WO2024000662A1 - 显示面板及显示装置 - Google Patents

显示面板及显示装置 Download PDF

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WO2024000662A1
WO2024000662A1 PCT/CN2022/105519 CN2022105519W WO2024000662A1 WO 2024000662 A1 WO2024000662 A1 WO 2024000662A1 CN 2022105519 W CN2022105519 W CN 2022105519W WO 2024000662 A1 WO2024000662 A1 WO 2024000662A1
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layer
light
emitting
sub
color
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PCT/CN2022/105519
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English (en)
French (fr)
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华正伸
李们在
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武汉华星光电半导体显示技术有限公司
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Publication of WO2024000662A1 publication Critical patent/WO2024000662A1/zh

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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
    • 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
    • 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
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/18—Carrier blocking layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • 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
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • 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

Definitions

  • the present application relates to the field of display, and in particular to a display panel and a display device.
  • OLED organic light-emitting diode
  • a stacked light-emitting device structure is usually used to improve the brightness and service life of the display panel.
  • the stacked light-emitting device structure is prone to the problem of excessive driving voltage, and also reduces the current efficiency of the device, resulting in a service life of the device. Promotion is limited.
  • Embodiments of the present application provide a display panel and a display device to solve the technical problem that the stacked light-emitting device structure easily causes excessive driving voltage of the display panel.
  • Embodiments of the present application provide a display panel, including an array substrate, a first electrode layer and a second electrode layer that are stacked in sequence, and at least one organic light-emitting element located between the first electrode layer and the second electrode layer.
  • the organic light-emitting functional part includes:
  • a first organic light-emitting unit is disposed on the first electrode layer and includes a first light-emitting layer
  • a first electron generation layer is provided on the first organic light-emitting unit
  • a first hole generation layer is provided on the first electron generation layer
  • a second organic light-emitting unit is disposed between the first hole generation layer and the second electrode layer, and includes a second light-emitting layer;
  • the organic light-emitting functional part further includes a first intermediate layer disposed between the first electron generation layer and the first hole generation layer.
  • the first intermediate layer is used to block holes and transport electrons.
  • the first light-emitting layer and the second light-emitting layer each include two light-emitting sub-layers that are stacked and used to emit light of different colors. In each of the light-emitting sub-layers, at least three of the light-emitting sub-layers are respectively used. To emit light of different colors.
  • the material of the first intermediate layer is selected from one of metal compounds, alkaline metals and electron transport inorganic compounds,
  • the material of the first intermediate layer includes lithium amide, lithium fluoride or an electron-withdrawing compound.
  • the thickness of the first intermediate layer is 0.1nm ⁇ 15nm.
  • the first light-emitting layer includes a first light-emitting sub-layer and a second light-emitting sub-layer disposed on a side of the first light-emitting sub-layer away from the first electrode layer
  • the second light-emitting layer includes a third light-emitting sub-layer and a fourth light-emitting sub-layer disposed on a side of the third light-emitting sub-layer away from the first electrode layer;
  • the first luminescent sub-layer is used to emit light of the first color
  • the second luminescent sub-layer and the third luminescent sub-layer are used to emit light of the second color
  • the fourth luminescent sub-layer is used to emit the third luminous sub-layer. Color light.
  • the organic light-emitting functional part further includes:
  • a third organic light-emitting unit is disposed between the second organic light-emitting unit and the second electrode layer;
  • a second hole generation layer is provided between the second electron generation layer and the third organic light-emitting unit;
  • a second intermediate layer is provided between the second electron generation layer and the second hole generation layer.
  • the second intermediate layer is used to block holes and transport electrons.
  • the material of the second intermediate layer is selected from one of metal compounds, alkaline metals and electron-transporting inorganic compounds.
  • the third organic light-emitting unit includes a third light-emitting layer, and the third light-emitting layer stacks the fifth light-emitting sublayer and the sixth light-emitting sublayer.
  • the first luminescent sub-layer and the fifth luminescent sub-layer are used to emit light of a first color
  • the second luminescent sub-layer and the third luminescent sub-layer are used to emit light of a first color
  • the layer is used to emit light of the second color
  • the sixth luminescent sub-layer and the fourth luminescent sub-layer are used to emit light of the third color.
  • the first color light is blue light
  • the second color light is green light
  • the third color light is red light
  • a display device including a display panel
  • the display panel includes an array substrate, a first electrode layer and a second electrode layer that are stacked in sequence, and at least one organic light-emitting functional part located between the first electrode layer and the second electrode layer.
  • the lighting function includes:
  • a first organic light-emitting unit is disposed on the first electrode layer and includes a first light-emitting layer
  • a first electron generation layer is provided on the first organic light-emitting unit
  • a first hole generation layer is provided on the first electron generation layer
  • a second organic light-emitting unit is disposed between the first hole generation layer and the second electrode layer, and includes a second light-emitting layer;
  • the organic light-emitting functional part further includes a first intermediate layer disposed between the first electron generation layer and the first hole generation layer.
  • the first intermediate layer is used to block holes and transport electrons.
  • the first light-emitting layer and the second light-emitting layer each include two light-emitting sub-layers that are stacked and used to emit light of different colors. In each of the light-emitting sub-layers, at least three of the light-emitting sub-layers are respectively used. To emit light of different colors.
  • the first light-emitting layer includes a first light-emitting sub-layer and a second light-emitting sub-layer disposed on a side of the first light-emitting sub-layer away from the first electrode layer
  • the second light-emitting layer includes a third light-emitting sub-layer and a fourth light-emitting sub-layer disposed on a side of the third light-emitting sub-layer away from the first electrode layer;
  • the first luminescent sub-layer is used to emit light of the first color
  • the second luminescent sub-layer and the third luminescent sub-layer are used to emit light of the second color
  • the fourth luminescent sub-layer is used to emit the third luminous sub-layer. Color light.
  • the material of the first intermediate layer is selected from one of metal compounds, alkaline metals and electron transport inorganic compounds.
  • the material of the first intermediate layer includes lithium amide, lithium fluoride or an electron-withdrawing compound.
  • the thickness of the first intermediate layer is 0.1nm ⁇ 15nm.
  • the organic light-emitting functional part further includes:
  • a third organic light-emitting unit is disposed between the second organic light-emitting unit and the second electrode layer;
  • a second hole generation layer is provided between the second electron generation layer and the third organic light-emitting unit;
  • a second intermediate layer is provided between the second electron generation layer and the second hole generation layer.
  • the second intermediate layer is used to block holes and transport electrons.
  • the material of the second intermediate layer is selected from one of metal compounds, alkaline metals and electron-transporting inorganic compounds.
