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Organic electroluminescent device

An electroluminescence device and a luminescence technology, which are applied in the direction of electric solid-state devices, electrical components, semiconductor devices, etc., can solve the problems of increased cost, inability to prepare large-area screens, and complicated preparation processes, so as to improve light extraction The effect of high efficiency, improved light extraction efficiency, and simple preparation process

Active Publication Date: 2012-03-14
GUAN YEOLIGHT TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For display devices, the above method has some problems, which may blur the boundaries between pixels, resulting in reduced clarity, or complicated manufacturing processes, resulting in increased costs, or cannot be used to prepare large-area screens. For lighting devices, the above-mentioned The methods are all feasible, but it will increase the complexity of the process and increase the cost

Method used

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  • Organic electroluminescent device
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  • Organic electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1 (1-1 to 1-6):

[0050] ITO(180nm)+PEDOT:PSS(100nm)(rectangular network structure)

[0051] / NPB(40nm) / Alq 3 :C545T(30nm, 1.3%) / Alq 3 (20nm) / LiF(0.5nm) / Al(150nm)

Embodiment 2

[0053] The structure of the device is the same as that of Example 1, except that a film with a microlens structure is added on the device substrate of this example, and the diameter of the microlens is 45 nm.

[0054] The preparation process step of embodiment 1:

[0055] (1) substrate cleaning: with the step (1) of comparative example 1;

[0056] (2) Prepare a layer of rectangular grid-shaped isolation column layer on the above-mentioned substrate, this layer is used to locate the grid position, and the material of the isolation column is polyimide;

[0057] (3) Plasma treatment is carried out on the surface of the above-mentioned substrate, so that it does not infiltrate the surface of the polyimide spacer column during printing, but still maintains good wettability to the surface;

[0058] (4) A layer of PEDOT:PSS is prepared by inkjet printing on the above substrate, and each PEDOT:PSS droplet is dropped in the positioned grid, finally forming a rectangular network struct...

Embodiment 3

[0067] Embodiment 3 (3-1 to 3-6)

[0068] ITO(180nm)+PANI(120nm)(rectangular network structure) / NPB(20nm) / BAlq:TBPe(30nm, 2%) /

[0069] Alq 3 (20nm) / LiF(0.5nm) / Al(150nm)

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Abstract

The invention discloses an organic electroluminescent device, which comprises a substrate, a first electrode layer positioned on the substrate, a light extraction layer positioned on the first electrode layer, an organic functional layer positioned on the light extraction layer, and a second electrode layer positioned on the organic functional layer in turn, wherein the organic functional layer consists of at least one luminous layer. The organic electroluminescent device is characterized in that the light extraction layer has a grid shape, and is made of a polymer material with low refractive index coefficient between 1.0 and 3.0. The organic electroluminescent device effectively improves the light extraction efficiency.

Description

technical field [0001] The present invention relates to an organic electroluminescent device (Organic Light Emitting Device, referred to as OLED hereinafter), in particular to a structure for improving the light extraction efficiency of the OLED. Background technique [0002] OLED has attracted widespread attention due to its thin body, large area, full curing, and flexibility. It has important applications in the fields of display and lighting. Both display and lighting fields require high external quantum efficiency. [0003] At present, the bottleneck that cannot achieve high external quantum efficiency mainly lies in the light extraction technology. Only about 20% of the light generated inside the OLED can be output to the outside of the device. This is because there are "substrate mode" and "waveguide mode", "substrate mode" Mode" is due to the high refractive index of the substrate and air. When the light passes through the substrate and reaches the air, it will be ful...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50H01L51/54H01L51/56
Inventor 邱勇段炼李艳蕊
Owner GUAN YEOLIGHT TECH CO LTD