板中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子传输层的材料不同。
在本申请提供的OLED显示面板中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子传输层的厚度不同。
在本申请提供的OLED显示面板中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子传输层的材料和厚度不同。
在本申请提供的OLED显示面板中,所述电子传输层的不同材料分别为喹啉衍生物和含硅的杂环化合物。
在本申请提供的OLED显示面板中,所述第一发光颜色区域为红色发光颜色区域、所述第二发光颜色区域为绿色发光颜色区域、所述第三发光颜色区域为蓝色发光颜色区域,所述第一发光颜色区域和所述第二发光颜色区域的厚度相同,所述第三发光颜色区域的厚度与所述第一发光颜色区域和所述第二发光颜色区域不同。
本申请实施例提供一种显示装置,其包括OLED显示面板,所述OLED显示面板的发光功能层包括:
像素定义层,定义第一发光颜色区域、第二发光颜色区域、第三发光颜色区域;
像素电极;
公共电极;
发光材料层,设置于所述像素电极和所述公共电极之间;
电子注入层和电子传输层,设置于所述发光材料层和所述公共电极之间;
其中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子注入层或所述电子传输层的电子转移性能不同。
在本申请提供的显示装置中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子注入层的材料不同。
在本申请提供的显示装置中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子注入层的厚度不同。
在本申请提供的显示装置中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子注入层的材料和厚度不同。
在本申请提供的显示装置中,所述电子注入层的不同材料分别为氟化锂和氟化铯。
在本申请提供的显示装置中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子传输层的材料不同。
在本申请提供的显示装置中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子传输层的厚度不同。
在本申请提供的显示装置中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子传输层的材料和厚度不同。
在本申请提供的显示装置中,所述电子传输层的不同材料分别为喹啉衍生物和含硅的杂环化合物。
在本申请提供的显示装置中,所述第一发光颜色区域为红色发光颜色区域、所述第二发光颜色区域为绿色发光颜色区域、所述第三发光颜色区域为蓝色发光颜色区域,所述第一发光颜色区域和所述第二发光颜色区域的厚度相同,所述第三发光颜色区域的厚度与所述第一发光颜色区域和所述第二发光颜色区域不同。
有益效果
本申请提供一种OLED显示面板以及显示装置,该OLED显示面板的发光功能层包括像素定义层、像素电极、公共电极、发光材料层、电子注入层和电子传输层,所述像素定义层定义第一发光颜色区域、第二发光颜色区域、第三发光颜色区域,所述发光材料层设置于所述像素电极和所述公共电极之间,所述电子注入层和电子传输层设置于所述发光材料层和所述公共电极之间,其中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子注入层或所述电子传输层的电子转移性能不同;在发光功能层工作时,第一发光颜色区域、第二发光颜色区域、第三发光颜色区域电子注入层和电子传输层的电子转移性能不同,使得不同区域的电子转移性能和发光性能达到最佳,解决了现有OLED显示面板存在部分发光颜色区域的电子传输层和电子注入层的电子转移性能不佳的技术问题。
附图说明
图1为本申请实施例提供的OLED显示面板的第一种截面示意图。
图2为本申请实施例提供的OLED显示面板的第二种截面示意图。
图3为本申请实施例提供的喷墨打印方法的流程示意图。
本发明的实施方式
本申请提供一种OLED显示面板以及显示装置,为使本申请的目的、技术方案及效果更加清楚、明确,以下参照附图并举实施例对本申请进一步详细说明。应当理解,此处所描述的具体实施例仅用以解释本申请,并不用于限定本申请。
本申请提供一种OLED显示面板以及显示装置,用于解决现有OLED显示面板存在部分发光颜色区域的电子传输层和电子注入层的电子转移性能不佳的技术问题。
