CN115207239A - Display panel and display device - Google Patents
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- CN115207239A CN115207239A CN202210774304.8A CN202210774304A CN115207239A CN 115207239 A CN115207239 A CN 115207239A CN 202210774304 A CN202210774304 A CN 202210774304A CN 115207239 A CN115207239 A CN 115207239A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
- H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
- H10K50/13—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit
- H10K50/131—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit with spacer layers between the electroluminescent layers
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- H—ELECTRICITY
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- H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
- H10K30/80—Constructional details
- H10K30/865—Intermediate layers comprising a mixture of materials of the adjoining active layers
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- H—ELECTRICITY
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- 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
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- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/18—Carrier blocking layers
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- 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
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
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- H10K2101/10—Triplet emission
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Abstract
The embodiment of the application discloses a display panel and a display device; the display panel comprises an organic light-emitting function portion, wherein the organic light-emitting function portion comprises a first organic light-emitting unit, a first electron generation layer, a first hole generation layer and a second organic light-emitting unit which are arranged in a stacked mode, a first intermediate layer is arranged between the first electron generation layer and the first hole generation layer, the first light-emitting layer and the second light-emitting layer respectively comprise two light-emitting sub-layers which are arranged in a stacked mode and used for emitting light rays with different colors, the first organic light-emitting unit and the second organic light-emitting unit are arranged into a structure with two light-emitting sub-layers stacked, the structure that the first intermediate layer is arranged between the first electron generation layer and the first hole generation layer is combined, holes and electrons are separated and separated, the injection efficiency of carriers is effectively improved, the driving voltage of the display panel is reduced, the driving voltage during working is also stabilized, and the light-emitting efficiency and the service life of the display panel are improved.
Description
Technical Field
The present disclosure relates to display devices, and particularly to a display panel and a display device.
Background
With the development of display technology, organic Light-Emitting Diode (OLED) display devices have received much attention.
At present, the stacked light emitting device structure is usually adopted to improve the brightness and the service life of the display panel, however, the stacked light emitting device structure is prone to cause the problem of overhigh driving voltage, and meanwhile, the current efficiency of the device is also reduced, so that the service life of the device is limited.
Disclosure of Invention
The embodiment of the application provides a display panel and a display device, and aims to solve the technical problem that a laminated light-emitting device structure easily causes the display panel to have overhigh driving voltage.
The embodiment of the application provides a display panel, including array substrate, first electrode layer and the second electrode layer that stacks gradually the setting and be located first electrode layer with at least one organic light emitting function portion between the second electrode layer, organic light emitting function portion includes:
a first organic light emitting unit disposed on the first electrode layer and including a first light emitting layer;
a first electron generation layer disposed on the first organic light emitting unit;
a first hole generation layer disposed on the first electron generation layer;
a second organic light emitting unit disposed between the first hole generation layer and the second electrode layer, including a second light emitting layer;
the organic light-emitting functional part further comprises a first intermediate layer arranged between the first electron generation layer and the first hole generation layer, the first intermediate layer is used for blocking holes and transmitting electrons, the first light-emitting layer and the second light-emitting layer respectively comprise two light-emitting sub-layers which are arranged in a stacked mode and used for emitting light rays with different colors, and in each light-emitting sub-layer, at least three light-emitting sub-layers are respectively used for emitting light rays with different colors.
In the display panel provided in the embodiment of the present application, the material of the first intermediate layer is selected from one of a metal-based compound, an alkali metal, and an electron transport inorganic compound,
in the display panel provided in the embodiment of the present application, a material of the first interlayer includes lithium amide, lithium fluoride, or an electron-withdrawing compound.
In the display panel provided in the embodiment of the present application, the thickness of the first intermediate layer is 0.1nm to 15nm.
In the display panel provided in the embodiment of the present application, the first light-emitting layer includes a first light-emitting sublayer and a second light-emitting sublayer disposed on a side of the first light-emitting sublayer away from the first electrode layer, and the second light-emitting layer includes a third light-emitting sublayer and a fourth light-emitting sublayer disposed on a side of the third light-emitting sublayer away from the first electrode layer;
the first light-emitting sublayer is used for emitting first color light, the second light-emitting sublayer and the third light-emitting sublayer are used for emitting second color light, and the fourth light-emitting sublayer is used for emitting third color light.