  • the third organic light-emitting unit includes a third light-emitting layer, and the third light-emitting layer stacks the fifth light-emitting sublayer and the sixth light-emitting sublayer.
  • the first luminescent sub-layer and the fifth luminescent sub-layer are used to emit light of the first color
  • the second luminescent sub-layer and the third luminescent sub-layer are used to emit light of a first color.
  • the layer is used to emit light of the second color
  • the sixth luminescent sub-layer and the fourth luminescent sub-layer are used to emit light of the third color.
  • the first color light is blue light
  • the second color light is green light
  • the third color light is red light
  • Beneficial effects of the present application by arranging both the first organic light-emitting unit and the second organic light-emitting unit to have a structure with two light-emitting sub-layer stacks, the first electron generation layer and the first organic light-emitting unit are combined with each other.
  • a structure in which a first intermediate layer is provided between the hole generating layers, and the first intermediate layer is used to block holes and transport electrons, blocking and separating holes and electrons, and effectively improving the injection efficiency of carriers not only reduces the driving voltage of the display panel, but also stabilizes the driving voltage during operation, and improves the luminous efficiency and service life of the display panel.
  • FIG. 1 is a first structural schematic diagram of a display panel provided by an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of a second display panel provided by an embodiment of the present application.
  • first and second are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, features defined as “first” and “second” may explicitly or implicitly include one or more of the described features. In the description of this application, “plurality” means two or more than two, unless otherwise explicitly and specifically limited.
  • connection should be understood in a broad sense.
  • connection or integral connection; it can be mechanical connection, electrical connection or mutual communication; it can be direct connection, or indirect connection through an intermediary, it can be internal connection of two elements or interaction of two elements relation.
  • embodiments of the present application provide a display panel and a display device, which are described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments.
  • Embodiment 1 Please refer to FIG. 1.
  • This embodiment of the present application provides a display panel, including an array substrate 100, a first electrode layer 200 and a second electrode layer 300 that are stacked in sequence, and an array substrate located between the first electrode layer 200 and the second electrode layer 300.
  • the organic light-emitting functional part 400 includes:
  • the first organic light-emitting unit 410 is disposed on the first electrode layer 200 and includes a first light-emitting layer 411;
  • a first electron generation layer 420 is provided on the first organic light-emitting unit 410;
  • a first hole generation layer 430 is provided on the first electron generation layer 420;
  • the second organic light-emitting unit 440 is disposed between the first hole generation layer 430 and the second electrode layer 300, and includes a second light-emitting layer 441;
  • the organic light-emitting functional part 400 further includes a first intermediate layer 450 disposed between the first electron generation layer 420 and the first hole generation layer 430.
  • the first intermediate layer 450 is used for blocking. holes and transport electrons.
  • the first light-emitting layer 411 and the second light-emitting layer 441 each include two light-emitting sub-layers that are stacked and used to emit light of different colors. In each of the light-emitting sub-layers, at least three The light-emitting sub-layers are respectively used to emit light of different colors.
  • the first organic light-emitting unit 410 and the second organic light-emitting unit 440 are configuring the first organic light-emitting unit 410 and the second organic light-emitting unit 440 to have a structure of two light-emitting sub-layer stacks, the combination of the A structure in which a first intermediate layer 450 is provided between the first electron generation layer 420 and the first hole generation layer 430, and the first intermediate layer 450 is used to block holes and transport electrons. It blocks and separates and effectively improves the injection efficiency of carriers, which not only reduces the driving voltage of the display panel, but also stabilizes the driving voltage during operation and improves the luminous efficiency and service life of the display panel.
  • the display panel may also include a pixel definition layer disposed on the array substrate 100 and the first electrode layer 200.
  • the pixel definition layer includes a plurality of pixels.
  • a pixel opening the first electrode layer 200 includes a plurality of first electrodes, one first electrode is provided corresponding to a pixel opening, the display panel may include a plurality of the organic light-emitting functional parts 400, one The organic light-emitting functional part 400 is provided corresponding to one of the pixel openings and is located on the first electrode, and the second electrode layer 300 is provided on the pixel definition layer and the organic light-emitting functional part 400, wherein, the The material of the first electrode layer 200 may include indium tin oxide (Indium Tin Oxide, ITO) or indium zinc oxide (Indium Zinc Oxide, IZO).
  • ITO Indium Tin Oxide
  • IZO indium zinc oxide
  • the first electrode layer 200 when the material of the first electrode layer 200 is ITO, the first electrode layer 200 may be made of ITO.
  • An electrode layer 200 can be constructed by using a film layer made of silver (Ag) between two layers of ITO.
  • the material of the second electrode layer 300 can be selected from any one of silver alloy, aluminum alloy, silver and aluminum. Material.
  • the display panel further includes a light extraction layer 500 disposed on the second electrode layer 300 , and the light extraction layer 500 has a refractive index greater than 1.8.
  • the first organic light-emitting unit 410 further includes a first hole injection layer 412, a first electron blocking layer 413 and a first hole blocking layer stacked on the first electrode layer 200.
  • Layer 414, the first light emitting layer 411 is provided between the first electron blocking layer 413 and the first hole blocking layer 414, the first electron generating layer 420 is provided between the first hole blocking layer 413 and the first hole blocking layer 414.
  • the side of layer 414 away from the first light-emitting layer 411; the second organic light-emitting unit 440 also includes a second hole injection layer 442 and a second electron blocking layer stacked on the first hole generation layer 430.
  • the second light emitting layer 441 is disposed between the second electron blocking layer 443 and the second hole blocking layer 444, wherein the first hole blocking layer
  • the layer 414 and the second hole blocking layer 444 are made of materials capable of blocking holes and transporting electrons.
  • the thickness of the first hole blocking layer 414 and the second hole blocking layer 444 ranges from 3 nm to 8 nm.
  • the material of the first electron generation layer 420 may be a complex of electron transport material and metal doping, the thickness of the first electron generation layer 420 may be 8 nm to 20 nm, and the first hole generation layer 430 The material may be a P-type doped hole transport material, and the thickness of the first hole generation layer 430 may be 3 nm to 15 nm.
  • the first hole injection layer 412 includes a hole type dopant, The first electron generation layer 420 is used to provide electrons to the first light-emitting layer 411, and the first hole generation layer 430 is used to provide holes to the second organic light-emitting unit 440.
  • the first intermediate layer 450 can form an n-type deep doping and trap center, thereby effectively separating holes and electrons, stabilizing carrier transmission, and improving the relative balance of electron and hole injection, thereby Improve the stability of the organic light-emitting functional part 400.
