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Organic electroluminescence device

An electroluminescent device and luminescent technology, applied in the direction of electroluminescent light source, electric solid-state device, electric light source, etc., can solve the problems of increasing the difficulty of substrate storage, unsuitable for production and practical use, and improve life and mechanical properties , Improve flexibility and water-oxygen barrier properties, and reduce defects

Active Publication Date: 2007-12-26
BEIJING VISIONOX TECH
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  • 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

Examples

Experimental program
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preparation example Construction

[0030](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), polyaniline (PANI) ;

[0031] (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 ion...

Embodiment 1

[0042] OLED / Thick Film: Desiccant Particles

[0043] The schematic diagram of the device structure is shown in Figure 1, where 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 thickness of the OLED device packaging structure. film layer.

[0044] The specific structure of the device:

[0045] PET substrate / ITO / NPB / Alq 3 / Mg:Ag / PMMA:CaO

[0046] (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;

[0047] ...

Embodiment 2

[0051] OLED / Thick Film / Desiccant Particles / Thick Film

[0052] The specific structure of the device:

[0053] PES substrate / ITO / NPB / Alq 3 / Mg:Ag / phenolic resin / sodium / UV glue

[0054] Steps (1)-(3): Prepare the same as (1)(2)(3) in Example 1, and use PES as the substrate material of the OLED device;

[0055] (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 organic electroluminescence device (OELD) includes packaging structure. The packaging structure includes a layer of thick film formed from polymeric material. Dryer is doped in the layer of thick film. The dryer includes alkali metals, alkaline earth metal and at least one object selected from following matters: metallic oxide, zeolite, and metal alcoholates with hydrocarbon in long chain, sulfate, halide, and perchlorate. The packaging structure is located at one side or two sides of OELD. The invention simplifies packaging technique, reduces defects in preparing procedures, raising flexibility and performance for obstructing water and oxygen so as to raise service life of 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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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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