In the display panel provided in the embodiment of the present application, the organic light emitting function portion further includes:
a third organic light emitting unit disposed between the second organic light emitting unit and the second electrode layer;
a second electron generation layer disposed between the second organic light emitting unit and the third organic light emitting unit;
a second hole generation layer disposed between the second electron generation layer and the third organic light emitting unit;
and the second intermediate layer is arranged between the second electron generation layer and the second hole generation layer and is used for blocking holes and transmitting electrons.
In the display panel provided in the embodiment of the present application, a material of the second intermediate layer is selected from one of a metal-based compound, an alkali metal, and an electron transport inorganic compound.
In the display panel provided in the embodiment of the present application, the third organic light emitting unit includes a third light emitting layer, and the fifth light emitting sublayer and the sixth light emitting sublayer are stacked on the third light emitting layer.
In the display panel provided in the embodiment of the present application, the first light-emitting sublayer and the fifth light-emitting sublayer are configured to emit light of a first color, the second light-emitting sublayer and the third light-emitting sublayer are configured to emit light of a second color, and the sixth light-emitting sublayer and the fourth light-emitting sublayer are configured to emit light of a third color.
In the display panel that this application embodiment provided, first colour light is blue light, second colour light is green light, third colour light is red light.
Correspondingly, a display device is further provided, and the display device comprises the display panel according to any one of the previous embodiments.
This application embodiment is through with first organic light emitting unit with the second organic light emitting unit all sets to have the structure that two-layer luminescence sublayer piled up, combines first electron produce the layer with set up the structure of first intermediate level between the first hole produces the layer, just first intermediate level is used for separation hole and transmission electron, carries out separation and separation to hole and electron to effectively improve the injection efficiency of carrier, not only reduced display panel's drive voltage, also stabilized the drive voltage of during operation, improved display panel's luminous efficacy and life.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a first structural schematic diagram of a display panel according to an embodiment of the present disclosure.
Fig. 2 is a schematic view of a second structure of a display panel according to an embodiment of the present disclosure.
Detailed Description
The embodiment of the application provides a display panel and a display device. The following are detailed below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments.
Embodiment 1, referring to fig. 1, an embodiment of the present application provides a display panel, including an array substrate 100, a first electrode layer 200, a second electrode layer 300, and at least one organic light emitting functional portion 400 located between the first electrode layer 200 and the second electrode layer 300, where the organic light emitting functional portion 400 includes:
a first organic light emitting unit 410 disposed on the first electrode layer 200, including a first light emitting layer 411;
a first electron generation layer 420 disposed on the first organic light emitting unit 410;
a first hole generation layer 430 disposed on the first electron generation layer 420;
a second organic light emitting unit 440 disposed between the first hole generation layer 430 and the second electrode layer 300, including a second light emitting layer 441;
the organic light emitting function portion 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 transmitting electrons, the first light emitting layer 411 and the second light emitting layer 441 each include two light emitting sublayers stacked and configured to emit light rays with different colors, and at least three light emitting sublayers in each light emitting sublayer are respectively configured to emit light rays with different colors.
It can be understood that, at present, a light emitting device structure stacked with different colors is generally adopted to improve the brightness and the service life of the display panel, however, the stacked light emitting device structure is prone to have a problem of too high driving voltage, and at the same time, the current efficiency of the device is also reduced, which results in limited improvement of the service life of the device.
It should be noted that, for example, the display panel is a top emission structure, the display panel may further include a pixel defining layer disposed on the array substrate 100 and the first electrode layer 200, the pixel defining layer includes a plurality of pixel openings, the first electrode layer 200 includes a plurality of first electrodes, one of the first electrodes is disposed corresponding to one of the pixel openings, the display panel may include a plurality of organic light emitting functional portions 400, one of the organic light emitting functional portions 400 is disposed corresponding to one of the pixel openings and is located on the first electrode, the second electrode layer 300 is disposed on the pixel defining layer and the organic light emitting functional portions 400, wherein a material of the first electrode layer 200 may include Indium Tin Oxide (ITO) or Indium Zinc Oxide (Indium Zinc Oxide, IZO), specifically, when the material of the first electrode layer 200 is ITO, a layer of silver (Ag) may be disposed between two layers of ITO, and a material of the second electrode layer 300 may be selected from any one of silver alloy, silver, and aluminum alloy.
The display panel further includes a light extraction layer 500 disposed on the second electrode layer 300, and a refractive index of the light extraction layer 500 is greater than 1.8.
