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Organic electroluminescent device and method for producing same

An electroluminescence device and electroluminescence technology, which are applied in the manufacturing of organic semiconductor devices, electric solid state devices, and semiconductor/solid state devices, etc., can solve the problems of device temperature rise, insufficient packaging, poor heat dissipation, etc., and achieve tight and good sealing. Packaging effect, good heat dissipation effect

Inactive Publication Date: 2014-05-21
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal cover packaging can not only effectively prevent water vapor, oxygen and other components from penetrating into the device to protect the OLED, but also make the device strong, but its opacity limits the application of this packaging method in organic electroluminescent devices.
The glass cover plate has excellent chemical stability, electrical insulation and compactness, but its poor heat dissipation can easily lead to a rapid rise in device temperature, and the organic material in the device will crystallize, resulting in shortened life of the organic electroluminescent device
At the same time, when using a sealant to bond the substrate and the glass cover, because the packaging is not tight enough, the moisture in the air can easily penetrate into the interior of the device, resulting in ink dots
Therefore, in this packaging method, calcium oxide or barium oxide is generally added inside the device as a desiccant to absorb moisture, but adding a desiccant makes the device structure complicated, cost increased, and cumbersome to prepare.

Method used

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  • Organic electroluminescent device and method for producing same
  • Organic electroluminescent device and method for producing same

Examples

Experimental program
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Effect test

Embodiment 1

[0055] A method for preparing an organic electroluminescent device, including the following steps:

[0056] (1) Pretreatment of the anode conductive substrate 1: the anode conductive substrate 1 is an indium tin oxide (ITO) glass substrate, acetone cleaning→ethanol cleaning→deionized water cleaning→ethanol cleaning, all are cleaned with an ultrasonic cleaning machine, a single cleaning 5 minutes, then blow dry with nitrogen, and oven dry for later use; the cleaned anode conductive substrate 1 needs to be surface activated to increase the oxygen content of the conductive surface layer and improve the work function of the conductive layer surface; The thickness of the conductive substrate 1 is 100 nm;

[0057] (2) Preparation of functional layer and light-emitting layer:

[0058] Hole injection layer 2: The hole injection layer 2 is vacuum-evaporated on the surface of the anode conductive substrate 1 by covering the mask. The mask is arranged around the edge of the upper surface of th...

Embodiment 2

[0072] A method for preparing an organic electroluminescent device, including the following steps:

[0073] (1), (2), (3) are the same as in Example 1;

[0074] (4) Preparation of protective layer: A protective layer with the same size as the cathode layer is prepared on the surface of the cathode layer by vacuum evaporation. The material of the protective layer is NPB, and the vacuum degree is 5×10. -5 Pa, evaporation rate Thickness 300nm;

[0075] (5) Preparation of the insulating layer: The insulation surrounding the hole injection layer, hole transport layer, light emitting layer, electron transport layer, electron injection layer, cathode layer and protective layer is set on the anode conductive substrate by magnetron sputtering. Layer, insulating layer material is Al 2 O 3 , The target is Al 2 O 3 , The background vacuum is 5×10 -5 Pa, enter Ar, flow rate is 5sccm, the radial width of the insulating layer is 3mm, and the thickness is 200nm;

[0076] (6) Preparation of the first...

Embodiment 3

[0081] A method for preparing an organic electroluminescent device, including the following steps:

[0082] (1), (2), (3) are the same as in Example 1;

[0083] (4) Preparation of protective layer: A protective layer with the same size as the cathode layer is prepared on the surface of the cathode layer by vacuum evaporation, and the material of the protective layer is Alq 3 , The vacuum degree is 5×10 -5 Pa, the evaporation rate is The thickness is 250nm;

[0084] (5) Preparation of the insulating layer: The insulation surrounding the hole injection layer, hole transport layer, light emitting layer, electron transport layer, electron injection layer, cathode layer and protective layer is set on the anode conductive substrate by magnetron sputtering. Layer, the insulating layer is made of Si 3 N 4 , The target is Si 3 N 4 , The background vacuum is 5×10 -5 Pa, enter Ar, the flow rate is 5sccm, the radial width of the insulating layer is 4mm, and the thickness is 200nm;

[0085] (6) P...

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Abstract

The invention provides an organic electroluminescent device comprising an anode conductive substrate, a functional layer, a luminescent layer, a cathode layer, a protective layer, and an encapsulating layer. The encapsulating layer comprises an insulating layer, metallic layers, and plate glass. The insulating layer is arranged in a surrounding manner along the edge of the top surface of the anode conductive substrate. A groove is surrounded by the insulating layer surrounding structure. The functional layer, the luminescent layer, the cathode layer, and the protective layer are successively extended from the top surface of the anode conductive substrate to the groove. The metallic layers are disposed on the top surface of the insulating layer and a gap is arranged between the metallic layers and the functional layer, the luminescent layer, the cathode layer, and the protective layer. The sum of heights of the insulating layer and the metallic layers is more than that of the functional layer, the luminescent layer, the cathode layer, and the protective layer. The plate glass is disposed on the top surfaces of the metallic layers. The invention also provides a method for producing the organic electroluminescent device. The method effectively reduces erosion, caused by moisture and oxygen, on the device, and substantially prolongs the service life of the device.

Description

Technical field [0001] The invention relates to the related field of electronic devices, in particular to an organic electroluminescence device and a preparation method thereof. Background technique [0002] Organic electroluminescent device (OLED) is a current-type semiconductor light-emitting device based on organic materials. Its typical structure is to prepare tens of nanometers thick organic light-emitting material on ITO glass as the light-emitting layer, and there is a metal electrode with low work function above the light-emitting layer. When a voltage is applied to the electrode, the light-emitting layer generates light radiation. [0003] OLED devices have the advantages of active light emission, high luminous efficiency, low power consumption, lightness, thinness, and no viewing angle limitation. They are considered by the industry to be the new generation of devices most likely to occupy a dominant position in the future lighting and display device market. As a brand-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52H01L51/54H01L51/56
CPCH10K50/8445H10K2102/00H10K71/00
Inventor 周明杰王平钟铁涛冯小明
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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