  • the material of the first intermediate layer 450 is selected from one of metal compounds, alkaline metals and electron transport inorganic compounds. Specifically, the material of the first intermediate layer 450 can be amminated. Lithium, lithium fluoride or electron-withdrawing compounds.
  • the thickness of the first intermediate layer 450 is 0.1 nm to 15 nm. Obviously, when the thickness of the first intermediate layer 450 is less than 0.1 nm, the Without effective separation of holes and electrons, the driving voltage of the display panel cannot be improved. When the thickness of the first intermediate layer 450 is greater than 15 nm, the performance of the organic light-emitting functional part 400 may be easily degraded.
  • the first light-emitting layer 411 and the second light-emitting layer 441 each include two light-emitting sub-layers that are stacked and used to emit light of different colors.
  • three of the light-emitting sub-layers are The sub-layers are respectively used to emit light of different colors.
  • three of the light-emitting sub-layers can be used to emit blue light, green light and red light respectively, and the other of the light-emitting sub-layers can be used to emit blue light, green light and red light respectively.
  • the layer can be used to emit one of blue light, green light and red light.
  • the display panel can also be provided with a filter structure on the light exit side of the display panel, and the blue light can be realized through the filter structure.
  • the light, green light and red light are combined to form white light.
  • the light filter structure may be a light filter.
  • the first light-emitting layer 411 includes a first light-emitting sub-layer 4111 and a second light-emitting sub-layer 4112 disposed on the side of the first light-emitting sub-layer 4111 away from the first electrode layer 200
  • the second light-emitting layer 441 includes a third light-emitting sub-layer 4411 and a fourth light-emitting sub-layer 4412 disposed on the side of the third light-emitting sub-layer 4411 away from the first electrode layer 200;
  • the first light-emitting sub-layer 4111 is used to emit light of the first color
  • the second light-emitting sub-layer 4112 and the third light-emitting sub-layer 4411 are used to emit light of the second color
  • the fourth light-emitting sub-layer 4412 is used to emit light of the second color. To emit light of the third color.
  • the first light-emitting sub-layer 4111, the second light-emitting sub-layer 4112, the third light-emitting sub-layer 4411 and the fourth light-emitting sub-layer 4412 are capable of emitting light of the first color
  • the second color light and the third color light can be set according to specific needs, wherein the first light-emitting sub-layer 4111, the second light-emitting sub-layer 4112, the third light-emitting sub-layer 4411 and The fourth light-emitting sub-layer 4412 can use the same material or different doping materials.
  • the first light-emitting sub-layer 4111 is used to emit light of the first color
  • the second light-emitting sub-layer 4412 can use the same material.
  • the layer 4112 and the third luminescent sub-layer 4411 are used to emit second color light
  • the fourth luminescent sub-layer 4412 is used to emit third color light.
  • the first color light may be blue light
  • the second color light may be green light
  • the third color light may be red light.
  • the material of the first light-emitting sublayer 4111 may be a blue fluorescent material, specifically a thermally activated delayed fluorescent material.
  • the second light-emitting sub-layer 4112, the third light-emitting sub-layer 4411 and the fourth light-emitting sub-layer 4412 may include hole-type dopants and electrons At least one type of dopant, specifically, the second light-emitting sub-layer 4112, the third light-emitting sub-layer 4411 and the fourth light-emitting sub-layer 4412 can use Single Host-Dopant phosphorescent type material or Pre- mix Host-Dopant material.
  • the organic light-emitting functional part 400 further includes:
  • the third organic light-emitting unit 460 is disposed between the second organic light-emitting unit 440 and the second electrode layer 300;
  • the second electron generation layer 470 is disposed between the second organic light-emitting unit 440 and the third organic light-emitting unit 460;
  • a second hole generation layer 480 is provided between the second electron generation layer 470 and the third organic light emitting unit 460;
  • the second intermediate layer 490 is disposed between the second electron generation layer 470 and the second hole generation layer 480.
  • the second intermediate layer 490 is used to block holes and transport electrons. It can be understood that the second electron generation layer 470 is used to provide electrons for the second organic light-emitting unit 440, and the second hole generation layer 480 is used to provide holes for the third organic light-emitting unit 460.
  • the second intermediate layer 490 is disposed between the second electron generation layer 470 and the second hole generation layer 480, by blocking and separating holes and electrons, and effectively improves the carrier
  • the injection efficiency not only reduces the driving voltage of the display panel, but also stabilizes the driving voltage during operation, improving the luminous efficiency and service life of the display panel;
  • the material of the second intermediate layer 490 is selected from metals One of compounds, alkaline metals and electron transport inorganic compounds.
  • the second intermediate layer 490 is made of the same material as the first intermediate layer 450, and the thickness of the second intermediate layer 490 is the same as that of the first intermediate layer 450.
  • the thickness of the first intermediate layer 450 is the same, which will not be described again.
  • the third organic light-emitting unit 460 includes a third light-emitting layer 461, and the third light-emitting layer 461 stacks the fifth light-emitting sub-layer 4611 and the sixth light-emitting sub-layer 4612, wherein, Specifically, the third organic light-emitting unit 460 further includes a third hole injection layer 462, a third electron blocking layer 463 and a third hole blocking layer 464 that are stacked on the third organic light-emitting layer 461. between the three electron blocking layers 463 and the third hole blocking layer 464 .
  • the third light-emitting layer 461 is stacked with the fifth light-emitting sub-layer 4611 and the sixth light-emitting sub-layer 4612.
  • the third organic light-emitting unit 460 also has a structure of dual light-emitting sub-layers.
  • the first light-emitting sub-layer 4111 and the fifth light-emitting sub-layer 4611 are used to emit light of the first color
  • the second light-emitting sub-layer 4112 and the third light-emitting sub-layer 4411 are used to emit light of the third color. Two colors of light.
  • the sixth luminescent sub-layer 4612 and the fourth luminescent sub-layer 4412 are used to emit a third color of light.
  • the first color of light is blue light
  • the second color of light is The light is green light
  • the third color light is red light
  • the first light-emitting sublayer 4111 and the fifth light-emitting sublayer 4611 are made of the same material
  • the second light-emitting sublayer 4112 and the The third light-emitting sub-layer 4411 is made of the same material
  • the sixth light-emitting sub-layer 4612 and the fourth light-emitting sub-layer 4412 are made of the same material.
  • Example 1 As shown in Table 1, it is the comparative data of the device performance of Example 1, Example 2 and each comparative example of the present application. It can be understood that in different comparative examples and examples in Table 1, such as driving voltage, photometric efficiency, current efficiency and lifetime, etc.