In this embodiment, 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 414 stacked on the first electrode layer 200, the first light emitting layer 411 is disposed between the first electron blocking layer 413 and the first hole blocking layer 414, and the first electron generating layer 420 is disposed on a side of the first hole blocking layer 414 away from the first light emitting layer 411; the second organic light emitting unit 440 further includes a second hole injection layer 442, a second electron blocking layer 443, and a second hole blocking layer 444 stacked on the first hole generation layer 430, and 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 414 and the second hole blocking layer 444 employ materials having hole blocking and electron transporting properties, the first hole blocking layer 414 and the second hole blocking layer 444 each have a thickness ranging from 3nm to 8nm, the first electron generation layer 420 may be a complex doped with a metal by an electron transport type material, the first electron generation layer 420 may have a thickness ranging from 8nm to 20nm, the first hole generation layer 430 may be a P-type doped hole transport material, the first hole generation layer 430 may have a thickness ranging from 3nm to 15nm, and particularly, the first hole injection layer 412 may include a hole type dopant, the first electron generation layer 420 may provide electrons to the first light emitting layer 411, the first hole generation layer 430 may provide electrons to the second hole generation layer 430, the second hole generation layer 430 may provide a stable electron injection function to the second hole injection layer 430, and the organic light emitting layer may improve the stability of the organic light emitting display panel, and the organic light emitting layer 400, and the organic light emitting display panel, thereby improving the stability and the stability of the organic light emitting display panel.
In this embodiment, the material of the first intermediate layer 450 is selected from one of a metal-based compound, a basic metal, and an electron-transporting inorganic compound, specifically, the material of the first intermediate layer 450 may be lithium amide, lithium fluoride, or an electron-withdrawing compound, and in this embodiment, the thickness of the first intermediate layer 450 is 0.1nm to 15nm, and it is apparent that when the thickness of the first intermediate layer 450 is less than 0.1nm, an effect of effectively separating holes and electrons is not achieved, and a driving voltage of a display panel is not improved, and when the thickness of the first intermediate layer 450 is greater than 15nm, performance of the organic light-emitting functional portion 400 is easily degraded.
It should be noted that the first light emitting layer 411 and the second light emitting layer 441 each include two stacked light emitting sublayers for emitting light rays with different colors, and among the light emitting sublayers, three light emitting sublayers are respectively used for emitting light rays with different colors, obviously, among the four light emitting sublayers, three light emitting sublayers may be respectively used for emitting blue light rays, green light rays, and red light rays, and another light emitting sublayer may be used for emitting one of the blue light rays, the green light rays, and the red light rays.
In this embodiment, the first light emitting layer 411 includes a first light emitting sub-layer 4111 and a second light emitting sub-layer 4112 disposed on a side of the first light emitting sub-layer 4111 away from the first electrode layer 200, and the second light emitting layer 441 includes a third light emitting sub-layer 4411 and a fourth light emitting sub-layer 4412 disposed on a side of the third light emitting sub-layer 4411 away from the first electrode layer 200;
the first light emitting sub-layer 4111 is configured to emit light of a first color, the second light emitting sub-layer 4112 and the third light emitting sub-layer 4411 are configured to emit light of a second color, and the fourth light emitting sub-layer 4412 is configured to emit light of a third color.
It can be understood that 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 configured according to specific requirements on the basis of being capable of emitting light of a first color, light of a second color and light of a third color, 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 be made of the same material or different doped materials, in this embodiment, the first light emitting sub-layer 4111 is configured to emit light of the first color, the second light emitting sub-layer 4112 and the third light emitting sub-layer 4411 are configured to emit light of the second color, and the fourth light emitting sub-layer 4412 is configured to emit light of the third color, specifically, the first color light may be blue light, the second color light may be green light, and the third color light may be red light, in this case, the material of the first luminescent sublayer 4111 may be a blue fluorescent material, specifically, a Thermally Activated Delayed Fluorescence (TADF) material, a super fluorescent material, or the like, the second luminescent sublayer 4112, the third luminescent sublayer 4411, and the fourth luminescent sublayer 4412 may include at least one of a hole-type Dopant and an electron-type Dopant, and specifically, the second luminescent sublayer 4112, the third luminescent sublayer 4411, and the fourth luminescent sublayer 4412 may employ a Single Host-Host phosphorescent type phosphorescent material or a Pre-mix Host-Host material.
