CN112635529A - Display panel, preparation method thereof and display device - Google Patents
Display panel, preparation method thereof and display device Download PDFInfo
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- UHXOHPVVEHBKKT-UHFFFAOYSA-N 1-(2,2-diphenylethenyl)-4-[4-(2,2-diphenylethenyl)phenyl]benzene Chemical compound C=1C=C(C=2C=CC(C=C(C=3C=CC=CC=3)C=3C=CC=CC=3)=CC=2)C=CC=1C=C(C=1C=CC=CC=1)C1=CC=CC=C1 UHXOHPVVEHBKKT-UHFFFAOYSA-N 0.000 claims description 6
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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
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
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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
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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
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/123—Connection of the pixel electrodes to the thin film transistors [TFT]
Abstract
A display panel, a preparation method thereof and a display device are provided, wherein the display panel comprises: the bottom layer pixel unit comprises a first bottom layer sub-pixel and a second bottom layer sub-pixel, and under the same luminance, the service life of the second bottom layer sub-pixel is longer than that of the first bottom layer sub-pixel; the quantum dot pixel unit comprises a first quantum dot sub-pixel and a second quantum dot sub-pixel, wherein the first quantum dot sub-pixel is positioned on one side of the light emitting direction of the first bottom layer sub-pixel, and the second quantum dot sub-pixel is positioned on one side of the light emitting direction of the second bottom layer sub-pixel; when the quantum dot pixel unit emits white light, the light emitting brightness of the second quantum dot sub-pixel in the quantum dot pixel unit is larger than that of the first quantum dot sub-pixel. The display panel reduces a lifetime deviation between the first underlying sub-pixel and the second underlying sub-pixel.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a preparation method thereof and a display device.
Background
An Organic Light-Emitting Diode (OLED) display, also called an Organic electroluminescent display, is a new display. Compared with the existing liquid crystal display, the OLED display has a series of advantages of self-luminescence, wide visual angle, lightness, thinness, high brightness, low power consumption, fast response and the like, so that the OLED display becomes a very popular display product at home and abroad and has wide application prospect. The structure of the OLED display comprises: a substrate; an anode, an organic functional layer, and a cathode stacked on the substrate; and a cover plate encapsulated on the substrate.
Quantum Dot (QD) materials have the advantages of high luminescent color purity, adjustable luminescent wavelength, stable materials and the like, and have significant advantages in the field of pursuing high-color-gamut color display, and the technology of using OLED devices and quantum dots as light color adjustment in academia becomes a research and development hotspot of the current display technology.
However, there is a large lifetime deviation between different regions in current light sources that excite quantum dots to emit light.
Disclosure of Invention
The invention aims to solve the technical problem of how to improve the problem of larger service life deviation between different areas in a light source for exciting quantum dots to emit light in the prior art.
In order to solve the above technical problem, the present invention provides a display panel including: the bottom layer pixel unit comprises a first bottom layer sub-pixel and a second bottom layer sub-pixel, and under the same luminance, the service life of the second bottom layer sub-pixel is longer than that of the first bottom layer sub-pixel; the quantum dot pixel unit comprises a first quantum dot sub-pixel and a second quantum dot sub-pixel, wherein the first quantum dot sub-pixel is positioned on one side of the light emitting direction of the first bottom layer sub-pixel, and the second quantum dot sub-pixel is positioned on one side of the light emitting direction of the second bottom layer sub-pixel; when the quantum dot pixel unit emits white light, the light emitting brightness of the second quantum dot sub-pixel in the quantum dot pixel unit is larger than that of the first quantum dot sub-pixel.
Optionally, the bottom-layer pixel unit further includes a third bottom-layer sub-pixel, and under the same luminance, the lifetime of the third bottom-layer sub-pixel is longer than the lifetime of the first bottom-layer sub-pixel and is less than or equal to the lifetime of the second bottom-layer sub-pixel; the quantum dot pixel unit further comprises a third quantum dot sub-pixel, and the third quantum dot sub-pixel is positioned on one side of the light emergent direction of the third bottom layer sub-pixel; when the quantum dot pixel unit emits white light, the light emitting brightness of the third quantum dot sub-pixel in the quantum dot pixel unit is larger than that of the first quantum dot sub-pixel and smaller than that of the second quantum dot sub-pixel.
Optionally, the bottom layer pixel unit includes an OLED light emitting unit, the first bottom layer sub-pixel includes a first light emitting layer, the second bottom layer sub-pixel includes a second light emitting layer, and the third bottom layer sub-pixel includes a third light emitting layer.
Optionally, the thickness of the third light emitting layer and the thickness of the second light emitting layer are respectively greater than the thickness of the first light emitting layer.
Optionally, the thickness of the second light emitting layer is greater than the thickness of the third light emitting layer.
Optionally, the light-emitting efficiency of the second light-emitting layer and the light-emitting efficiency of the third light-emitting layer are respectively less than the light-emitting efficiency of the first light-emitting layer.
Optionally, under the same luminance, when the lifetime of the third bottom layer sub-pixel is shorter than the lifetime of the second bottom layer sub-pixel, the light emitting efficiency of the second light emitting layer is smaller than the light emitting efficiency of the third light emitting layer, and when the lifetime of the third bottom layer sub-pixel is equal to the lifetime of the second bottom layer sub-pixel, the light emitting efficiency of the second light emitting layer is equal to the light emitting efficiency of the third light emitting layer.
Optionally, the spectrum of light emitted by the first light-emitting layer has a first half-peak width, the spectrum of light emitted by the second light-emitting layer has a second half-peak width, and the spectrum of light emitted by the third light-emitting layer has a third half-peak width; the second half-peak width and the third half-peak width are respectively greater than the first half-peak width.
Optionally, when the light emitting efficiency of the second light emitting layer is less than the light emitting efficiency of the third light emitting layer, and the third half-peak width is less than the second half-peak width; the third half-peak width is equal to the second half-peak width when the light emission efficiency of the second light emitting layer is equal to the light emission efficiency of the third light emitting layer.
Optionally, the second light-emitting layer includes a second fluorescent material, and the second fluorescent material includes triarylamines and derivatives thereof, perylenes and derivatives thereof, anthracenes and derivatives thereof, or alkenes and derivatives thereof.
Optionally, the third light-emitting layer includes a third fluorescent material, and the third fluorescent material includes triarylamines and derivatives thereof, perylenes and derivatives thereof, anthracenes and derivatives thereof, or alkenes and derivatives thereof.