如图1所示,本申请提供的OLED显示面板的发光功能层包括像素定义层101、像素电极102、公共电极103、发光材料层104、电子注入层105和电子传输层106,所述像素定义层101定义第一发光颜色区域201、第二发光颜色区域202、第三发光颜色区域203,所述发光材料层104设置于所述像素电极102和所述公共电极103之间,所述电子注入层105和电子传输层106设置于所述发光材料层104和所述公共电极103之间,其中,在所述第一发光颜色区域201、第二发光颜色区域202、第三发光颜色区域203中的至少两个区域内,所述电子注入层105或所述电子传输层106的电子转移性能不同。
在本实施例中,OLED显示面板的发光功能层包括像素定义层、像素电极、公共电极、发光材料层、电子注入层和电子传输层,所述像素定义层定义第一发光颜色区域、第二发光颜色区域、第三发光颜色区域,所述发光材料层设置于所述像素电极和所述公共电极之间,所述电子注入层和电子传输层设置于所述发光材料层和所述公共电极之间,其中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子注入层或所述电子传输层的电子转移性能不同;在发光功能层工作时,第一发光颜色区域、第二发光颜色区域、第三发光颜色区域电子注入层和电子传输层的电子转移性能不同,使得不同区域的电子转移性能和发光性能达到最佳,解决了现有OLED显示面板存在部分发光颜色区域的电子传输层和电子注入层的电子转移性能不佳的技术问题。
在一种实施例中,在所述第一发光颜色区域201、第二发光颜色区域202、第三发光颜色区域203中的至少两个区域内,所述电子注入层105的材料不同,材料不同所以电子转移性能不同,不同区域的电子转移性能分别达到最佳,使不同区域的发光性能达到最佳。
在一种实施例中,在所述第一发光颜色区域201和所述第二发光颜色区域202,所述电子注入层105的材料不同。
在一种实施例中,在所述第一发光颜色区域201和所述第三发光颜色区域203,所述电子注入层105的材料不同。
在一种实施例中,在所述第二发光颜色区域202和所述第三发光颜色区域203,所述电子注入层105的材料不同。
在一种实施例中,在所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203,所述电子注入层105的材料不同。
在一种实施例中,在所述第一发光颜色区域201、第二发光颜色区域202、第三发光颜色区域203中的至少两个区域内,所述电子注入层105的厚度不同。
在一种实施例中,在所述第一发光颜色区域201和所述第二发光颜色区域202,所述电子注入层105的厚度不同。
在一种实施例中,在所述第一发光颜色区域201和所述第三发光颜色区域203,所述电子注入层105的厚度不同。
在一种实施例中,在所述第二发光颜色区域202和所述第三发光颜色区域203,所述电子注入层105的厚度不同。
在一种实施例中,在所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203,所述电子注入层105的厚度不同。
在一种实施例中,在所述第一发光颜色区域201、第二发光颜色区域202、第三发光颜色区域203中的至少两个区域内,所述电子注入层105的材料和厚度不同。
在一种实施例中,在所述第一发光颜色区域201和所述第二发光颜色区域202,所述电子注入层105的材料和厚度不同。
在一种实施例中,在所述第一发光颜色区域201和所述第三发光颜色区域203,所述电子注入层105的材料和厚度不同。
在一种实施例中,在所述第二发光颜色区域202和所述第三发光颜色区域203,所述电子注入层105的材料和厚度不同。
在一种实施例中,在所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203,所述电子注入层105的材料和厚度不同。
在一种实施例中,所述电子注入层105的不同材料分别为氟化锂和氟化铯。
在一种实施例中,在所述第一发光颜色区域201、第二发光颜色区域202、第三发光颜色区域203中的至少两个区域内,所述电子传输层105的材料不同。
在一种实施例中,在所述第一发光颜色区域201和所述第二发光颜色区域202,所述电子传输层105的材料不同。
在一种实施例中,在所述第一发光颜色区域201和所述第三发光颜色区域203,所述电子传输层105的材料不同。
在一种实施例中,在所述第二发光颜色区域202和所述第三发光颜色区域203,所述电子传输层105的材料不同。
在一种实施例中,在所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203,所述电子传输层105的材料不同。
在一种实施例中,在所述第一发光颜色区域201、第二发光颜色区域202、第三发光颜色区域203中的至少两个区域内,所述电子传输层105的厚度不同。