In embodiment 2, with reference to fig. 2, on the basis of the foregoing embodiments, the organic light emitting functional portion 400 further includes:
a third organic light emitting unit 460 disposed between the second organic light emitting unit 440 and the second electrode layer 300;
a second electron generation layer 470 disposed between the second organic light emitting unit 440 and the third organic light emitting unit 460;
a second hole generation layer 480 disposed between the second electron generation layer 470 and the third organic light emitting unit 460;
a second interlayer 490 disposed between the second electron generation layer 470 and the second hole generation layer 480, the second interlayer 490 being used to block holes and transmit electrons. It can be understood that the second electron generation layer 470 is used for providing electrons to the second organic light emitting unit 440, the second hole generation layer 480 is used for providing holes to the third organic light emitting unit 460, and the second intermediate layer 490 is disposed between the second electron generation layer 470 and the second hole generation layer 480, so that the injection efficiency of carriers is effectively improved by blocking and separating holes and electrons, the driving voltage of the display panel is reduced, the driving voltage during operation is also stabilized, and the light emitting efficiency and the service life of the display panel are improved; in this embodiment, the material of the second intermediate layer 490 is selected from one of a metal compound, an alkali metal, and an electron-transporting inorganic compound, and specifically, the material of the second intermediate layer 490 is the same as that of 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, which is not described herein again.
In this embodiment, the third organic light emitting unit 460 includes a third light emitting layer 461, the third light emitting layer 461 is stacked on the fifth light emitting sublayer 4611 and the sixth light emitting sublayer 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 stacked on each other, and the third light emitting layer 461 is disposed between the third electron blocking layer 463 and the third hole blocking layer 464.
It is understood that the third light emitting layer 461 is formed by stacking the fifth light emitting sublayer 4611 and the sixth light emitting sublayer 4612, obviously, the third organic light emitting unit 460 is also a dual light emitting sublayer structure, in this embodiment, the first light emitting sublayer 4111 and the fifth light emitting sublayer 4611 are configured to emit light of a first color, the second light emitting sublayer 4112 and the third light emitting sublayer 4411 are configured to emit light of a second color, and the sixth light emitting sublayer 4612 and the fourth light emitting sublayer 4412 are configured to emit light of a third color, in this embodiment, the light of the first color is blue, the light of the second color is green, and the light of the third color is red, in this case, the materials of the first light emitting sublayer 4111 and the fifth light emitting sublayer 4611 are the same, the materials of the second light emitting sublayer 4112 and the third light emitting sublayer 4411 are the same, and the materials of the sixth light emitting sublayer 4612 and the fourth light emitting sublayer 4412 are the same.
Referring to table 1, it can be understood that the data of performance parameters such as driving voltage, photometric efficiency, current efficiency and lifetime in different comparative examples and examples in table 1 are quantitatively illustrated with reference to the performance parameters in comparative example 2 for comparison with the performance comparative data of example 1, example 2 and comparative device performance data of the present application.
| Performance of | Comparative example 1 | Comparative example 2 | Example 1 | Comparative example 3 | Comparative example 4 | Example 2 |
| Drive voltage (V) | 105.00％ | 100％ | 96.50％ | 186.00％ | 182.00％ | 173.70％ |
| Luminous efficiency (Cd/A) | 92.00％ | 100％ | 105.40％ | 162.00％ | 173.10％ | 179.20％ |
| Current efficiency (EQE) | 91.00％ | 100％ | 104.50％ | 161.00％ | 160.50％ | 167.30％ |
| Life span | 90.00％ | 100％ | 137.00％ | 240.00％ | 268.00％ | 301.40％ |
Table 1 device performance comparison data
It should be noted that comparative example 1 is different from example 1 in that a single light emitting sublayer is used in a light emitting device and the first intermediate layer 450 is absent, and comparative example 2 is different from example 1 in that the first intermediate layer 450 is absent, wherein example 1 is a structure as shown in fig. 1, specifically, the first light emitting sublayer 4111 is used for emitting blue light, the second light emitting sublayer 4112 and the third light emitting sublayer 4411 are used for emitting second green light, and the fourth light emitting sublayer 4412 is used for emitting red light, and it is apparent that comparative example 2 using a double-layered light emitting sublayer structure not only reduces driving voltage but also improves indexes of luminous efficiency, current efficiency (EQE) and lifetime compared with comparative example 1, and example 1 using the first intermediate layer 450 further reduces driving voltage and further improves luminous efficiency, current efficiency and lifetime of the organic light emitting functional portion 400 compared with comparative example 2.