Optionally, the triarylamines and derivatives thereof include DSAPh, DPAVBi, or BczVBi;
the chemical formula of DSAPh is:
DPAVthe chemical formula of Bi is:
the chemical formula of BczVBi is:
optionally, the perylene and derivatives thereof include TBP,
the chemical formula of TBP is:
optionally, the anthracene AND derivatives thereof include AND, TBADN, MADN, DTBADN, TTBADN, alpha-TMADN, beta-TMADN,
the chemical formula of AND is:
the chemical formula of TBADN is:
MADN has the formula:
DTBADN has the chemical formula:
TTBADN has the formula:
α -TMADN has the formula:
the chemical formula of beta-TMADN is:
optionally, the alkenes and derivatives thereof include DPVBi,
the chemical formula of DPVBi is:
optionally, the first light-emitting layer includes a first fluorescent material, and the first fluorescent material includes a boron-nitrogen resonance material, or a boron-nitrogen hetero-condensed ring aromatic hydrocarbon and a derivative thereof.
Optionally, the boron-nitrogen resonance material is v-DABNA;
ν -DABNA has the chemical formula:
optionally, the chemical formula of the boron nitrogen heterocyclic fused ring aromatic hydrocarbon and the derivative thereof is
Wherein X is sulfur or oxygen.
Optionally, the second bottom sub-pixel is of a stacked structure, and/or the third bottom sub-pixel is of a stacked structure; the first bottom sub-pixel is provided with a single-layer first light-emitting layer in the light-emitting direction of the first bottom sub-pixel; when the second bottom layer sub-pixels are of a laminated structure, the second bottom layer sub-pixels are provided with a plurality of second light emitting layers in the light emitting direction of the second bottom layer sub-pixels; when the third bottom sub-pixel is of a laminated structure, the third bottom sub-pixel is provided with a plurality of third light emitting layers in the light emitting direction of the third bottom sub-pixel.
Optionally, when the second bottom sub-pixel and the third bottom sub-pixel are both of a stacked structure, the number of layers of the third light emitting layer is less than that of the second light emitting layer.
Optionally, the bottom layer pixel unit includes a blue bottom layer pixel unit, the first quantum dot sub-pixel includes a blue quantum dot sub-pixel, the second quantum dot sub-pixel includes a green quantum dot sub-pixel, and the third quantum dot sub-pixel layer includes a red quantum dot sub-pixel.
The invention also provides a preparation method of the display panel, which comprises the following steps: forming a bottom layer pixel unit, wherein the bottom layer pixel unit comprises a first bottom layer sub-pixel and a second bottom layer sub-pixel, and the service life of the second bottom layer sub-pixel is longer than that of the first bottom layer sub-pixel under the same luminous brightness; forming a quantum dot pixel unit on one side of the light emergent direction of the bottom layer pixel unit, wherein the quantum dot pixel unit comprises a first quantum dot sub-pixel and a second quantum dot sub-pixel, the first quantum dot sub-pixel is positioned on one side of the light emergent direction of the first bottom layer sub-pixel, and the second quantum dot sub-pixel is positioned on one side of the light emergent direction of the second bottom layer sub-pixel; when the quantum dot pixel unit emits white light, the light emitting brightness of the second quantum dot sub-pixel in the quantum dot pixel unit is larger than that of the first quantum dot sub-pixel.
The invention also provides a display device which is characterized by comprising the display panel.
The technical scheme of the invention has the following advantages:
1. according to the display panel provided by the technical scheme, when the quantum dot pixel unit emits white light, the light-emitting brightness of the second quantum dot sub-pixel in the quantum dot pixel unit is larger than that of the first quantum dot sub-pixel, and correspondingly, when the quantum dot pixel unit emits white light, the light-emitting brightness of the second bottom layer sub-pixel is required to be larger than that of the first bottom layer sub-pixel. Under the same light-emitting brightness, the service life of the second bottom layer sub-pixel is longer than that of the first bottom layer sub-pixel, and the service life of the second bottom layer sub-pixel is sacrificed due to the improvement of the light-emitting brightness of the second bottom layer sub-pixel, so that when the light-emitting brightness of the sub-pixel unit emits white light and the light-emitting brightness of the second bottom layer sub-pixel is larger than that of the first bottom layer sub-pixel, the service loss of the second bottom layer sub-pixel and the service loss of the first bottom layer sub-pixel tend to be consistent, and the service life deviation between the first bottom layer sub-pixel and the second bottom layer sub-pixel is reduced by the display panel.
2. Further, since the light emitting efficiencies of the second light emitting layer and the third light emitting layer are respectively smaller than the light emitting efficiency of the first light emitting layer, under the same light emitting luminance, the lifetimes of the second bottom sub-pixel and the third bottom sub-pixel are respectively longer than the lifetime of the first bottom sub-pixel, accordingly, when the light emitting luminance of the second bottom sub-pixel is larger than the light emitting luminance of the first bottom sub-pixel, the usage loss of the second bottom sub-pixel and the usage loss of the first bottom sub-pixel tend to be consistent, the usage loss of the third bottom sub-pixel and the usage loss of the first bottom sub-pixel tend to be consistent, and the display panel reduces the lifetime deviation between the first bottom sub-pixel and the second bottom sub-pixel, lifetime deviation between the first underlying sub-pixel and the third underlying sub-pixel is reduced.
Further, the spectrum of light emitted by the first light-emitting layer has a first half-peak width, the spectrum of light emitted by the second light-emitting layer has a second half-peak width, and the spectrum of light emitted by the third light-emitting layer has a third half-peak width; when the light emitting efficiencies of the second light emitting layer and the third light emitting layer are respectively smaller than the light emitting efficiency of the first light emitting layer, the second half-peak width and the third half-peak width are respectively selected to be larger than the first half-peak width, so that under the corresponding relation, the material selection ranges of the second light emitting layer, the third light emitting layer and the first light emitting layer are larger, the preparation of the second light emitting layer, the third light emitting layer and the first light emitting layer has mature process lines, and the requirement of mass production is met.
