Method for preparing uneven particle layer, organic electroluminescence device and display device

一种粒子层、致发光的技术，应用在有机半导体器件、电固体器件、光学元件等方向，能够解决取光效率低等问题，达到提高取光效率、器件性能稳定、周期性良好的效果

Active Publication Date: 2017-03-15
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention aims at the problem of low light extraction efficiency of existing OLED devices, and provides a method for preparing an uneven particle layer, an organic electroluminescence device and a display device

Method used

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  • Method for preparing uneven particle layer, organic electroluminescence device and display device
  • Method for preparing uneven particle layer, organic electroluminescence device and display device
  • Method for preparing uneven particle layer, organic electroluminescence device and display device

Examples

Experimental program
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Embodiment 1

[0032] This embodiment provides a method for preparing an uneven particle layer, comprising the following steps:

[0033] forming a layer of nanoparticles on the substrate;

[0034] heating the substrate so that the nanoparticles in contact with the substrate melt while the nanoparticles on the surface are in a solid state;

[0035] Cooling the above substrate forms a nanoparticle layer with an uneven surface.

[0036] The preparation method of the uneven particle layer in this embodiment only needs to add coating and heating steps, and the method is simple and easy for industrial production. The surface unevenness of the uneven particle layer prepared by this method is uniform and periodic. The substrate comprising the nanoparticle layer is used in an OLED device, the performance of the device is stable, and the propagation direction of the light of the organic light-emitting layer of the OLED device can be changed to avoid the formation of total internal reflection at the i...

Embodiment 2

[0038] This embodiment provides a method for preparing an uneven particle layer, such as image 3 shown, including the following steps:

[0039] S1, forming a nanoparticle layer on the substrate;

[0040] Mixing the nanoparticles with the solvent and dispersant of the nanoparticles to form a mixed liquid of the nanoparticles; that is, mixing the nanoparticles with the solvent and the dispersant, wherein the dispersant helps to promote the discharge of the nanoparticles on the surface of the substrate 4 Cloth, prevents the accumulation of nanoparticles and helps to form a monolayer of nanoparticles.

[0041] Preferably, the nanoparticles are spherical in shape.

[0042] Wherein, when the shape of the nanoparticles is spherical, the degree of surface unevenness of the formed uneven particle layer 5 is uniform and the periodicity is good. When it is used in an OLED device, the light will not undergo total internal reflection on the spherical surface, and the direction of light...

Embodiment 3

[0064] This embodiment provides an organic electroluminescent device, such as Figure 4 As shown, it includes a substrate 4 , an anode 3 , an organic light-emitting layer 2 and a cathode 1 ; the substrate 4 is the substrate 4 prepared by the method of the above-mentioned embodiment 2 and includes an uneven particle layer.

[0065] In this embodiment, a specific OLED device A is given:

[0066] Wherein, the nanoparticles are polystyrene nanoparticles with a particle diameter of 600nm, the solvent is methanol, and the dispersant is PVP.

[0067] The substrate 4 is made of PET (polyethylene terephthalate), the material of the anode 3 is aluminum, and the thickness of the anode 3 is 150 nm.

[0068] Concrete preparation steps include:

[0069] Add polystyrene nanoparticles with a particle size of 600nm and dispersant PVP into the solvent methanol and mix evenly to form a mixed solution;

[0070] Coating the above mixed solution on the PET substrate 4;

[0071] Heating the side...

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Abstract

The invention provides a preparation method of an uneven particle layer, an organic electroluminescence device and a display device, which belong to the technical field of display and can solve the problem of low light extraction efficiency of the existing OLED device. The preparation method of the uneven particle layer of the present invention includes forming a nano particle layer on a substrate; heating the substrate to melt the nanoparticles in contact with the substrate, and the nanoparticles on the surface are solid; cooling the substrate to form nano particles with uneven surface Steps for particle layers. The preparation method of the present invention is simple in process and easy for industrial production, and the substrate comprising the uneven particle layer is used in an OLED device, which can change the propagation direction of the light of the organic light-emitting layer of the OLED device, avoid the formation of total internal reflection at the interface, and make more More light is emitted into the air, which improves the light extraction efficiency of the OLED device. The organic electroluminescent device prepared by the method of the present invention is suitable for various display devices.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to a preparation method of an uneven particle layer, an organic electroluminescent device and a display device. Background technique [0002] OLED (Organic Light Emitting Diode, organic electroluminescent) device has self-illumination, no backlight, high contrast, thin thickness, wide viewing angle, fast response speed, can be used for flexible panels, wide operating temperature range, structure It is considered to be an emerging technology of the next generation of flat panel display devices due to its excellent characteristics such as simple manufacturing process. [0003] The structure diagram of the existing OLED device is shown as figure 1 , figure 2 As shown, it includes cathode, organic light-emitting layer, anode and glass substrate. [0004] The inventors have found that there are at least the following problems in the prior art: when the photons emitted by...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/56H01L51/52
CPCH10K50/85H10K71/00H10K2102/331G02B1/118C09D7/68C09D125/06H10K50/80H10K50/854H10K50/858H10K85/111H10K85/141H10K2102/361C09D133/10
Inventor 郭远辉臧远生刘智李小和王辉
Owner BOE TECH GRP CO LTD
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