在一种实施例中,在所述第一发光颜色区域201和所述第二发光颜色区域202,所述电子传输层105的厚度不同。
在一种实施例中,在所述第一发光颜色区域201和所述第三发光颜色区域203,所述电子传输层105的厚度不同。
在一种实施例中,在所述第二发光颜色区域202和所述第三发光颜色区域203,所述电子传输层105的厚度不同。
在一种实施例中,在所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203,所述电子传输层105的厚度不同。
在一种实施例中,在所述第一发光颜色区域201、第二发光颜色区域202、第三发光颜色区域203中的至少两个区域内,所述电子传输层105的材料和厚度不同。
在一种实施例中,在所述第一发光颜色区域201和所述第二发光颜色区域202,所述电子传输层105的材料和厚度不同。
在一种实施例中,在所述第一发光颜色区域201和所述第三发光颜色区域203,所述电子传输层105的材料和厚度不同。
在一种实施例中,在所述第二发光颜色区域202和所述第三发光颜色区域203,所述电子传输层105的材料和厚度不同。
在一种实施例中,在所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203,所述电子传输层105的材料和厚度不同。
在一种实施例中,所述电子传输层105的不同材料分别为喹啉衍生物和含硅的杂环化合物。
在一种实施例中,所述第一发光颜色区域201为红色发光颜色区域、所述第二发光颜色区域202为绿色发光颜色区域、所述第三发光颜色区域203为蓝色发光颜色区域,所述第一发光颜色区域201和所述第二发光颜色区域202的厚度相同,所述第三发光颜色区域203的厚度与所述第一发光颜色区域201和所述第二发光颜色区域202不同。
在一种实施例中,如图2所示,所述第一发光颜色区域201为红色发光颜色区域、所述第二发光颜色区域202为绿色发光颜色区域、所述第三发光颜色区域203为蓝色发光颜色区域,所述第一发光颜色区域201和所述第二发光颜色区域202的材料相同,所述第三发光颜色区域203的材料与所述第一发光颜色区域201和所述第二发光颜色区域202不同。
在一种实施例中,所述第一发光颜色区域201为红色发光颜色区域、所述第二发光颜色区域202为绿色发光颜色区域、所述第三发光颜色区域203为蓝色发光颜色区域,所述第一发光颜色区域201和所述第二发光颜色区域202的材料和厚度相同,所述第三发光颜色区域203的材料和厚度与所述第一发光颜色区域201和所述第二发光颜色区域202不同。
在一种实施例中,所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203的电子传输层105可以通过喷墨打印制备。
在一种实施例中,所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203的空穴传输层可以通过喷墨打印制备,由同一浓度的墨水制备,且墨水特性相同,在各发光颜色区域内打印的体积不同。
在一种实施例中,所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203的发光材料层104可以通过蒸镀制备。
在一种实施例中,所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203的发光材料层104可以通过喷墨打印制备。
在一种实施例中,所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203的空穴传输层可以通过蒸镀制备。
在一种实施例中,所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203的空穴传输层可以通过喷墨打印制备。
在一种实施例中,所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203的空穴传输层可以通过喷墨打印制备,由同一浓度的墨水制备,且墨水特性相同,在各发光颜色区域内打印的体积相同。
在一种实施例中,打印的电子传输层105具有与发光材料层104正交的溶剂,确保发光材料层104不被上层溶剂溶解。
喷墨打印是在计算机控制下将功能材料的墨水按需逐滴喷射到对应位置上并形成图案的成膜方式,具有操作简单、非接触、无掩模、设备成本低、材料利用率高等优点,被认为是实现柔性大面积OLED/QLED显示器的有效途径, 喷墨打印制备显示屏得到了广泛的关注和发展,但印刷薄膜的均匀性仍是一个关键的问题。在喷墨打印过程中,特别是在打印大尺寸基板,喷墨打印头需要沿着打印方向多次往返移动喷墨才能将整个基板上的像素内铺满墨水,这样先后打印的墨水干燥的时间和干燥的氛围都存在较大的差异,造成基板上墨水干燥的不均匀。进一步的,打印完的墨水在干燥过程中常常会伴随咖啡环现象,形成两边厚、中间薄的不均匀薄膜,打印过程与干燥过程中的印刷薄膜不均匀和咖啡环现象会严重降低显示器的性能和显示效果,现有的印刷工艺主要是通过优化墨水溶剂组份、bank性质和形状、干燥设备和条件等来提高印刷薄膜的均匀性,但是无法同时实现成膜均匀和减缓咖啡环效应现象。