3. Further, the second bottom layer sub-pixel is of a laminated structure, and/or the third bottom layer sub-pixel is of a laminated structure; the first bottom sub-pixel is provided with a single-layer first light-emitting layer in the light-emitting direction of the first bottom sub-pixel; when the second bottom layer sub-pixels are of a laminated structure, the second bottom layer sub-pixels are provided with a plurality of second light emitting layers in the light emitting direction of the second bottom layer sub-pixels; when the third bottom sub-pixel is of a laminated structure, the third bottom sub-pixel is provided with a plurality of third light emitting layers in the light emitting direction of the third bottom sub-pixel. Under the same light emitting brightness, compared with the case that the second bottom layer sub-pixel is provided with a plurality of second light emitting layers in the light emitting direction of the second bottom layer sub-pixel, the current density in the second bottom layer sub-pixel tends to be linearly reduced along with the increase of the number of the second light emitting layers, and even if the voltage applied to the second bottom layer sub-pixel is properly increased, the power consumption of the second bottom layer sub-pixel is reduced. Accordingly, for similar reasons, when the third underlying sub-pixel has a stacked structure, the power consumption of the third underlying sub-pixel may be reduced.
4. The display device provided by the technical scheme of the invention comprises the display panel, and the service life deviation between the first bottom layer sub-pixel and the second bottom layer sub-pixel in the display device is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating a process for fabricating a display panel according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a display panel according to another embodiment of the invention.
Detailed Description
As described in the background, the prior art light source for exciting the quantum dots to emit light has a large lifetime deviation between different regions.
Researches show that the quantum dot pixel unit generally comprises a red light quantum dot sub-pixel, a green light quantum dot sub-pixel and a blue light quantum dot sub-pixel, and a blue light source is generally adopted as a light source for exciting the quantum dots to emit light. In the using process of the device, when the quantum dot pixel unit emits white light, the brightness of light required to be emitted by the red light quantum dot sub-pixel, the green light quantum dot sub-pixel and the blue light quantum dot sub-pixel is inconsistent, particularly, the difference between the brightness of light required to be emitted by the green light quantum dot sub-pixel and the brightness of light required to be emitted by the blue light quantum dot sub-pixel is large, correspondingly, when the quantum dot pixel unit emits white light, the light sources corresponding to different quantum dot sub-pixels are excited to emit blue light with different brightness, so that the service life loss of the light sources corresponding to different quantum dot sub-pixels is asynchronous, and the service life deviation of the light sources in different areas is caused.
On this basis, an embodiment of the present invention provides a display panel, including: the bottom layer pixel unit comprises a first bottom layer sub-pixel and a second bottom layer sub-pixel, and under the same luminance, the service life of the second bottom layer sub-pixel is longer than that of the first bottom layer sub-pixel; the quantum dot pixel unit comprises a first quantum dot sub-pixel and a second quantum dot sub-pixel, wherein the first quantum dot sub-pixel is positioned on one side of the light emitting direction of the first bottom layer sub-pixel, and the second quantum dot sub-pixel is positioned on one side of the light emitting direction of the second bottom layer sub-pixel; when the quantum dot pixel unit emits white light, the light emitting brightness of the second quantum dot sub-pixel in the quantum dot pixel unit is larger than that of the first quantum dot sub-pixel.
The following structural drawings explain embodiments of the present invention in detail.
An embodiment of the present invention provides a display panel, referring to fig. 1, including:
the bottom layer pixel unit 10 comprises a first bottom layer sub-pixel A and a second bottom layer sub-pixel B, and under the same light emitting brightness, the service life of the second bottom layer sub-pixel B is longer than that of the first bottom layer sub-pixel A;
the quantum dot pixel unit 120 comprises a first quantum dot sub-pixel 121 and a second quantum dot sub-pixel 122, wherein the first quantum dot sub-pixel 121 is positioned on one side of the light emergent direction of the first bottom layer sub-pixel A, and the second quantum dot sub-pixel 122 is positioned on one side of the light emergent direction of the second bottom layer sub-pixel B;
when the quantum dot pixel unit 120 emits white light, the light emission luminance of the second quantum dot sub-pixel layer 122 in the quantum dot pixel unit 120 is greater than the light emission luminance of the first quantum dot sub-pixel layer 121.
In this embodiment, when the quantum dot pixel unit 120 emits white light, the light-emitting luminance of the second quantum dot sub-pixel 122 in the quantum dot pixel unit 120 is greater than the light-emitting luminance of the first quantum dot sub-pixel 121, and correspondingly, when the quantum dot pixel layer 120 emits white light, the light-emitting luminance of the second bottom-layer sub-pixel B needs to be greater than the light-emitting luminance of the first bottom-layer sub-pixel a. Under the same light-emitting brightness, the service life of the second bottom-layer sub-pixel B is longer than that of the first bottom-layer sub-pixel A, and the service life of the second bottom-layer sub-pixel B is sacrificed by the improvement of the light-emitting brightness of the second bottom-layer sub-pixel B, so that when the sub-dot pixel unit 120 emits white light and the light-emitting brightness of the second bottom-layer sub-pixel B is larger than that of the first bottom-layer sub-pixel A, the service loss of the second bottom-layer sub-pixel B and the service loss of the first bottom-layer sub-pixel A tend to be consistent, and the display panel reduces the service life deviation between the first bottom-layer sub-pixel A and the second bottom-layer sub-pixel B.
The bottom layer pixel unit 10 further includes a third bottom layer sub-pixel C, and under the same luminance, the lifetime of the third bottom layer sub-pixel C is longer than that of the first bottom layer sub-pixel a and is less than or equal to that of the second bottom layer sub-pixel B.
Correspondingly, the quantum dot pixel unit 120 further includes a third quantum dot sub-pixel 123, where the third quantum dot sub-pixel 123 is located on one side of the light emitting direction of the third bottom sub-pixel C; when the quantum dot pixel unit 120 emits white light, the light emission luminance of the third quantum dot subpixel 123 in the quantum dot pixel unit 120 is greater than the light emission luminance of the first quantum dot subpixel 121 and less than the light emission luminance of the second quantum dot subpixel 122.
When the quantum dot pixel unit 120 emits white light, the light-emitting luminance of the third quantum dot subpixel 123 in the quantum dot pixel unit 120 is greater than the light-emitting luminance of the first quantum dot subpixel 121, and correspondingly, the light-emitting luminance of the third bottom layer subpixel C is required to be greater than the light-emitting luminance of the first bottom layer subpixel a when the quantum dot pixel unit 120 emits white light. Under the same light-emitting brightness, the service life of the third bottom layer sub-pixel C is longer than that of the first bottom layer sub-pixel a, and the life of the third bottom layer sub-pixel C is sacrificed by the improvement of the light-emitting brightness of the third bottom layer sub-pixel C, so that the equivalent sub-point pixel unit 120 emits white light, and when the light-emitting brightness of the third bottom layer sub-pixel C is larger than that of the first bottom layer sub-pixel a, the service loss of the third bottom layer sub-pixel C and the service loss of the first bottom layer sub-pixel a tend to be consistent, and the display panel reduces the difference in service life between the first bottom layer sub-pixel a and the second bottom layer sub-pixel B.