  • the data of performance parameters are quantified based on the performance parameters in Comparative Example 2.
  • Comparative Example 1 the difference between Comparative Example 1 and Embodiment 1 is that the light-emitting device adopts a single layer of light-emitting sub-layer and lacks the first intermediate layer 450 .
  • Comparative Example 2 and Embodiment 1 the difference between Comparative Example 2 and Embodiment 1 is that it lacks the third intermediate layer 450 .
  • the sub-layer 4411 is used to emit second green light, and the fourth luminescent sub-layer 4412 is used to emit red light.
  • Comparative Example 2 using a double-layer luminescent sub-layer structure not only reduces the drive
  • the voltage, as well as the photometric efficiency, current efficiency (External quantum efficiency, EQE) and life span indicators are all improved, and compared with Comparative Example 2, Embodiment 1 using the first intermediate layer 450 further reduces the driving The voltage also further improves the photometric efficiency, current efficiency and lifespan of the organic light-emitting functional part 400.
  • Comparative Example 3 and Embodiment 1 the difference between Comparative Example 3 and Embodiment 1 is that the light-emitting device uses a single layer of light-emitting sub-layer and lacks the first intermediate layer 450 and the second barrier layer.
  • Comparative Example 3 and Embodiment 2 The difference between Comparative Example 3 and Embodiment 2 is that The problem lies in the lack of the first intermediate layer 450 and the second barrier layer, wherein Embodiment 2 has a structure as shown in Figure 2.
  • Comparative Example 4 using a double-layer light-emitting sub-layer structure not only reduces the driving voltage, but also has better photometric efficiency, current efficiency (External quantum efficiency, EQE) and lifespan.
  • Embodiment 2 using the first intermediate layer 450 and the second barrier layer further reduces the driving voltage and further improves the photometric efficiency of the organic light-emitting functional part 400. Current efficiency and lifetime.
  • the materials of the first light-emitting sub-layer 4111, the second light-emitting sub-layer 4112, the third light-emitting sub-layer 4411 and the fourth light-emitting sub-layer 4412 can be determined according to specific requirements.
  • the light emission color is set, and the materials of the first light-emitting sub-layer 4111, the second light-emitting sub-layer 4112, the third light-emitting sub-layer 4411 and the fourth light-emitting sub-layer 4412 have different combinations, as shown in In the structure shown in Figure 1, compared with other combinations of emitting light of different colors, as shown in Table 1 in Example 1, the first luminescent sub-layer 4111 is used to emit blue light, and the second luminescent sub-layer 4112 is used to emit blue light.
  • the third light-emitting sub-layer 4411 is used to emit the second green light, and the fourth light-emitting sub-layer 4412 is used to emit red light.
  • the structure has superior driving voltage, photometric efficiency, current efficiency and lifespan. performance.
  • the materials of the layer 4611 and the sixth light-emitting sub-layer 4612 can be set according to the specific light emission color.