如图3所示,本申请提供的喷墨打印方法可用于形成电子传输层105、发光材料层104以及空穴传输层,可以减少打印过程中不同区域由于打印前后干燥速率不同导致的成膜不均匀问题,还能减缓打印完成后墨水在干燥时出现的咖啡环现象,对发光颜色区域进行打印和干燥,一种喷墨打印方法,包括以下步骤:
s1:将基板降温至T1;
s2:在降温后的所述基板上的发光颜色区域进行喷墨打印功能性墨水,形成墨水液膜;
s3:将形成有墨水液膜后基板置于T2温度下,对墨水液膜进行抽真空干燥,所述墨水液膜变为固体薄膜;
s4:对所述固体薄膜进行热处理,完成交联固化。
在一种实施例中,墨水熔点<T1<T2<室温。
在一种实施例中,在T1的恒温条件下,在降温后的所述基板上对发光颜色区域进行喷墨打印功能性墨水。
在一种实施例中,T1<15℃。
在一种实施例中,-10℃≤T1≤10℃。
在一种实施例中,所述功能性墨水的溶剂为共混溶剂或单一溶剂,所述单一溶剂的沸点高于200℃。
在一种实施例中,所述功能性墨水为OLED墨水,所述OLED墨水的溶剂为共混溶剂,所述共混溶剂包括高沸点溶剂和低沸点溶剂,所述高沸点溶剂选自3,4-二甲基苯甲醚、1,3-二甲基苯甲醚、1,2,4-三甲氧基苯、正十二烷、异佛尔酮和苯基环己烷的一种或几种,所述低沸点溶剂选自甲苯、对二甲苯、氯苯、苯甲醚、氮苯、均三甲苯和乙酸丁酯的一种或几种。
在一种实施例中,所述功能性墨水为QLED墨水,所述QLED墨水的溶剂为共混溶剂,所述共混溶剂包括高沸点的非极性有机溶剂和低沸点的极性溶剂,所述高沸点的非极性有机溶剂选自卤代芳香烃及其衍生物的一种或几种;低沸点的极性溶剂选自为醇、酯和醚的一种或几种。
在一种实施例中,所述高沸点的非极性有机溶剂选自邻二氯苯、间二氯苯和邻溴甲苯的一种或几种;所述低沸点的极性溶剂选自甲醇、异丙醇、2-甲氧基乙醇、醋酸乙酯、醋酸丁酯、乙二醇一丁基醚和二丙二醇一甲基醚的一种或几种。
本申请提供的OLED显示装置包括OLED显示面板,所述OLED显示面板的发光功能层包括像素定义层101、像素电极102、公共电极103、发光材料层104、电子注入层105和电子传输层105,所述像素定义层101定义第一发光颜色区域201、第二发光颜色区域202、第三发光颜色区域203,所述发光材料层104设置于所述像素电极102和所述公共电极103之间,所述电子注入层105和电子传输层105设置于所述发光材料层104和所述公共电极103之间,其中,在所述第一发光颜色区域201、第二发光颜色区域202、第三发光颜色区域203中的至少两个区域内,所述电子注入层105或所述电子传输层105的电子转移性能不同。
在本实施例中,OLED显示装置包括OLED显示面板,所述OLED显示面板的发光功能层包括像素定义层、像素电极、公共电极、发光材料层、电子注入层和电子传输层,所述像素定义层定义第一发光颜色区域、第二发光颜色区域、第三发光颜色区域,所述发光材料层设置于所述像素电极和所述公共电极之间,所述电子注入层和电子传输层设置于所述发光材料层和所述公共电极之间,其中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子注入层或所述电子传输层的电子转移性能不同;在发光功能层工作时,第一发光颜色区域、第二发光颜色区域、第三发光颜色区域电子注入层和电子传输层的电子转移性能不同,使得不同区域的电子转移性能和发光性能达到最佳,解决了现有OLED显示面板存在部分发光颜色区域的电子传输层和电子注入层的电子转移性能不佳的技术问题。
在一种实施例中,所述显示装置在所述第一发光颜色区域201、第二发光颜色区域202、第三发光颜色区域203中的至少两个区域内,所述电子注入层105的材料不同,材料不同所以电子转移性能不同,不同区域的电子转移性能分别达到最佳,使不同区域的发光性能达到最佳。
在一种实施例中,所述显示装置在所述第一发光颜色区域201和所述第二发光颜色区域202,所述电子注入层105的材料不同。
在一种实施例中,所述显示装置在所述第一发光颜色区域201和所述第三发光颜色区域203,所述电子注入层105的材料不同。
在一种实施例中,所述显示装置在所述第二发光颜色区域202和所述第三发光颜色区域203,所述电子注入层105的材料不同。