In this embodiment, under the same luminance, the lifetime of the third bottom sub-pixel C is longer than the lifetime of the first bottom sub-pixel a and shorter than the lifetime of the second bottom sub-pixel B.
When the quantum dot pixel unit 120 emits white light, the light-emitting luminance of the third quantum dot subpixel 123 in the quantum dot pixel unit 120 is smaller than the light-emitting luminance of the second quantum dot subpixel 122, and correspondingly, the light-emitting luminance of the third bottom layer subpixel C is required to be smaller than the light-emitting luminance of the second bottom layer subpixel B when the quantum dot pixel unit 120 emits white light. Under the same light-emitting brightness, the service life of the second bottom-layer sub-pixel B is longer than that of the third bottom-layer sub-pixel C, and the service life of the second bottom-layer sub-pixel B is sacrificed by the improvement of the light-emitting brightness of the second bottom-layer sub-pixel B, so that when the sub-dot pixel unit 120 emits white light and the light-emitting brightness of the third bottom-layer sub-pixel C is smaller than that of the second bottom-layer sub-pixel B, the service loss of the third bottom-layer sub-pixel C and the service loss of the second bottom-layer sub-pixel B tend to be consistent, and the display panel reduces the service life deviation between the third bottom-layer sub-pixel C and the second bottom-layer sub-pixel B.
In one embodiment, the underlying pixel cell 10 comprises a blue underlying pixel cell, the first quantum dot subpixel 121 comprises a blue quantum dot subpixel layer, the second quantum dot subpixel 122 comprises a green quantum dot subpixel layer, and the third quantum dot subpixel 123 comprises a red quantum dot subpixel layer.
The bottom layer pixel cell 10 includes an OLED light emitting cell. In this embodiment, the bottom layer pixel unit 10 is taken as an OLED light emitting unit for illustration. The first underlying subpixel a includes a first light emitting layer 131, the second underlying subpixel B includes a second light emitting layer 132, and the third underlying subpixel C includes a third light emitting layer 133.
Specifically, the bottom layer pixel unit 10 includes: a substrate 100; a pixel defining layer 110 on one side of the substrate 100, the pixel defining layer 110 having a first sub-pixel opening, a second sub-pixel opening, and a third sub-pixel opening therein; the first light emitting layer 131 is located in the first sub-pixel opening, the second light emitting layer 132 is located in the second sub-pixel opening, and the third light emitting layer 133 is located in the third sub-pixel opening. The surface of the substrate 100 at the bottom of the first light emitting layer 131 is provided with a first anode layer, the surface of the substrate 100 at the bottom of the second light emitting layer 132 is provided with a second anode layer, and the surface of the substrate 100 at the bottom of the third light emitting layer 133 is provided with a third anode layer.
It should be noted that, in this embodiment, the method further includes: the bottom organic functional layer 161 is positioned on the inner walls of the first sub-pixel opening, the second sub-pixel opening and the third sub-pixel opening and the surface of the pixel limiting layer 110 opposite to the substrate 100, and the bottom organic functional layer 161 comprises any one or more of a hole injection layer, a hole transport layer and an electron blocking layer; the top organic functional layer 162 is positioned on the surface of one side, back to the substrate 100, of the bottom organic functional layer 161, the first light emitting layer 131, the second light emitting layer 132 and the third light emitting layer 133, and the top organic functional layer 162 comprises any one or more of a hole blocking layer, an electron transport layer and an electron injection layer; a cathode layer 163 positioned on the surface of the top organic functional layer 162 facing away from the substrate 100; and the packaging thin film layer 140 is positioned on one side of the cathode layer 163, which faces away from the substrate 100, and the packaging thin film layer 140 comprises a plurality of planarization layers, wherein the planarization layers are organic thin film layers and/or inorganic thin film layers. In this embodiment, the bottom organic functional layer is disposed on the whole surface, and the top organic functional layer is disposed on the whole surface.
In this embodiment, the substrate 100 is an array substrate, and the array substrate includes: the display panel comprises a substrate base plate and an array circuit layer positioned on the substrate base plate, wherein a first anode layer, a second anode layer and a third anode layer are electrically connected with the array circuit layer, and the display panel is an AMOLED (Active-matrix organic lighting diode) type display panel.
In other embodiments, the display panel is a PMOLED (Passive-matrix organic lighting diode) type display panel.
In this embodiment, the quantum dot pixel unit 120 is located on a side of the encapsulation film layer 140 facing away from the substrate 100.
In the present embodiment, the light emitting efficiency of the second light emitting layer 132 and the light emitting efficiency of the third light emitting layer 133 are respectively smaller than the light emitting efficiency of the first light emitting layer 131.
Since the light emitting efficiencies of the second light emitting layer 132 and the third light emitting layer 133 are respectively smaller than the light emitting efficiency of the first light emitting layer 131, under the same light emitting luminance, the lifetimes of the second bottom sub-pixel B and the third bottom sub-pixel C are respectively longer than the lifetime of the first bottom sub-pixel a, accordingly, when the equivalent sub-dot pixel unit 120 emits white light, and the light emitting luminance of the second bottom sub-pixel B is larger than the light emitting luminance of the first bottom sub-pixel a, the usage loss of the second bottom sub-pixel B and the usage loss energy of the first bottom sub-pixel a tend to be consistent, and when the equivalent sub-dot pixel unit 120 emits white light, and the light emitting luminance of the third bottom sub-pixel C is larger than the light emitting luminance of the first bottom sub-pixel a, the usage loss of the third bottom sub-pixel C and the usage loss energy of the first bottom sub-pixel a tend to be consistent.
Further, when the lifetime of the third bottom sub-pixel C is shorter than that of the second bottom sub-pixel B at the same luminance, the light emitting efficiency of the second light emitting layer 132 is smaller than that of the third light emitting layer 133.
In other embodiments, when the lifetime of the third bottom sub-pixel C is equal to the lifetime of the second bottom sub-pixel B at the same light emission luminance, the light emission efficiency of the second light-emitting layer 132 is equal to the light emission efficiency of the third light-emitting layer 133.
