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Organic electroluminescent device and packaging method thereof

A technology of electroluminescent devices and packaging methods, which is applied in the direction of organic semiconductor devices, organic semiconductor device materials, electric solid devices, etc., and can solve problems such as short service life, easy to be corroded, and reduced luminous quantum efficiency, and achieve service life high effect

Inactive Publication Date: 2014-09-17
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the light-emitting layer in the OLED is very sensitive to pollutants, oxygen, water vapor, etc. in the atmosphere. Chemical reactions under the action of pollutants, oxygen, and water vapor will lead to a decrease in the quantum efficiency of light emission, and the cathode is generally composed of a more active Metal formation, vulnerable to corrosion in air or oxygen, resulting in poor stability and short service life of OLEDs

Method used

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  • Organic electroluminescent device and packaging method thereof
  • Organic electroluminescent device and packaging method thereof
  • Organic electroluminescent device and packaging method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] The structure is ITO / MoO 3 :NPB / TCTA / Ir(ppy) 3:TPBI / Bphen / CsN 3 :Bphen / ZnS / Ag / ZnS / (CuPc / Re 2 O:LiF) 7 Encapsulation of organic electroluminescent devices

[0095] (1) Provide an anode, the anode is indium tin oxide glass, expressed as ITO. First, put the anode into acetone, ethanol, deionized water and ethanol for ultrasonic cleaning, each ultrasonic cleaning for 5 minutes, then blow dry with nitrogen, and then dry in an oven to obtain a clean and dry anode. Further use UV-ozone (UV-ozone) to treat the cleaned and dried anode for surface activity treatment for 30 minutes to increase the oxygen content on the surface of the anode and improve the work function of the anode;

[0096] (2) The hole injection layer formed on the surface of the anode by vacuum evaporation, the vacuum degree of vacuum evaporation is 1×10 -5 Pa, the evaporation rate is The hole injection layer is made of molybdenum trioxide (MoO 3 ) doped in N,N'-diphenyl-N,N'-di(1-naphthyl)-1,1'-biphen...

Embodiment 2

[0106] The structure is ITO / MoO 3 :NPB / TCTA / Ir(ppy) 3 :TPBI / Bphen / CsN 3 :Bphen / ZnS / Ag / ZnS / (NBP / ReO:CeF 2 ) 6 Encapsulation of organic electroluminescent devices

[0107] In steps (1) to (7), the rest is the same as that in Example 1, except that the time for surface activation treatment on the anode is 50 minutes.

[0108] (8) Vacuum evaporation is used to form an organic barrier layer on the cathode, and the vacuum degree of vacuum evaporation is 5×10 -5 Pa, the evaporation rate is The organic barrier layer is formed by N,N'-diphenyl-N,N'-di(1-naphthyl)-1,1'-biphenyl-4,4'-diamine (NPB); the organic barrier layer a thickness of 250 nm;

[0109] (9) Vacuum evaporation is used to co-evaporate rhenium oxide and cerium fluoride to form an inorganic barrier layer on the organic barrier layer, and the vacuum degree is 5×10 -5 Pa,, the evaporation rate is The inorganic barrier layer is formed by mixing rhenium oxide with cerium fluoride, expressed as ReO:CeF 2 , wherein t...

Embodiment 3

[0112] The structure is ITO / MoO 3 :NPB / TCTA / Ir(ppy) 3 :TPBI / Bphen / CsN 3 :Bphen / ZnS / Ag / ZnS / (Alq 3 / Re 2 o 3 :MgF 2 ) 6 Encapsulation of organic electroluminescent devices

[0113] In steps (1) to (7), the rest is the same as that in Example 1, except that the time for surface activation treatment on the anode is 40 minutes.

[0114] (8) Vacuum evaporation is used to form an organic barrier layer on the cathode, and the vacuum degree of vacuum evaporation is 5×10 -5 Pa, the evaporation rate is The organic barrier layer consists of (8-hydroxyquinoline)-aluminum (Alq 3 ) formation; the thickness of the organic barrier layer is 200 nm;

[0115] (9) Vacuum evaporation is used to co-evaporate rhenium oxide and magnesium fluoride to form an inorganic barrier layer on the organic barrier layer, and the vacuum degree is 5×10 -5 Pa, the evaporation rate is The inorganic barrier layer is formed by mixing rhenium oxide with magnesium fluoride, expressed as Re 2 o 3 :MgF 2 ...

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Abstract

The invention discloses an organic electroluminescent device and a packaging method thereof. The device comprises an anode, a cavity injection layer, a cavity transmission layer, a luminescent layer, an electron transmission layer, an electron injection layer and a cathode which are successively stacked, and five to seven protection layers stacked on the cathode. Each protection layer comprises an organic barrier layer and an inorganic barrier layer. Each organic barrier layer is formed by copper phthalocyanine, N,N'-diphenyl-N,N'-di(1-naphthyl)-1,1'-biphenyl-4,4'-diamine, (8-hydroxyquinoline)aluminum, 4,4',4''-tris(N-3-methylphenyl-N-phenylamino)triphenylamine or 2,9-dimethyl-4,7-diphenyl-1,10-phenanthrolin. Each inorganic barrier layer is formed by mixing one from dirhenium oxide, rhenium oxide, rhenium sesquioxide, rhenium dioxide, dirhenium pentoxide and rhenium trioxide with one from lithium fluoride, cerium fluoride, magnesium fluoride, aluminum fluoride, calcium fluoride and barium fluoride. The service life of the organic electroluminescent device is enabled to be longer.

Description

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

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/54H01L51/56
CPCH10K50/8445H10K2102/00H10K71/00
Inventor 周明杰王平钟铁涛陈吉星
Owner OCEANS KING LIGHTING SCI&TECH CO LTD