Organic electroluminescence device

A technology of luminescence and devices, which is applied in the direction of electroluminescence light sources, electric solid-state devices, electric light sources, etc., can solve the problems of increasing the difficulty of substrate storage, unsuitable for production and practical use, etc., to improve life and mechanical properties, and improve flexibility Sexuality and water oxygen barrier properties, the effect of reducing defects

Active Publication Date: 2009-10-21
BEIJING VISIONOX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method will increase the difficulty of substrate storage and is not suitable for practical production.

Method used

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  • Organic electroluminescence device
  • Organic electroluminescence device
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Examples

Experimental program
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preparation example Construction

[0029](1) Preparation of the anode layer: the substrate is a flexible substrate, and the anode layer is deposited on the substrate. The anode can be made of inorganic materials or organic conductive polymers. Inorganic materials are generally metal oxides such as indium tin oxide (ITO), zinc oxide, and tin zinc oxide, or metals with high work functions such as gold, copper, and silver. The optimal choice ITO, usually the square resistance of the ITO film is 50Ω, and the film thickness is generally 150nm. The organic conductive polymer is preferably a material in polythiophene / sodium polyvinylbenzenesulfonate (PEDOT:PSS) and polyaniline (PANI) ;

[0030] (2) Cleaning of the substrate with pre-engraved anodes: the transparent conductive flexible substrate is cleaned by lye spray and deionized water ultrasonic method, after cleaning, it is placed under an infrared lamp for drying, and then the dried The substrate is pretreated by ultraviolet ozone cleaning and low-energy oxygen ...

Embodiment 1

[0041] OLED / Thick Film: Desiccant Particles

[0042] The schematic diagram of the device structure is as figure 1 1 is the substrate of the OLED device, 2 is the anode of the OLED device, 3 is the organic functional layer of the OLED device, 4 is the cathode layer of the OLED device, and 5 is the thick film layer in the packaging structure of the OLED device.

[0043] The specific structure of the device:

[0044] PET substrate / ITO / NPB / Alq 3 / Mg:Ag / Polymethylmethacrylate: CaO

[0045] (1) Cleaning of PET substrates pre-engraved with ITO: use lye spray and deionized water ultrasonic methods to clean the transparent conductive substrates, place them under infrared lamps for drying after cleaning, and then dry the dried ITO glass is pretreated by ultraviolet ozone cleaning and low-energy oxygen ion beam bombardment. The ITO film on the conductive substrate is used as the anode layer of the device. The square resistance of the ITO film is 50Ω and the film thickness is 150nm;

...

Embodiment 2

[0050] OLED / Thick Film / Desiccant Particles / Thick Film

[0051] The specific structure of the device:

[0052] PES substrate / ITO / NPB / Alq 3 / Mg:Ag / phenolic resin / sodium / UV glue

[0053] Steps (1)-(3): Prepare the same as (1)(2)(3) in Example 1, and use PES as the substrate material of the OLED device;

[0054] (4) Preparation of encapsulation layer: take out the vapor-deposited device from the vacuum chamber, and transfer it to an environment where water and oxygen are removed to prepare the encapsulation layer. First, prepare a layer of heat-curing adhesive phenolic resin on the metal layer of the OLED device by scraping the film, with a thickness of about 400 μm, and then sprinkle spherical metal Na on it to form a discontinuous distribution. The average size of Na particles is about 10 μm. , and then heat the phenolic resin to about 40°C for 10 minutes to cure it; finally, spin-coat UV glue (UV STRCTL 352, Loctite Company) on the surface of metal Na, and use ultraviolet li...

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Abstract

The invention relates to a flexible organic electroluminescent device, which improves the lifespan of the soft screen by increasing the absorption performance of moisture and oxygen. The organic electroluminescent device of the present invention includes a packaging structure, the packaging structure includes a thick film layer formed by a polymer material, the thick film layer is doped with a desiccant, and the desiccant is selected from alkali metals, alkaline earth metals and metal oxides At least one of compound, zeolite, metal alkoxide with long chain hydrocarbon, sulfate, halide, perchlorate. In the present invention, the encapsulation structure is located on one side or both sides of the flexible organic electroluminescent device. Adopting the packaging structure of the present invention simplifies the preparation process of the packaging, reduces defects in the preparation process, improves the flexibility and water-oxygen barrier performance of the device, and prolongs the service life of the device.

Description

technical field [0001] The invention relates to a packaging structure of a flexible organic electroluminescence device and a preparation method thereof, belonging to the technical field of organic electroluminescence. Background technique [0002] Today, with the development of multimedia technology and the advent of the information society, the requirements for the performance of flat panel displays are getting higher and higher. Organic electroluminescent displays (OLEDs) have a series of advantages such as self-luminescence, low-voltage DC drive, full curing, wide viewing angle, and rich colors. Compared with liquid crystal displays, OLEDs do not require a backlight, have a large viewing angle, and low power. The response speed can reach 1000 times that of LCD, but its manufacturing cost is lower than that of LCD with the same resolution. Therefore, OLEDs have broad application prospects and are regarded as one of the extremely competitive future flat panel display techn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/54H01L51/52H01L23/29H05B33/04C09K3/10
Inventor 邱勇谢静高裕弟刘嵩
Owner BEIJING VISIONOX TECH
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