In one embodiment, the spectrum of light emitted from the first light emitting layer 131 has a first half-peak width, the spectrum of light emitted from the second light emitting layer 132 has a second half-peak width, and the spectrum of light emitted from the third light emitting layer 133 has a third half-peak width, and the second half-peak width and the third half-peak width are respectively greater than the first half-peak width.
When the light emitting efficiencies of the second light emitting layer 132 and the third light emitting layer 133 are respectively less than the light emitting efficiency of the first light emitting layer 131, the second half-peak width and the third half-peak width are respectively selected to be greater than the first half-peak width, so that under the corresponding relationship, the material selection ranges of the second light emitting layer 132, the third light emitting layer 133 and the first light emitting layer 131 are larger, the preparation of the second light emitting layer 132, the third light emitting layer 133 and the first light emitting layer 131 has a mature process line, and the requirement of mass production is met.
In one embodiment, the second light emitting layer 132 has a light emitting efficiency less than that of the third light emitting layer 133, and the third half-peak width is less than the second half-peak width.
In another embodiment, when the light emitting efficiency of the second light emitting layer 132 is equal to the light emitting efficiency of the third light emitting layer 133, the third half-peak width is equal to the second half-peak width, and the material of the second light emitting layer 132 and the material of the third light emitting layer 133 may be selected to be the same material.
The second light-emitting layer 132 includes a second host material and a second fluorescent material, and the second fluorescent material includes triarylamines and derivatives thereof, perylenes and derivatives thereof, anthracenes and derivatives thereof, or alkenes and derivatives thereof.
The third light-emitting layer 133 includes a third main material and a third fluorescent material, and the third fluorescent material includes triarylamines and derivatives thereof, perylenes and derivatives thereof, anthracenes and derivatives thereof, or alkenes and derivatives thereof.
The triarylamines and derivatives thereof include DSAPh, DPAVBi or BczVBi.
The chemical formula of DSAPh is:
the chemical formula of DPAVBi is:
the chemical formula of BczVBi is:
the perylene and derivatives thereof include TBP. The chemical formula of TBP is:
the anthracene AND its derivative include AND, TBADN, MADN, DTBADN, TTBADN, alpha-TMADN, AND beta-TMADN.
The chemical formula of AND is:
the chemical formula of TBADN is:
MADN has the formula:
DTBADN has the chemical formula:
TTBADN has the formula:
α -TMADN has the formula:
the chemical formula of beta-TMADN is:
the alkenes and derivatives thereof include DPVBi.
The chemical formula of DPVBi is:
the first light-emitting layer comprises a first main body material and a first fluorescent material, and the first fluorescent material comprises a boron-nitrogen resonance material or boron-nitrogen hetero-condensed ring aromatic hydrocarbon and derivatives thereof.
The boron-nitrogen resonance material is v-DABNA.
ν -DABNA has the chemical formula:
the chemical formula of the boron nitrogen heterocyclic fused ring aromatic hydrocarbon and the derivative thereof is shown as
Or
Wherein X is sulfur or oxygen.
The thickness of the third light emitting layer 133 is greater than the thickness of the first light emitting layer 131 and less than or equal to the thickness of the second light emitting layer 132. Therefore, under the same light-emitting brightness, the service life of the third bottom layer sub-pixel is longer than that of the first bottom layer sub-pixel, the difference between the service life of the third bottom layer sub-pixel and the service life of the first bottom layer sub-pixel is further increased, and the service life of the second bottom layer sub-pixel is longer than that of the first bottom layer sub-pixel, and the difference between the service life of the second bottom layer sub-pixel and the first bottom layer sub-pixel is further. When the thickness of the third light emitting layer 133 is smaller than that of the second light emitting layer 132, the lifetime of the second underlying sub-pixel is longer than that of the third underlying sub-pixel at the same light emission luminance and the difference therebetween is further increased.
In other embodiments, the thickness of each third light emitting layer, the thickness of each first light emitting layer, and the thickness of each second light emitting layer are equal. Alternatively, the thickness of each third light-emitting layer, the thickness of each first light-emitting layer, and the thickness of each second light-emitting layer are selected in other magnitude relationships.
Accordingly, another embodiment of the present invention further provides a method for manufacturing a display panel, referring to fig. 2, including:
s01: forming a bottom layer pixel unit, wherein the bottom layer pixel unit comprises a first bottom layer sub-pixel and a second bottom layer sub-pixel, and the service life of the second bottom layer sub-pixel is longer than that of the first bottom layer sub-pixel under the same luminous brightness;
s02: forming a quantum dot pixel unit on one side of the light emergent direction of the bottom layer pixel unit, wherein the quantum dot pixel unit comprises a first quantum dot sub-pixel and a second quantum dot sub-pixel, the first quantum dot sub-pixel is positioned on one side of the light emergent direction of the first bottom layer sub-pixel, and the second quantum dot sub-pixel is positioned on one side of the light emergent direction of the second bottom layer sub-pixel; when the quantum dot pixel unit emits white light, the light emitting brightness of the second quantum dot sub-pixel in the quantum dot pixel unit is larger than that of the first quantum dot sub-pixel.
The bottom layer pixel unit further comprises a third bottom layer sub-pixel, and under the same light-emitting brightness, the service life of the third bottom layer sub-pixel is longer than that of the first bottom layer sub-pixel and is less than or equal to that of the second bottom layer sub-pixel.
The quantum dot pixel unit further comprises a third quantum dot sub-pixel, and the third quantum dot sub-pixel is positioned on one side of the light emergent direction of the third bottom layer sub-pixel; when the quantum dot pixel unit emits white light, the light emitting brightness of the third quantum dot sub-pixel in the quantum dot pixel unit is larger than that of the first quantum dot sub-pixel and smaller than that of the second quantum dot sub-pixel.
The description of the underlying pixel cell refers to the foregoing embodiments and is not described in detail.
The description of the quantum dot pixel layer refers to the foregoing embodiments and is not described in detail.
Accordingly, another embodiment of the present invention further provides a display panel, and referring to fig. 3, the display panel of the present embodiment is different from the display panel of the previous embodiment in that: the second bottom sub-pixel B1 in the bottom pixel unit 10a is of a stacked structure, and the third bottom sub-pixel C1 in the bottom pixel unit 10a is of a stacked structure; the first underlying sub-pixel a1 in the underlying pixel unit 10a has a single layer of the first light emitting layer 131a in the light emitting direction of the first underlying sub-pixel a 1.
When the second bottom sub-pixel B1 is a stacked structure, the second bottom sub-pixel B1 is provided with a plurality of second light-emitting layers 132a in the light-emitting direction of the second bottom sub-pixel B1.