  • the first light-emitting sub-layer 4111, the second light-emitting sub-layer 4112, the third light-emitting sub-layer 4411, the The materials of the fourth light-emitting sub-layer 4412, the fifth light-emitting sub-layer 4611 and the sixth light-emitting sub-layer 4612 have different combinations.
  • the first luminescent sub-layer 4111 and the fifth luminescent sub-layer 4611 are used to emit blue light
  • the second luminescent sub-layer 4112 and the third luminescent sub-layer are used to emit blue light
  • the sub-layer 4411 is used to emit green light
  • the sixth light-emitting sub-layer 4612 and the fourth light-emitting sub-layer 4412 are used to emit red light.
  • the structures have better driving voltage, photometric efficiency, current efficiency and lifespan. performance.
  • a display device is also provided, and the display device includes the display panel as described in any of the previous embodiments.
  • the first organic light-emitting unit 410 and the second organic light-emitting unit 440 are both configured to have a structure of two light-emitting sub-layer stacks, thereby combining the first electron generation layer 420 and the third
  • the structure of the first intermediate layer 450 between the hole generation layers 430 blocks and separates holes and electrons, and effectively improves the carrier injection efficiency, which not only reduces the driving voltage of the display panel, but also stabilizes the The driving voltage during operation improves the luminous efficiency and service life of the display panel.

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Abstract

一种显示面板及显示装置；显示面板包括有机发光功能部（400），有机发光功能部（400）包括层叠设置的第一有机发光单元（410）、第一电子产生层（420）、第一空穴产生层（430）和第二有机发光单元（440），第一电子产生层（420）与第一空穴产生层（430）之间设置有第一中间层（450），第一发光层（411）和第二发光层（441）均包括两层叠设置且用于出射不同颜色光线的发光子层。

Description

显示面板及显示装置 技术领域
本申请涉及显示领域，特别涉及一种显示面板及显示装置。
背景技术
随着显示技术的发展，有机发光二极管((Organic Light-Emitting Diode，OLED)显示器件受到了广泛关注。
目前，通常采用叠层的发光器件结构以提高显示面板的亮度和使用寿命，然而，叠层的发光器件结构易出现驱动电压过高的问题，同时也降低了器件的电流效率，导致器件使用寿命提升有限。
技术问题
本申请实施例提供一种显示面板及显示装置，以解决叠层的发光器件结构易导致显示面板出现驱动电压过高的技术问题。
技术解决方案
本申请实施例提供一种显示面板，包括依次层叠设置的阵列基板、第一电极层和第二电极层、以及位于所述第一电极层与所述第二电极层之间的至少一有机发光功能部，所述有机发光功能部包括：
第一有机发光单元，设置于所述第一电极层上，包括第一发光层；
第一电子产生层，设置于所述第一有机发光单元上；
第一空穴产生层，设置于所述第一电子产生层上；
第二有机发光单元，设置于所述第一空穴产生层与所述第二电极层之间，包括第二发光层；
其中，所述有机发光功能部还包括设置于所述第一电子产生层与所述第一空穴产生层之间的第一中间层，所述第一中间层用于阻隔空穴且传输电子，所述第一发光层和所述第二发光层均包括两个层叠设置且用于出射不同颜色光 线的发光子层，各所述发光子层中，至少三个所述发光子层分别用于出射不同颜色光线。
在本申请实施例所提供的显示面板中，所述第一中间层的材料选自金属类化合物、碱性金属和电子传输型无机化合物中的一种，
在本申请实施例所提供的显示面板中，所述第一中间层的材料包括氨基化锂、氟化锂或吸电子化合物。
在本申请实施例所提供的显示面板中，所述第一中间层的厚度为0.1nm～15nm。
在本申请实施例所提供的显示面板中，所述第一发光层包括第一发光子层和设置于所述第一发光子层远离所述第一电极层一侧的第二发光子层，所述第二发光层包括第三发光子层和设置于所述第三发光子层远离所述第一电极层一侧的第四发光子层；
所述第一发光子层用于出射第一颜色光线，所述第二发光子层和所述第三发光子层用于出射第二颜色光线，所述第四发光子层用于出射第三颜色光线。
在本申请实施例所提供的显示面板中，所述有机发光功能部还包括：
第三有机发光单元，设置于所述第二有机发光单元与所述第二电极层之间；
第二电子产生层，设置于所述第二有机发光单元与所述第三有机发光单元之间；
第二空穴产生层，设置于所述第二电子产生层与所述第三有机发光单元之间；
第二中间层，设置于所述第二电子产生层与所述第二空穴产生层之间，所述第二中间层用于阻隔空穴且传输电子。
在本申请实施例所提供的显示面板中，所述第二中间层的材料选自金属类化合物、碱性金属和电子传输型无机化合物中的一种。
在本申请实施例所提供的显示面板中，所述第三有机发光单元包括第三发光层，所述第三发光层层叠所述的第五发光子层和第六发光子层。
在本申请实施例所提供的显示面板中，所述第一发光子层和所述第五发光子层且用于出射第一颜色光线，所述第二发光子层和所述第三发光子层用于出 射第二颜色光线，所述第六发光子层和所述第四发光子层用于出射第三颜色光线。
在本申请实施例所提供的显示面板中，所述第一颜色光线为蓝色光线，所述第二颜色光线为绿色光线，所述第三颜色光线为红色光线。
相应的还提供一种显示装置，所述显示装置包括显示面板；
所述显示面板包括依次层叠设置的阵列基板、第一电极层和第二电极层、以及位于所述第一电极层与所述第二电极层之间的至少一有机发光功能部，所述有机发光功能部包括：
第一有机发光单元，设置于所述第一电极层上，包括第一发光层；
第一电子产生层，设置于所述第一有机发光单元上；
第一空穴产生层，设置于所述第一电子产生层上；
第二有机发光单元，设置于所述第一空穴产生层与所述第二电极层之间，包括第二发光层；