In summary, comparative example 3 differs from example 1 in that a single-layer light emitting sublayer is used in a light emitting device and the first intermediate layer 450 and the second barrier layer are absent, and comparative example 4 differs from example 2 in that the first intermediate layer 450 and the second barrier layer are absent, wherein example 2 is a structure as shown in fig. 2, specifically, the first light emitting sublayer 4111 and the fifth light emitting sublayer 4611 are used to emit blue light, the second light emitting sublayer 4112 and the third light emitting sublayer 4411 are used to emit green light, and the sixth light emitting sublayer 4612 and the fourth light emitting sublayer 4412 are used to emit red light, and it is apparent that, compared to comparative example 3, comparative example 4 using a double-layer light emitting sublayer structure not only reduces driving voltage but also improves luminous efficiency, current efficiency (External quantum efficiency, eqficy) and lifetime index, and compared to comparative example 2 using the first intermediate layer 450 and the second barrier layer further reduces driving voltage and further improves luminous efficiency, current efficiency and lifetime of organic light emitting function 400.
It should be noted that in embodiment 1, 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 may be set according to specific light emitting colors, there are different combinations of 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, and in the structure shown in fig. 1, compared to other combinations emitting different color light, as shown in table 1, in embodiment 1, the first light emitting sub-layer 4111 is used to emit blue light, the second light emitting sub-layer 4112 and the third light emitting sub-layer 4411 are used to emit second green light, and the structure of the fourth light emitting sub-layer 4412 is used to emit red light, and has better performance in terms of driving voltage, luminous efficiency, current efficiency, and lifetime.
Similarly, in embodiment 2, the materials of the first light emitting sub-layer 4111, the second light emitting sub-layer 4112, the third light emitting sub-layer 4411, the fourth light emitting sub-layer 4412, the fifth light emitting sub-layer 4611 and the sixth light emitting sub-layer 4612 may be set according to specific light emitting colors, there are different combinations of the materials of the first light emitting sub-layer 4111, the second light emitting sub-layer 4112, the third light emitting sub-layer 4411, the fourth light emitting sub-layer 4412, the fifth light emitting sub-layer 4611 and the sixth light emitting sub-layer 4612, in the structure shown in fig. 2, compared with other combinations emitting different color light, the structure shown in table 1, embodiment 3, which uses the first light emitting sub-layer 4111 and the fifth light emitting sub-layer 4611 and is used for emitting blue light, the second light emitting sub-layer 4112 and the third light emitting sub-layer 4411 are used for emitting green light, and the structures of the sixth light emitting sub-layer 4612 and the fourth light emitting sub-layer 4412 are used for emitting red, and have better performance indexes of driving voltage, luminous efficiency and lifetime.
Correspondingly, a display device is further provided, and the display device comprises the display panel according to any one of the previous embodiments.
The first organic light emitting unit 410 and the second organic light emitting unit 440 are both arranged to have a structure in which two light emitting sub-layers are stacked, and the first electron generation layer 420 and the first hole generation layer 430 are combined to form the first intermediate layer 450 therebetween, so that holes and electrons are separated, injection efficiency of carriers is effectively improved, driving voltage of the display panel is reduced, driving voltage during operation is stabilized, and luminous efficiency and service life of the display panel are improved.
The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manner and the application scope may be changed, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (11)
1. The utility model provides a display panel which characterized in that, includes the array substrate, first electrode layer and the second electrode layer that stack gradually the setting and is located first electrode layer with at least one organic light emitting function portion between the second electrode layer, organic light emitting function portion includes:
a first organic light emitting unit disposed on the first electrode layer and including a first light emitting layer;
a first electron generation layer disposed on the first organic light emitting unit;
a first hole generation layer disposed on the first electron generation layer;
a second organic light emitting unit disposed between the first hole generation layer and the second electrode layer, including a second light emitting layer;
the organic light-emitting functional part further comprises a first intermediate layer arranged between the first electron generation layer and the first hole generation layer, the first intermediate layer is used for blocking holes and transmitting electrons, the first light-emitting layer and the second light-emitting layer respectively comprise two light-emitting sub-layers which are arranged in a stacked mode and used for emitting light rays with different colors, and in each light-emitting sub-layer, at least three light-emitting sub-layers are respectively used for emitting light rays with different colors.