When the third bottom sub-pixel C1 has a stacked structure, the third bottom sub-pixel C1 has a plurality of third light-emitting layers 133a in the light-emitting direction of the third bottom sub-pixel C1.
When the second bottom sub-pixel B1 and the third bottom sub-pixel C1 are both stacked, the number of layers of the third light-emitting layer 133a is less than that of the second light-emitting layer 132 a.
In other embodiments, when the second bottom sub-pixel B1 and the third bottom sub-pixel C1 are both of a stacked structure, the number of the third light-emitting layers 133a is equal to the number of the second light-emitting layers 132a, and thus, the light-emitting efficiency of the second light-emitting layers 132a needs to be set to be less than the light-emitting efficiency of the third light-emitting layers 133 a.
In one embodiment, the thickness of each third light emitting layer is greater than the thickness of the first light emitting layer and less than or equal to the thickness of each second light emitting layer. In other embodiments, the thickness of each third light emitting layer, the thickness of each first light emitting layer, and the thickness of each second light emitting layer are equal. Alternatively, the thickness of each third light-emitting layer, the thickness of each first light-emitting layer, and the thickness of each second light-emitting layer are selected in other magnitude relationships.
In this embodiment, the first bottom sub-pixel a1 includes a first bottom organic functional layer (not labeled), a first light emitting layer 131a, and a first top organic functional layer (not labeled) stacked in sequence from bottom to top. The first bottom organic functional layer comprises any one or more of a first hole injection layer, a first hole transport layer and a first electron blocking layer, and the first top organic functional layer comprises any one or more of a first hole blocking layer, a first electron transport layer and a first electron injection layer.
When the second bottom sub-pixel B1 has a stacked structure, a second charge generation layer is disposed between adjacent second light-emitting layers 132 a. The second charge generation layer includes a second N-type charge generation layer and a second P-type charge generation layer. Taking the number of the second light emitting layers in the second bottom sub-pixel B1 as 3, the second bottom sub-pixel B1 includes a first bottom organic functional layer (not labeled), a second light emitting layer, a second top organic functional layer (not labeled), a second charge generating layer (not labeled), a second bottom organic functional layer (not labeled), a second light emitting layer, and a second top organic functional layer (not labeled). The second bottom organic functional layer comprises any one or more of a second hole injection layer, a second hole transport layer and a second electron blocking layer, and the second top organic functional layer comprises any one or more of a second hole blocking layer, a second electron transport layer and a second electron injection layer.
In addition, when the third bottom sub-pixel C1 has a stacked structure, a third charge generation layer is disposed between adjacent third light-emitting layers 133 a. The third charge generation layer includes a third N-type charge generation layer and a third P-type charge generation layer. Taking the number of the third light emitting layers in the third bottom sub-pixel C1 as 2, the third bottom sub-pixel C1 includes a first third bottom organic functional layer (not labeled), a first third light emitting layer, a first third top organic functional layer (not labeled), a first third charge generating layer (not labeled), a second third bottom organic functional layer (not labeled), a second third light emitting layer, and a second third top organic functional layer (not labeled). The third bottom organic functional layer comprises any one or more of a third hole injection layer, a third hole transport layer and a third electron blocking layer, and the third top organic functional layer comprises any one or more of a third hole blocking layer, a third electron transport layer and a third electron injection layer.
The first bottom organic functional layer, the second bottom organic functional layer of the first layer and the third bottom organic functional layer of the first layer are arranged in a coplanar manner. The first top organic functional layer, the second top organic functional layer of the first layer and the third top organic functional layer of the first layer are arranged in a coplanar manner. The second charge generation layer of the first layer and the third charge generation layer of the first layer are disposed in the same layer and connected together. The second bottom organic functional layer of the second layer and the third bottom organic functional layer of the second layer are arranged in the same layer and connected together. The second top organic functional layer of the second layer and the third top organic functional layer of the second layer are arranged in the same layer and connected together.
Under the same light emitting brightness, compared with the case that the second bottom layer sub-pixel is provided with a plurality of second light emitting layers in the light emitting direction of the second bottom layer sub-pixel, the current density in the second bottom layer sub-pixel tends to be linearly reduced along with the increase of the number of the second light emitting layers, and even if the voltage applied to the second bottom layer sub-pixel is properly increased, the power consumption of the second bottom layer sub-pixel is reduced. Accordingly, for similar reasons, when the third underlying sub-pixel has a stacked structure, the power consumption of the third underlying sub-pixel may be reduced.
In the present embodiment, the description of the lifetime of the second bottom sub-pixel B1, the third bottom sub-pixel C1, and the first sub-pixel a1 in the bottom pixel unit 10a refers to the content of the foregoing embodiments, and will not be described in detail.
The manufacturing method of the display panel in fig. 3 is different from the manufacturing method of the display panel of the previous embodiment in that: the underlying pixel cell 10a is formed differently from the previous embodiment, and reference to the foregoing regarding the specific underlying pixel cell 10a will not be described in detail. The manufacturing method of the display panel in this embodiment is the same as that of the display panel in the previous embodiment, and is not described in detail.
It should be noted that, taking the number of layers of the second light emitting layer in the second bottom sub-pixel B1 as an example, the number of layers of the third light emitting layer in the third bottom sub-pixel C1 as an example, and the number of layers of the first light emitting layer in the first bottom sub-pixel a1 as an example, the first bottom organic functional layer, the second bottom organic functional layer of the first layer, and the third bottom organic functional layer of the first layer are simultaneously formed in the same process, the first top organic functional layer, the second top organic functional layer of the first layer, and the third top organic functional layer of the first layer are simultaneously formed in the same process, the second charge generation layer of the first layer and the third charge generation layer of the first layer are simultaneously formed in the same process, the second bottom organic functional layer of the second layer, and the third bottom organic functional layer of the second layer are simultaneously formed in the same process, the second top organic functional layer of the second layer and the third top organic functional layer of the second layer are formed simultaneously in the same process.
Accordingly, another embodiment of the present invention further provides a display panel, where the display panel of this embodiment is different from the display panel of the previous embodiment in that: the second bottom sub-pixel in the bottom pixel unit is of a laminated structure, the third bottom sub-pixel in the bottom pixel unit is provided with a single-layer third light-emitting layer in the light-emitting direction of the third bottom sub-pixel, and the first bottom sub-pixel in the bottom pixel unit is provided with a single-layer first light-emitting layer in the light-emitting direction of the first bottom sub-pixel.