其中，所述有机发光功能部还包括设置于所述第一电子产生层与所述第一空穴产生层之间的第一中间层，所述第一中间层用于阻隔空穴且传输电子，所述第一发光层和所述第二发光层均包括两个层叠设置且用于出射不同颜色光线的发光子层，各所述发光子层中，至少三个所述发光子层分别用于出射不同颜色光线。
在本申请实施例所提供的显示装置中，所述第一发光层包括第一发光子层和设置于所述第一发光子层远离所述第一电极层一侧的第二发光子层，所述第二发光层包括第三发光子层和设置于所述第三发光子层远离所述第一电极层一侧的第四发光子层；
所述第一发光子层用于出射第一颜色光线，所述第二发光子层和所述第三发光子层用于出射第二颜色光线，所述第四发光子层用于出射第三颜色光线。
在本申请实施例所提供的显示装置中，所述第一中间层的材料选自金属类化合物、碱性金属和电子传输型无机化合物中的一种
在本申请实施例所提供的显示装置中，所述第一中间层的材料包括氨基化锂、氟化锂或吸电子化合物。
在本申请实施例所提供的显示装置中，所述第一中间层的厚度为 0.1nm～15nm。
在本申请实施例所提供的显示装置中，所述有机发光功能部还包括：
第三有机发光单元，设置于所述第二有机发光单元与所述第二电极层之间；
第二电子产生层，设置于所述第二有机发光单元与所述第三有机发光单元之间；
第二空穴产生层，设置于所述第二电子产生层与所述第三有机发光单元之间；
第二中间层，设置于所述第二电子产生层与所述第二空穴产生层之间，所述第二中间层用于阻隔空穴且传输电子。
在本申请实施例所提供的显示装置中，所述第二中间层的材料选自金属类化合物、碱性金属和电子传输型无机化合物中的一种。
在本申请实施例所提供的显示装置中，所述第三有机发光单元包括第三发光层，所述第三发光层层叠所述的第五发光子层和第六发光子层。
在本申请实施例所提供的显示装置中，所述第一发光子层和所述第五发光子层且用于出射第一颜色光线，所述第二发光子层和所述第三发光子层用于出射第二颜色光线，所述第六发光子层和所述第四发光子层用于出射第三颜色光线。
在本申请实施例所提供的显示装置中，所述第一颜色光线为蓝色光线，所述第二颜色光线为绿色光线，所述第三颜色光线为红色光线。
有益效果
本申请的有益效果：通过将所述第一有机发光单元和所述第二有机发光单元均设置成具有两层发光子层堆叠的结构，结合在所述第一电子产生层与所述第一空穴产生层之间设置第一中间层的结构，且所述第一中间层用于阻隔空穴且传输电子，对空穴和电子进行阻隔和分离，并有效改善了载流子的注入效率，不仅降低了显示面板的驱动电压，也稳定了工作时的驱动电压，提高了显示面板的发光效率和使用寿命。
附图说明
为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例所提供显示面板的第一种结构示意图。
图2为本申请实施例所提供显示面板的第二种结构示意图。
本发明的实施方式
以下各实施例的说明是参考附加的图示，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。在图中，结构相似的单元是用以相同标号表示。
在本申请的描述中，需要理解的是，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接或可以相互通讯；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
本申请实施例为了解决上述问题，提供一种显示面板及显示装置，以下分别进行详细说明。需说明的是，以下实施例的描述顺序不作为对实施例优选顺 序的限定。
实施例1，请参阅图1，本申请实施例提供一种显示面板，包括依次层叠设置的阵列基板100、第一电极层200和第二电极层300、以及位于所述第一电极层200与所述第二电极层300之间的至少一有机发光功能部400，所述有机发光功能部400包括：
第一有机发光单元410，设置于所述第一电极层200上，包括第一发光层411；
第一电子产生层420，设置于所述第一有机发光单元410上；
第一空穴产生层430，设置于所述第一电子产生层420上；
第二有机发光单元440，设置于所述第一空穴产生层430与所述第二电极层300之间，包括第二发光层441；
其中，所述有机发光功能部400还包括设置于所述第一电子产生层420与所述第一空穴产生层430之间的第一中间层450，所述第一中间层用450于阻隔空穴且传输电子，所述第一发光层411和所述第二发光层441均包括两个层叠设置且用于出射不同颜色光线的发光子层，各所述发光子层中，至少三个所述发光子层分别用于出射不同颜色光线。
可以理解的是，目前，通常采用不同颜色叠层的发光器件结构以提高显示面板的亮度和使用寿命，然而，叠层的发光器件结构易出现驱动电压过高的问题，同时也降低了器件的电流效率，导致器件使用寿命提升有限，本实施例中，通过将所述第一有机发光单元410和所述第二有机发光单元440均设置成具有两层发光子层堆叠的结构，结合在所述第一电子产生层420与所述第一空穴产生层430之间设置第一中间层450的结构，且所述第一中间层450用于阻隔空穴且传输电子，对空穴和电子进行阻隔和分离，并有效改善了载流子的注入效率，不仅降低了显示面板的驱动电压，也稳定了工作时的驱动电压，提高了显示面板的发光效率和使用寿命。
需要说明的是，以所述显示面板为顶发光结构为例，所述显示面板还可以包括设置于所述阵列基板100和第一电极层200上的像素定义层，所述像素定义层包括多个像素开口，所述第一电极层200包括多个第一电极，一所述第一电极对应一所述像素开口设置，所述显示面板可以包括多个所述有机发光功能 部400，一所述有机发光功能部400对应一所述像素开口设置且位于所述第一电极上，所述第二电极层300设置于所述像素定义层和所述有机发光功能部400上，其中，所述第一电极层200的材料可以包括氧化铟锡(Indium Tin Oxide,ITO)或氧化铟锌(Indium Zinc Oxide，IZO)，具体的，当所述第一电极层200的材料ITO时，所述第一电极层200可以采用两层ITO中间设置一层材料为银(Ag)的膜层叠构，所述第二电极层300的材料可以选自银合金、铝合金、银及铝之中的任一材料。
所述显示面板还包括设置于所述第二电极层300上的光取出层500，所述光取出层500的折射率大于1.8。
承上，本实施例中，所述第一有机发光单元410还包括层叠设置于所述第一电极层200上的第一空穴注入层412、第一电子阻挡层413和第一空穴阻挡层414，所述第一发光层411设置于所述第一电子阻挡层413与所述第一空穴阻挡层414之间，所述第一电子产生层420设置于所述第一空穴阻挡层414远离所述第一发光层411的一侧；所述第二有机发光单元440还包括层叠设置于所述第一空穴产生层430上的第二空穴注入层442、第二电子阻挡层443和第二空穴阻挡层444，所述第二发光层441设置于所述第二电子阻挡层443与所述第二空穴阻挡层444之间，其中，所述第一空穴阻挡层414和所述第二空穴阻挡层444采用具有阻挡空穴和传输电子的材料，所述第一空穴阻挡层414和所述第二空穴阻挡层444的厚度范围均为3nm～8nm，所述第一电子产生层420的材料可以是电子传输型材料与金属参杂的配合物，所述第一电子产生层420的厚度可以是8nm～20nm，所述第一空穴产生层430的材料可以P型掺杂的空穴传输材料，所述第一空穴产生层430的厚度可以是3nm～15nm，具体的，所述第一空穴注入层412包括空穴型掺杂物，所述第一电子产生层420用于向所述第一发光层411提供电子，所述第一空穴产生层430用于向所述第二有机发光单元440提供空穴，在所述显示面板显示的过程中，所述第一中间层450可以形成n型深掺杂与陷阱中心，从而有效分离空穴和电子，稳定载流子的传输，改善了电子和空穴注入的相对平衡，从而提高有机发光功能部400的稳定性。
本实施例中，所述第一中间层450的材料选自金属类化合物、碱性金属和 电子传输型无机化合物中的一种，具体的，所述第一中间层450的材料可以是氨基化锂、氟化锂或吸电子化合物，此外，本实施例中，所述第一中间层450的厚度为0.1nm～15nm，显然，当所述第一中间层450的厚度小于0.1nm时，达不到对空穴和电子进行有效分离的作用，无法改善显示面板的驱动电压，当所述第一中间层450的厚度大于15nm时，容易导致有机发光功能部400的性能下降。