在一种实施例中,所述显示装置在所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203,所述电子注入层105的材料不同。
在一种实施例中,所述显示装置在所述第一发光颜色区域201、第二发光颜色区域202、第三发光颜色区域203中的至少两个区域内,所述电子注入层105的厚度不同。
在一种实施例中,所述显示装置在所述第一发光颜色区域201和所述第二发光颜色区域202,所述电子注入层105的厚度不同。
在一种实施例中,所述显示装置在所述第一发光颜色区域201和所述第三发光颜色区域203,所述电子注入层105的厚度不同。
在一种实施例中,所述显示装置在所述第二发光颜色区域202和所述第三发光颜色区域203,所述电子注入层105的厚度不同。
在一种实施例中,所述显示装置在所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203,所述电子注入层105的厚度不同。
在一种实施例中,所述显示装置在所述第一发光颜色区域201、第二发光颜色区域202、第三发光颜色区域203中的至少两个区域内,所述电子注入层105的材料和厚度不同。
在一种实施例中,所述显示装置在所述第一发光颜色区域201和所述第二发光颜色区域202,所述电子注入层105的材料和厚度不同。
在一种实施例中,所述显示装置在所述第一发光颜色区域201和所述第三发光颜色区域203,所述电子注入层105的材料和厚度不同。
在一种实施例中,所述显示装置在所述第二发光颜色区域202和所述第三发光颜色区域203,所述电子注入层105的材料和厚度不同。
在一种实施例中,所述显示装置在所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203,所述电子注入层105的材料和厚度不同。
在一种实施例中,所述显示装置所述电子注入层105的不同材料分别为氟化锂和氟化铯。
在一种实施例中,所述显示装置在所述第一发光颜色区域201、第二发光颜色区域202、第三发光颜色区域203中的至少两个区域内,所述电子传输层105的材料不同。
在一种实施例中,所述显示装置在所述第一发光颜色区域201和所述第二发光颜色区域202,所述电子传输层105的材料不同。
在一种实施例中,所述显示装置在所述第一发光颜色区域201和所述第三发光颜色区域203,所述电子传输层105的材料不同。
在一种实施例中,所述显示装置在所述第二发光颜色区域202和所述第三发光颜色区域203,所述电子传输层105的材料不同。
在一种实施例中,所述显示装置在所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203,所述电子传输层105的材料不同。
在一种实施例中,所述显示装置在所述第一发光颜色区域201、第二发光颜色区域202、第三发光颜色区域203中的至少两个区域内,所述电子传输层105的厚度不同。
在一种实施例中,所述显示装置在所述第一发光颜色区域201和所述第二发光颜色区域202,所述电子传输层105的厚度不同。
在一种实施例中,所述显示装置在所述第一发光颜色区域201和所述第三发光颜色区域203,所述电子传输层105的厚度不同。
在一种实施例中,所述显示装置在所述第二发光颜色区域202和所述第三发光颜色区域203,所述电子传输层105的厚度不同。
在一种实施例中,所述显示装置在所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203,所述电子传输层105的厚度不同。
在一种实施例中,所述显示装置在所述第一发光颜色区域201、第二发光颜色区域202、第三发光颜色区域203中的至少两个区域内,所述电子传输层105的材料和厚度不同。
在一种实施例中,所述显示装置在所述第一发光颜色区域201和所述第二发光颜色区域202,所述电子传输层105的材料和厚度不同。
在一种实施例中,所述显示装置在所述第一发光颜色区域201和所述第三发光颜色区域203,所述电子传输层105的材料和厚度不同。
在一种实施例中,所述显示装置在所述第二发光颜色区域202和所述第三发光颜色区域203,所述电子传输层105的材料和厚度不同。
在一种实施例中,所述显示装置在所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203,所述电子传输层105的材料和厚度不同。
在一种实施例中,在所述显示装置中,所述电子传输层105的不同材料分别为喹啉衍生物和含硅的杂环化合物。
在一种实施例中,在所述显示装置中,所述第一发光颜色区域201为红色发光颜色区域、所述第二发光颜色区域202为绿色发光颜色区域、所述第三发光颜色区域203为蓝色发光颜色区域,所述第一发光颜色区域201和所述第二发光颜色区域202的厚度相同,所述第三发光颜色区域203的厚度与所述第一发光颜色区域201和所述第二发光颜色区域202不同。