In one embodiment, the second light emitting layer and the first light emitting layer are the same material.
In another embodiment, the materials of the second light-emitting layer and the first light-emitting layer are different, and in particular, the materials of the second light-emitting layer and the first light-emitting layer are selected according to the contents of the detailed embodiments.
In this embodiment, the light-emitting efficiency of the third light-emitting layer is smaller than that of the first light-emitting layer, and the materials of the third light-emitting layer and the first light-emitting layer are selected as described in the foregoing embodiments.
In this embodiment, the description of the lifetimes of the second bottom sub-pixel, the third bottom sub-pixel, and the first bottom sub-pixel in the bottom pixel unit refers to the foregoing embodiments and will not be described in detail.
In one embodiment, the thickness of each third light emitting layer is greater than the thickness of the first light emitting layer and less than or equal to the thickness of each second light emitting layer. In other embodiments, the thickness of each third light emitting layer, the thickness of each first light emitting layer, and the thickness of each second light emitting layer are equal. Alternatively, the thickness of each third light-emitting layer, the thickness of each first light-emitting layer, and the thickness of each second light-emitting layer are selected in other magnitude relationships.
The first underlying sub-pixel and the second underlying sub-pixel of the present embodiment refer to the contents of the foregoing embodiments. The third bottom layer sub-pixel of the present embodiment includes a third bottom layer organic functional layer, a third light emitting layer, and a third top layer organic functional layer, which are sequentially stacked from bottom to top. The first bottom organic functional layer, the second bottom organic functional layer of the first layer and the third bottom organic functional layer are arranged in a coplanar manner. The first top organic functional layer, the second top organic functional layer of the first layer and the third top organic functional layer are arranged in a coplanar manner.
The same portions of this embodiment as those of the previous embodiment will not be described in detail.
Accordingly, another embodiment of the present invention further provides a method for manufacturing a display panel, where the method for manufacturing a display panel of this embodiment is different from the method for manufacturing a display panel of the previous embodiment in that: the formed bottom layer pixel units are different, a second bottom layer sub-pixel in the bottom layer pixel unit is of a laminated structure, a third bottom layer sub-pixel in the bottom layer pixel unit is provided with a single-layer third light emitting layer in the light emitting direction of the third bottom layer sub-pixel, and a first bottom layer sub-pixel in the bottom layer pixel unit is provided with a single-layer first light emitting layer in the light emitting direction of the first bottom layer sub-pixel. The manufacturing method of the display panel in this embodiment is the same as that of the display panel in the previous embodiment, and is not described in detail.
It should be noted that the first bottom organic functional layer, the first second bottom organic functional layer, and the third bottom organic functional layer are formed simultaneously in the same process, and the first top organic functional layer, the first second top organic functional layer, and the third top organic functional layer are formed simultaneously in the same process.
Accordingly, another embodiment of the present invention further provides a display panel, wherein the display panel of the present embodiment is different from the display panel of the previous embodiment in that: the third bottom sub-pixel in the bottom pixel unit is of a laminated structure, the second bottom sub-pixel in the bottom pixel unit is provided with a single-layer second light-emitting layer in the light-emitting direction of the second bottom sub-pixel, and the first bottom sub-pixel in the bottom pixel unit is provided with a single-layer first light-emitting layer in the light-emitting direction of the first bottom sub-pixel.
In one embodiment, the material of the third light emitting layer and the first light emitting layer is the same.
In another embodiment, the materials of the third light-emitting layer and the first light-emitting layer are different, and in particular, the materials of the third light-emitting layer and the first light-emitting layer are selected according to the contents of the detailed embodiments.
In this embodiment, the light emitting efficiency of the second light emitting layer is smaller than that of the first light emitting layer, and the materials of the second light emitting layer and the first light emitting layer are selected as described in the foregoing embodiments.
In this embodiment, the description of the lifetimes of the second bottom sub-pixel, the third bottom sub-pixel, and the first bottom sub-pixel in the bottom pixel unit refers to the foregoing embodiments and will not be described in detail.
The first bottom sub-pixel of this embodiment refers to the contents of the previous embodiments. The second bottom layer sub-pixel of this embodiment includes a second bottom layer organic functional layer, a second light emitting layer, and a second top layer organic functional layer, which are sequentially stacked from bottom to top. The third underlying subpixel of the present embodiment refers to the description of the third underlying subpixel C1. The first bottom organic functional layer, the second bottom organic functional layer and the third bottom organic functional layer of the first layer are arranged in a coplanar manner. The first top organic functional layer, the second top organic functional layer and the third top organic functional layer of the first layer are arranged in a coplanar manner.
The same portions of this embodiment as those of the previous embodiment will not be described in detail.
Accordingly, another embodiment of the present invention further provides a method for manufacturing a display panel, where the method for manufacturing a display panel of this embodiment is different from the method for manufacturing a display panel of the previous embodiment in that: the formed bottom layer pixel units are different, a third bottom layer sub-pixel in the bottom layer pixel unit is of a laminated structure, a second bottom layer sub-pixel in the bottom layer pixel unit is provided with a single-layer second light emitting layer in the light emitting direction of the second bottom layer sub-pixel, and a first bottom layer sub-pixel in the bottom layer pixel unit is provided with a single-layer first light emitting layer in the light emitting direction of the first bottom layer sub-pixel.
It should be noted that the first bottom organic functional layer, the second bottom organic functional layer, and the third bottom organic functional layer of the first layer are formed simultaneously in the same process, and the first top organic functional layer, the second top organic functional layer, and the third top organic functional layer of the first layer are formed simultaneously in the same process.
The manufacturing method of the display panel in this embodiment is the same as that of the display panel in the previous embodiment, and is not described in detail.
Correspondingly, another embodiment of the present invention further provides a display device, including the display panel described above.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A display panel, comprising:
the bottom layer pixel unit comprises a first bottom layer sub-pixel and a second bottom layer sub-pixel, and under the same luminance, the service life of the second bottom layer sub-pixel is longer than that of the first bottom layer sub-pixel;
the quantum dot pixel unit comprises a first quantum dot sub-pixel and a second quantum dot sub-pixel, wherein the first quantum dot sub-pixel is positioned on one side of the light emitting direction of the first bottom layer sub-pixel, and the second quantum dot sub-pixel is positioned on one side of the light emitting direction of the second bottom layer sub-pixel;
when the quantum dot pixel unit emits white light, the light emitting brightness of the second quantum dot sub-pixel in the quantum dot pixel unit is larger than that of the first quantum dot sub-pixel.