值得注意的是，所述第一发光层411和所述第二发光层441均包括两层叠设置且用于出射不同颜色光线的发光子层，各所述发光子层中，三个所述发光子层分别用于出射不同颜色光线，显然，四个所述发光子层中，其中三个所述发光子层可以分别用于出射蓝色光线、绿色光线和红色光线，另一所述发光子层可以用于出射蓝色光线、绿色光线和红色光线中的其中一种，所述显示面板还可以在所述显示面板的出光侧设置滤光结构，通过所述滤光结构实现所述蓝色光线、绿色光线和红色光线组合形成白光，具体的，所述滤光结构可以是滤光片。
承上，本实施例中，所述第一发光层411包括第一发光子层4111和设置于所述第一发光子层4111远离所述第一电极层200一侧的第二发光子层4112，所述第二发光层441包括第三发光子层4411和设置于所述第三发光子层4411远离所述第一电极层200一侧的第四发光子层4412；
所述第一发光子层4111用于出射第一颜色光线，所述第二发光子层4112和所述第三发光子层4411用于出射第二颜色光线，所述第四发光子层4412用于出射第三颜色光线。
可以理解的是，所述第一发光子层4111、所述第二发光子层4112、所述第三发光子层4411和所述第四发光子层4412，在满足能够出射第一颜色光线、第二颜色光线和所述第三颜色光线的基础上可以根据具体需要进行设置，其中，所述第一发光子层4111、所述第二发光子层4112、所述第三发光子层4411和所述第四发光子层4412可以采用相同的材料，也可以采用不同的掺杂材料，本实施例中，所述第一发光子层4111用于出射第一颜色光线，所述第二发光子层4112和所述第三发光子层4411用于出射第二颜色光线，所述第四发光子层4412用于出射第三颜色光线，具体的，所述第一颜色光线可以为蓝色光线， 所述第二颜色光线可以为绿色光线，所述第三颜色光线可以为红色光线，此时，所述第一发光子层4111的材料可以是蓝色荧光材料，具体可以是热激活延迟荧光材料(Thermally Activated Delayed Fluorescence，TADF)或超荧光材料等，所述第二发光子层4112、所述第三发光子层4411和所述第四发光子层4412可以包括空穴型掺杂物和电子型掺杂物的至少一种，具体的，所述第二发光子层4112、所述第三发光子层4411和所述第四发光子层4412可以采用Single Host-Dopant磷光类型材料或Pre-mix Host-Dopant材料。
实施例2，在前述实施例的基础上，请参阅图2，所述有机发光功能部400还包括：
第三有机发光单元460，设置于所述第二有机发光单元440与所述第二电极层300之间；
第二电子产生层470，设置于所述第二有机发光单元440与所述第三有机发光单元460之间；
第二空穴产生层480，设置于所述第二电子产生层470与所述第三有机发光单元460之间；
第二中间层490，设置于所述第二电子产生层470与所述第二空穴产生层480之间，所述第二中间层490用于阻隔空穴且传输电子。可以理解的是，所述第二电子产生层470用于为所述第二有机发光单元440提供电子，所述第二空穴产生层480用于为所述第三有机发光单元460提供空穴，所述第二中间层490设置于所述第二电子产生层470与所述第二空穴产生层480之间，通过对空穴和电子进行阻隔和分离，并有效改善了载流子的注入效率，不仅降低了显示面板的驱动电压，也稳定了工作时的驱动电压，提高了显示面板的发光效率和使用寿命；本实施例中，所述第二中间层490的材料选自金属类化合物、碱性金属和电子传输型无机化合物中的一种，具体的，所述第二中间层490与所述第一中间层450的材料相同，且所述第二中间层490的厚度与所述第一中间层450的厚度相同，在此不再赘述。
承上，本实施例中，所述第三有机发光单元460包括第三发光层461，所述第三发光层461层叠所述的第五发光子层4611和第六发光子层4612，其中，具体的，第三有机发光单元460还包括层叠设置于的第三空穴注入层462、第 三电子阻挡层463和第三空穴阻挡层464，所述第三发光层461设置于所述第三电子阻挡层463与所述第三空穴阻挡层464之间。
可以理解的是，所述第三发光层461层叠所述的第五发光子层4611和第六发光子层4612，显然，所述第三有机发光单元460也是双发光子层的结构，本实施例中，所述第一发光子层4111和所述第五发光子层4611且用于出射第一颜色光线，所述第二发光子层4112和所述第三发光子层4411用于出射第二颜色光线，所述第六发光子层4612和所述第四发光子层4412用于出射第三颜色光线，本实施例中，所述第一颜色光线为蓝色光线，所述第二颜色光线为绿色光线，所述第三颜色光线为红色光线，此时，所述第一发光子层4111和所述第五发光子层4611的材料相同，所述第二发光子层4112和所述第三发光子层4411的材料相同，所述第六发光子层4612和所述第四发光子层4412的材料相同。
如表1，为本申请实施例1、实施例2以及各对比例器件性能对比数据，可以理解的是，表1中不同对比例和实施例中诸如驱动电压、光度效率、电流效率和寿命等性能参数的数据均以对比例2中的性能参数为基准进行量化说明。
性能 对比例1 对比例2 实施例1 对比例3 对比例4 实施例2
驱动电压(V) 105.00％ 100％ 96.50％ 186.00％ 182.00％ 173.70％
光度效率(Cd/A) 92.00％ 100％ 105.40％ 162.00％ 173.10％ 179.20％
电流效率(EQE) 91.00％ 100％ 104.50％ 161.00％ 160.50％ 167.30％
寿命 90.00％ 100％ 137.00％ 240.00％ 268.00％ 301.40％
表1 器件性能对比数据
需要说明的是，对比例1相比实施例1区别在于发光器件中采用单层的发光子层，且缺少所述第一中间层450，对比例2相比实施例1区别在于缺少所述第一中间层450，其中，实施例1为如图1所示结构，具体的，所述第一发光子层4111用于出射蓝色光线，所述第二发光子层4112和所述第三发光子层4411用于出射第二绿色光线，所述第四发光子层4412用于出射红色光线，显然，相比于对比例1，采用双层的发光子层结构的对比例2不仅降低了驱动电 压、而且在光度效率、电流效率(External quantum efficiency，EQE)和寿命各项指标均有提升，并且，相比于对比例2，采用所述第一中间层450的实施例1进一步降低了驱动电压，也进一步提高了有机发光功能部400的光度效率、电流效率和寿命。
承上，对比例3相比实施例1区别在于发光器件中采用单层的发光子层，且缺少所述第一中间层450和所述第二阻隔层，对比例4相比实施例2区别在于缺少所述第一中间层450和所述第二阻隔层，其中，实施例2为如图2所示结构，具体的，所述第一发光子层4111和所述第五发光子层4611且用于出射蓝色光线，所述第二发光子层4112和所述第三发光子层4411用于出射绿色，所述第六发光子层4612和所述第四发光子层4412用于出射红色光线，显然，相比于对比例3，采用双层的发光子层结构的对比例4不仅降低了驱动电压、而且在光度效率、电流效率(External quantum efficiency，EQE)和寿命各项指标均有提升，并且，相比于对比例4，采用所述第一中间层450和所述第二阻隔层的实施例2进一步降低了驱动电压，也进一步提高了有机发光功能部400的光度效率、电流效率和寿命。
值得注意的是，实施例1中，所述第一发光子层4111、所述第二发光子层4112、所述第三发光子层4411和所述第四发光子层4412的材料可以根据具体出光颜色进行设置，所述第一发光子层4111、所述第二发光子层4112、所述第三发光子层4411和所述第四发光子层4412的材料的有不同的组合，在如图1所示的结构中，相比于其它出射不同颜色光线的组合，如表1实施例1中采用所述第一发光子层4111用于出射蓝色光线，所述第二发光子层4112和所述第三发光子层4411用于出射第二绿色光线，所述第四发光子层4412用于出射红色光线的结构在驱动电压、光度效率、电流效率和寿命各项指标均具有较优的性能。