在一种实施例中,在所述显示装置中,所述第一发光颜色区域201为红色发光颜色区域、所述第二发光颜色区域202为绿色发光颜色区域、所述第三发光颜色区域203为蓝色发光颜色区域,所述第一发光颜色区域201和所述第二发光颜色区域202的材料相同,所述第三发光颜色区域203的材料与所述第一发光颜色区域201和所述第二发光颜色区域202不同。
在一种实施例中,在所述显示装置中,所述第一发光颜色区域201为红色发光颜色区域、所述第二发光颜色区域202为绿色发光颜色区域、所述第三发光颜色区域203为蓝色发光颜色区域,所述第一发光颜色区域201和所述第二发光颜色区域202的材料和厚度相同,所述第三发光颜色区域203的材料和厚度与所述第一发光颜色区域201和所述第二发光颜色区域202不同。
在一种实施例中,在所述显示装置中,所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203的电子传输层105可以通过喷墨打印制备。
在一种实施例中,在所述显示装置中,所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203的空穴传输层可以通过喷墨打印制备,由同一浓度的墨水制备,且墨水特性相同,在各发光颜色区域内打印的体积不同。
在一种实施例中,在所述显示装置中,所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203的发光材料层104可以通过蒸镀制备。
在一种实施例中,在所述显示装置中,所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203的发光材料层104可以通过喷墨打印制备。
在一种实施例中,在所述显示装置中,所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203的空穴传输层可以通过蒸镀制备。
在一种实施例中,在所述显示装置中,所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203的空穴传输层可以通过喷墨打印制备。
在一种实施例中,在所述显示装置中,所述第一发光颜色区域201、第二发光颜色区域202和所述第三发光颜色区域203的空穴传输层可以通过喷墨打印制备,由同一浓度的墨水制备,且墨水特性相同,在各发光颜色区域内打印的体积相同。
在一种实施例中,在所述显示装置中,打印的电子传输层105具有与发光材料层104正交的溶剂,确保发光材料层104不被上层溶剂溶解。
根据上述实施例可知:
本申请提供一种OLED显示面板以及显示装置,该OLED显示面板的发光功能层包括像素定义层、像素电极、公共电极、发光材料层、电子注入层和电子传输层,所述像素定义层定义第一发光颜色区域、第二发光颜色区域、第三发光颜色区域,所述发光材料层设置于所述像素电极和所述公共电极之间,所述电子注入层和电子传输层设置于所述发光材料层和所述公共电极之间,其中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子注入层或所述电子传输层的电子转移性能不同;在发光功能层工作时,第一发光颜色区域、第二发光颜色区域、第三发光颜色区域电子注入层和电子传输层的电子转移性能不同,使得不同区域的电子转移性能和发光性能达到最佳,解决了现有OLED显示面板存在部分发光颜色区域的电子传输层和电子注入层的电子转移性能不佳的技术问题。
在上述实施例中,对各个实施例的描述都各有侧重,某个实施例中没有详述的部分,可以参见其他实施例的相关描述。
以上对本申请实施例所提供的一种OLED显示面板以及显示装置进行了详细介绍,本文中应用了具体个例对本申请的原理及实施方式进行了阐述,以上实施例的说明只是用于帮助理解本申请的技术方案及其核心思想;本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本申请各实施例的技术方案的范围。
综上所述,虽然本申请已以优选实施例揭露如上,但上述优选实施例并非用以限制本申请,本领域的普通技术人员,在不脱离本申请的精神和范围内,均可作各种更动与润饰,因此本申请的保护范围以权利要求界定的范围为准。

Claims (20)

  1. 一种OLED显示面板,其发光功能层包括:
    像素定义层,定义第一发光颜色区域、第二发光颜色区域、第三发光颜色区域;
    像素电极;
    公共电极;
    发光材料层,设置于所述像素电极和所述公共电极之间;
    电子注入层和电子传输层,设置于所述发光材料层和所述公共电极之间;