2. The display panel of claim 1, wherein the bottom layer pixel unit further comprises a third bottom layer sub-pixel, and under the same luminance, the lifetime of the third bottom layer sub-pixel is longer than that of the first bottom layer sub-pixel and shorter than or equal to that of the second bottom layer sub-pixel;
the quantum dot pixel unit further comprises a third quantum dot sub-pixel, and the third quantum dot sub-pixel is positioned on one side of the light emergent direction of the third bottom layer sub-pixel;
when the quantum dot pixel unit emits white light, the light emitting brightness of the third quantum dot sub-pixel in the quantum dot pixel unit is larger than that of the first quantum dot sub-pixel and smaller than that of the second quantum dot sub-pixel.
3. The display panel of claim 2, wherein the bottom layer pixel unit comprises an OLED light emitting unit, the first bottom layer sub-pixel comprises a first light emitting layer, the second bottom layer sub-pixel comprises a second light emitting layer, and the third bottom layer sub-pixel comprises a third light emitting layer;
preferably, the thickness of the third light-emitting layer and the thickness of the second light-emitting layer are respectively greater than the thickness of the first light-emitting layer;
preferably, the thickness of the second light emitting layer is greater than the thickness of the third light emitting layer.
4. The display panel according to claim 3, wherein the light-emitting efficiency of the second light-emitting layer and the light-emitting efficiency of the third light-emitting layer are respectively smaller than the light-emitting efficiency of the first light-emitting layer;
preferably, under the same luminance, when the lifetime of the third bottom layer sub-pixel is shorter than the lifetime of the second bottom layer sub-pixel, the light emitting efficiency of the second light emitting layer is lower than the light emitting efficiency of the third light emitting layer, and when the lifetime of the third bottom layer sub-pixel is equal to the lifetime of the second bottom layer sub-pixel, the light emitting efficiency of the second light emitting layer is equal to the light emitting efficiency of the third light emitting layer;
preferably, the spectrum of light emitted by the first light-emitting layer has a first half-peak width, the spectrum of light emitted by the second light-emitting layer has a second half-peak width, and the spectrum of light emitted by the third light-emitting layer has a third half-peak width; the second half-peak width and the third half-peak width are respectively greater than the first half-peak width;
preferably, when the light emission efficiency of the second light emitting layer is less than the light emission efficiency of the third light emitting layer, the third half-peak width is less than the second half-peak width; the third half-peak width is equal to the second half-peak width when the light emission efficiency of the second light emitting layer is equal to the light emission efficiency of the third light emitting layer.
5. The display panel according to claim 3 or 4, wherein the second light-emitting layer comprises a second fluorescent material, and the second fluorescent material comprises triarylamines and derivatives thereof, perylenes and derivatives thereof, anthracenes and derivatives thereof, or alkenes and derivatives thereof;
preferably, the third light-emitting layer includes a third fluorescent material, and the third fluorescent material includes triarylamines and derivatives thereof, perylenes and derivatives thereof, anthracenes and derivatives thereof, or alkenes and derivatives thereof;
preferably, the triarylamines and derivatives thereof include DSAPh, DPAVBi or BczVBi;
preferably, the perylene and derivatives thereof comprise TBP;
preferably, the anthracene AND the derivative thereof comprise AND, TBADN, MADN, DTBADN, TTBADN, alpha-TMADN AND beta-TMADN;
preferably, the alkenes and derivatives thereof include DPVBi;
the chemical formula of DSAPh is:
the chemical formula of DPAVBi is:
the chemical formula of BczVBi is:
the chemical formula of TBP is:
the chemical formula of AND is:
the chemical formula of TBADN is:
MADN has the formula:
DTBADN has the chemical formula:
TTBADN has the formula:
α -TMADN has the formula:
the chemical formula of beta-TMADN is:
the chemical formula of DPVBi is:
6. the display panel according to claim 3 or 4, wherein the first light-emitting layer comprises a first fluorescent material comprising a boron-nitrogen resonant material, or a boron-nitrogen hetero-fused cyclic aromatic hydrocarbon and a derivative thereof;
preferably, the boron-nitrogen resonance material is v-DABNA;
ν -DABNA has the chemical formula:
preferably, the boron nitrogen heterocyclic fused ring aromatic hydrocarbon and the derivative thereof have the chemical formula
Or
Wherein X is sulfur or oxygen.
7. The display panel according to claim 3 or 4, wherein the second bottom sub-pixel is a stacked structure, and/or the third bottom sub-pixel is a stacked structure; the first bottom sub-pixel is provided with a single-layer first light-emitting layer in the light-emitting direction of the first bottom sub-pixel;
when the second bottom layer sub-pixels are of a laminated structure, the second bottom layer sub-pixels are provided with a plurality of second light emitting layers in the light emitting direction of the second bottom layer sub-pixels;
when the third bottom sub-pixel is of a laminated structure, the third bottom sub-pixel is provided with a plurality of third light-emitting layers in the light-emitting direction of the third bottom sub-pixel;
preferably, when the second bottom sub-pixel and the third bottom sub-pixel are both of a stacked structure, the number of layers of the third light emitting layer is smaller than that of the second light emitting layer.
8. The display panel of claim 3, wherein the bottom layer pixel unit comprises a blue bottom layer pixel unit, wherein the first quantum dot sub-pixel comprises a blue quantum dot sub-pixel, wherein the second quantum dot sub-pixel comprises a green quantum dot sub-pixel, and wherein the third quantum dot sub-pixel layer comprises a red quantum dot sub-pixel.
9. A method for manufacturing a display panel, comprising:
forming a bottom layer pixel unit, wherein the bottom layer pixel unit comprises a first bottom layer sub-pixel and a second bottom layer sub-pixel, and the service life of the second bottom layer sub-pixel is longer than that of the first bottom layer sub-pixel under the same luminous brightness;
forming a quantum dot pixel unit on one side of the light emergent direction of the bottom layer pixel unit, wherein the quantum dot pixel unit comprises a first quantum dot sub-pixel and a second quantum dot sub-pixel, the first quantum dot sub-pixel is positioned on one side of the light emergent direction of the first bottom layer sub-pixel, and the second quantum dot sub-pixel is positioned on one side of the light emergent direction of the second bottom layer sub-pixel;
when the quantum dot pixel unit emits white light, the light emitting brightness of the second quantum dot sub-pixel in the quantum dot pixel unit is larger than that of the first quantum dot sub-pixel.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 8.
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