同理，实施例2中，所述第一发光子层4111、所述第二发光子层4112、所述第三发光子层4411、所述第四发光子层4412、所述第五发光子层4611和所述第六发光子层4612的材料可以根据具体出光颜色进行设置，所述第一发光子层4111、所述第二发光子层4112、所述第三发光子层4411、所述第四发光子层4412、所述第五发光子层4611和所述第六发光子层4612的材料的有 不同的组合，在如图2所示的结构中，相比于其它出射不同颜色光线的组合，如表1实施例3中采用所述第一发光子层4111和所述第五发光子层4611且用于出射蓝色光线，所述第二发光子层4112和所述第三发光子层4411用于出射绿色，所述第六发光子层4612和所述第四发光子层4412用于出射红色光线的结构在驱动电压、光度效率、电流效率和寿命各项指标均具有较优的性能。
相应的还提供一种显示装置，所述显示装置包括如前任意一项实施例所述的显示面板。
本申请实施例通过将所述第一有机发光单元410和所述第二有机发光单元440均设置成具有两层发光子层堆叠的结构，结合在所述第一电子产生层420与所述第一空穴产生层430之间设置第一中间层450的结构，对空穴和电子进行阻隔和分离，并有效改善了载流子的注入效率，不仅降低了显示面板的驱动电压，也稳定了工作时的驱动电压，提高了显示面板的发光效率和使用寿命。
综上所述，虽然本发明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发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (20)

  1. 一种显示面板，其特征在于，包括依次层叠设置的阵列基板、第一电极层和第二电极层、以及位于所述第一电极层与所述第二电极层之间的至少一有机发光功能部，所述有机发光功能部包括：
    第一有机发光单元，设置于所述第一电极层上，包括第一发光层；
    第一电子产生层，设置于所述第一有机发光单元上；
    第一空穴产生层，设置于所述第一电子产生层上；
    第二有机发光单元，设置于所述第一空穴产生层与所述第二电极层之间，包括第二发光层；
    其中，所述有机发光功能部还包括设置于所述第一电子产生层与所述第一空穴产生层之间的第一中间层，所述第一中间层用于阻隔空穴且传输电子，所述第一发光层和所述第二发光层均包括两个层叠设置且用于出射不同颜色光线的发光子层，各所述发光子层中，至少三个所述发光子层分别用于出射不同颜色光线。
  2. 根据权利要求1所述的显示面板，其特征在于，所述第一发光层包括第一发光子层和设置于所述第一发光子层远离所述第一电极层一侧的第二发光子层，所述第二发光层包括第三发光子层和设置于所述第三发光子层远离所述第一电极层一侧的第四发光子层；
    所述第一发光子层用于出射第一颜色光线，所述第二发光子层和所述第三发光子层用于出射第二颜色光线，所述第四发光子层用于出射第三颜色光线。
  3. 根据权利要求1所述的显示面板，其特征在于，所述第一中间层的材料选自金属类化合物、碱性金属和电子传输型无机化合物中的一种
  4. 根据权利要求3所述的显示面板，其特征在于，所述第一中间层的材料包括氨基化锂、氟化锂或吸电子化合物。
  5. 根据权利要求1所述的显示面板，其特征在于，所述第一中间层的厚度为0.1nm～15nm。
  6. 根据权利要求1所述的显示面板，其特征在于，所述有机发光功能部还包括：
    第三有机发光单元，设置于所述第二有机发光单元与所述第二电极层之间；
    第二电子产生层，设置于所述第二有机发光单元与所述第三有机发光单元之间；
    第二空穴产生层，设置于所述第二电子产生层与所述第三有机发光单元之间；
    第二中间层，设置于所述第二电子产生层与所述第二空穴产生层之间，所述第二中间层用于阻隔空穴且传输电子。
  7. 根据权利要求6所述的显示面板，其特征在于，所述第二中间层的材料选自金属类化合物、碱性金属和电子传输型无机化合物中的一种。
  8. 根据权利要求6所述的显示面板，其特征在于，所述第三有机发光单元包括第三发光层，所述第三发光层层叠所述的第五发光子层和第六发光子层。
  9. 根据权利要求8所述的显示面板，其特征在于，所述第一发光子层和所述第五发光子层且用于出射第一颜色光线，所述第二发光子层和所述第三发光子层用于出射第二颜色光线，所述第六发光子层和所述第四发光子层用于出射第三颜色光线。
  10. 根据权利要求2所述的显示面板，其特征在于，所述第一颜色光线为蓝色光线，所述第二颜色光线为绿色光线，所述第三颜色光线为红色光线。
  11. 一种显示装置，其特征在于，所述显示装置包括显示面板；
    所述显示面板包括依次层叠设置的阵列基板、第一电极层和第二电极层、以及位于所述第一电极层与所述第二电极层之间的至少一有机发光功能部，所述有机发光功能部包括：
    第一有机发光单元，设置于所述第一电极层上，包括第一发光层；
    第一电子产生层，设置于所述第一有机发光单元上；
    第一空穴产生层，设置于所述第一电子产生层上；
    第二有机发光单元，设置于所述第一空穴产生层与所述第二电极层之间，包括第二发光层；
    其中，所述有机发光功能部还包括设置于所述第一电子产生层与所述第一 空穴产生层之间的第一中间层，所述第一中间层用于阻隔空穴且传输电子，所述第一发光层和所述第二发光层均包括两个层叠设置且用于出射不同颜色光线的发光子层，各所述发光子层中，至少三个所述发光子层分别用于出射不同颜色光线。
  12. 根据权利要求11所述的显示装置，其特征在于，所述第一发光层包括第一发光子层和设置于所述第一发光子层远离所述第一电极层一侧的第二发光子层，所述第二发光层包括第三发光子层和设置于所述第三发光子层远离所述第一电极层一侧的第四发光子层；
    所述第一发光子层用于出射第一颜色光线，所述第二发光子层和所述第三发光子层用于出射第二颜色光线，所述第四发光子层用于出射第三颜色光线。
  13. 根据权利要求11所述的显示装置，其特征在于，所述第一中间层的材料选自金属类化合物、碱性金属和电子传输型无机化合物中的一种
  14. 根据权利要求13所述的显示装置，其特征在于，所述第一中间层的材料包括氨基化锂、氟化锂或吸电子化合物。
  15. 根据权利要求11所述的显示装置，其特征在于，所述第一中间层的厚度为0.1nm～15nm。
  16. 根据权利要求11所述的显示装置，其特征在于，所述有机发光功能部还包括：
    第三有机发光单元，设置于所述第二有机发光单元与所述第二电极层之间；
    第二电子产生层，设置于所述第二有机发光单元与所述第三有机发光单元之间；
    第二空穴产生层，设置于所述第二电子产生层与所述第三有机发光单元之间；
    第二中间层，设置于所述第二电子产生层与所述第二空穴产生层之间，所述第二中间层用于阻隔空穴且传输电子。
  17. 根据权利要求16所述的显示装置，其特征在于，所述第二中间层的材料选自金属类化合物、碱性金属和电子传输型无机化合物中的一种。
  18. 根据权利要求16所述的显示装置，其特征在于，所述第三有机发光 单元包括第三发光层，所述第三发光层层叠所述的第五发光子层和第六发光子层。
  19. 根据权利要求18所述的显示装置，其特征在于，所述第一发光子层和所述第五发光子层且用于出射第一颜色光线，所述第二发光子层和所述第三发光子层用于出射第二颜色光线，所述第六发光子层和所述第四发光子层用于出射第三颜色光线。
  20. 根据权利要求12所述的显示装置，其特征在于，所述第一颜色光线为蓝色光线，所述第二颜色光线为绿色光线，所述第三颜色光线为红色光线。
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