    其中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子注入层或所述电子传输层的电子转移性能不同。
  2. 根据权利要求1所述的OLED显示面板,其中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子注入层的材料不同。
  3. 根据权利要求1所述的OLED显示面板,其中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子注入层的厚度不同。
  4. 根据权利要求1所述的OLED显示面板,其中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子注入层的材料和厚度不同。
  5. 根据权利要求2所述的OLED显示面板,其中,所述电子注入层的不同材料分别为氟化锂和氟化铯。
  6. 根据权利要求1所述的OLED显示面板,其中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子传输层的材料不同。
  7. 根据权利要求1所述的OLED显示面板,其中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子传输层的厚度不同。
  8. 根据权利要求1所述的OLED显示面板,其中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子传输层的材料和厚度不同。
  9. 根据权利要求6所述的OLED显示面板,其中,所述电子传输层的不同材料分别为喹啉衍生物和含硅的杂环化合物。
  10. 根据权利要求1所述的OLED显示面板,其中,所述第一发光颜色区域为红色发光颜色区域、所述第二发光颜色区域为绿色发光颜色区域、所述第三发光颜色区域为蓝色发光颜色区域,所述第一发光颜色区域和所述第二发光颜色区域的厚度相同,所述第三发光颜色区域的厚度与所述第一发光颜色区域和所述第二发光颜色区域不同。
  11. 一种显示装置,其包括OLED显示面板,所述OLED显示面板的发光功能层包括:
    像素定义层,定义第一发光颜色区域、第二发光颜色区域、第三发光颜色区域;
    像素电极;
    公共电极;
    发光材料层,设置于所述像素电极和所述公共电极之间;
    电子注入层和电子传输层,设置于所述发光材料层和所述公共电极之间;
    其中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子注入层或所述电子传输层的电子转移性能不同。
  12. 根据权利要求11所述的显示装置,其中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子注入层的材料不同。
  13. 根据权利要求11所述的显示装置,其中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子注入层的厚度不同。
  14. 根据权利要求11所述的显示装置,其中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子注入层的材料和厚度不同。
  15. 根据权利要求12所述的显示装置,其中,所述电子注入层的不同材料分别为氟化锂和氟化铯。
  16. 根据权利要求11所述的显示装置,其中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子传输层的材料不同。
  17. 根据权利要求11所述的显示装置,其中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子传输层的厚度不同。
  18. 根据权利要求11所述的显示装置,其中,在所述第一发光颜色区域、第二发光颜色区域、第三发光颜色区域中的至少两个区域内,所述电子传输层的材料和厚度不同。
  19. 根据权利要求16所述的显示装置,其中,所述电子传输层的不同材料分别为喹啉衍生物和含硅的杂环化合物。
  20. 根据权利要求11所述的显示装置,其中,所述第一发光颜色区域为红色发光颜色区域、所述第二发光颜色区域为绿色发光颜色区域、所述第三发光颜色区域为蓝色发光颜色区域,所述第一发光颜色区域和所述第二发光颜色区域的厚度相同,所述第三发光颜色区域的厚度与所述第一发光颜色区域和所述第二发光颜色区域不同。
PCT/CN2020/071881 2019-12-31 2020-01-14 Oled显示面板以及显示装置 Ceased WO2021134830A1 (zh)

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