2. The display panel according to claim 1, wherein the first light-emitting layer comprises a first light-emitting sublayer and a second light-emitting sublayer disposed on a side of the first light-emitting sublayer away from the first electrode layer, and wherein the second light-emitting layer comprises a third light-emitting sublayer and a fourth light-emitting sublayer disposed on a side of the third light-emitting sublayer away from the first electrode layer;
the first light-emitting sublayer is used for emitting light rays with a first color, the second light-emitting sublayer and the third light-emitting sublayer are used for emitting light rays with a second color, and the fourth light-emitting sublayer is used for emitting light rays with a third color.
3. The display panel according to claim 1, wherein a material of the first intermediate layer is one selected from a metal-based compound, an alkali metal, and an electron-transporting inorganic compound.
4. The display panel according to claim 3, wherein a material of the first interlayer comprises lithium amide, lithium fluoride, or an electron-withdrawing compound.
5. The display panel according to claim 1, wherein the thickness of the first intermediate layer is 0.1nm to 15nm.
6. The display panel according to any one of claims 1 to 5, wherein the organic light-emitting function portion further comprises:
a third organic light emitting unit disposed between the second organic light emitting unit and the second electrode layer;
a second electron generation layer disposed between the second organic light emitting unit and the third organic light emitting unit;
a second hole generation layer disposed between the second electron generation layer and the third organic light emitting unit;
and the second intermediate layer is arranged between the second electron generation layer and the second hole generation layer and is used for blocking holes and transmitting electrons.
7. The display panel according to claim 6, wherein a material of the second interlayer is one selected from a metal-based compound, an alkali metal, and an electron-transporting inorganic compound.
8. The display panel according to claim 6, wherein the third organic light emitting unit includes a third light emitting layer, and the fifth light emitting sublayer and the sixth light emitting sublayer are stacked on the third light emitting layer.
9. The display panel of claim 8, wherein the first and fifth luminescent sublayers are configured to emit light of a first color, the second and third luminescent sublayers are configured to emit light of a second color, and the sixth and fourth luminescent sublayers are configured to emit light of a third color.
10. The display panel of claim 2, wherein the first color light is blue light, the second color light is green light, and the third color light is red light.
11. A display device characterized in that it comprises a display panel according to any one of claims 1 to 10.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210774304.8A CN115207239A (en) | 2022-07-01 | 2022-07-01 | Display panel and display device |
| PCT/CN2022/105519 WO2024000662A1 (en) | 2022-07-01 | 2022-07-13 | Display panel and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210774304.8A CN115207239A (en) | 2022-07-01 | 2022-07-01 | Display panel and display device |
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| CN115207239A true CN115207239A (en) | 2022-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210774304.8A Pending CN115207239A (en) | 2022-07-01 | 2022-07-01 | Display panel and display device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115207239A (en) |
| WO (1) | WO2024000662A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024124868A1 (en) * | 2022-12-13 | 2024-06-20 | 武汉华星光电半导体显示技术有限公司 | Display panel and mobile terminal |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101316752B1 (en) * | 2007-05-31 | 2013-10-08 | 삼성디스플레이 주식회사 | White organic light emitting display |
| KR101351410B1 (en) * | 2009-09-29 | 2014-01-14 | 엘지디스플레이 주식회사 | White Organic Light Emitting Device |
| CN103325952A (en) * | 2013-07-04 | 2013-09-25 | 京东方科技集团股份有限公司 | Organic light emitting diode (OLED) device and manufacturing method and display device thereof |
| JP2015156439A (en) * | 2014-02-20 | 2015-08-27 | 株式会社ジャパンディスプレイ | organic EL display device |
| CN109585665A (en) * | 2018-11-30 | 2019-04-05 | 云谷（固安）科技有限公司 | A kind of light-emitting component and display device |
| CN111048675A (en) * | 2019-11-29 | 2020-04-21 | 昆山国显光电有限公司 | Display panel and display device |
| CN114335369B (en) * | 2021-12-29 | 2023-12-01 | 武汉华星光电半导体显示技术有限公司 | Light emitting device and OLED display panel |
-
2022
- 2022-07-01 CN CN202210774304.8A patent/CN115207239A/en active Pending
- 2022-07-13 WO PCT/CN2022/105519 patent/WO2024000662A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024124868A1 (en) * | 2022-12-13 | 2024-06-20 | 武汉华星光电半导体显示技术有限公司 | Display panel and mobile terminal |
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| Publication number | Publication date |
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| WO2024000662A1 (en) | 2024-01-04 |
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