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Organic light-emitting device and preparation method thereof

An electroluminescence device and electroluminescence technology, which are applied in the directions of organic semiconductor devices, materials of organic semiconductor devices, and electric solid devices, etc., to achieve the effects of improving lifespan, simple packaging method, and easy large-area preparation.

Inactive Publication Date: 2014-06-11
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

The method of the invention is suitable for encapsulating organic electroluminescent devices prepared with conductive glass substrates
The method of the invention is especially suitable for encapsulating flexible organic electroluminescent devices

Method used

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  • Organic light-emitting device and preparation method thereof
  • Organic light-emitting device and preparation method thereof
  • Organic light-emitting device and preparation method thereof

Examples

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Effect test

preparation example Construction

[0057] according to figure 2 It can be known that the preparation method of the organic electroluminescent device 100 provided by the present invention, the specific steps include:

[0058] S101 prepare an anode 20 on the substrate 10 and form a functional layer 30 on the anode 20 .

[0059] The functional layer 30 includes a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer stacked in sequence.

[0060] The substrate 10 may be a glass substrate or an organic polyethylene terephthalate (PET) film substrate. The substrate 10 has an anode 20 prepared therein, and the anode 20 is an ITO layer. The thickness of the ITO layer is 100nm~150nm.

[0061] Before forming the anode 20 and the functional layer 30 , the surface of the substrate 10 is pretreated to remove pollutants on the surface of the substrate 10 , and the surface is activated to increase the oxygen content on the surface of the substrat...

Embodiment 1

[0082] A method for preparing an organic electroluminescent device, comprising the following steps:

[0083]1. Substrate pretreatment and anode preparation: Use acetone, ethanol, deionized water and ethanol in sequence to clean with an ultrasonic cleaner. The cleaning time for each washing is 5 minutes, then blow dry with nitrogen, and use an oven to dry before use ; ITO glass is arranged on the substrate, and the substrate loaded with ITO glass is subjected to surface activation treatment to increase the oxygen content of the surface layer and improve the work function of the anode surface; the thickness of the ITO glass is 100nm;

[0084] 2. Preparation of functional layer:

[0085] Evaporating a hole injection layer on the anode;

[0086] The material of the hole injection layer includes N,N'-di(1-naphthyl)-N,N'-diphenyl-1,1'-biphenyl-4-4'-diamine (NPB) and doped Molybdenum oxide (MoO 3 ). MoO 3 The mass percentage content is 30%. The thickness of the hole injection l...

Embodiment 2

[0108] A method for preparing an organic electroluminescent device, comprising the following steps:

[0109] 1,2,3 are the same as embodiment 1;

[0110] 4. Preparation of encapsulation layer:

[0111] An encapsulation layer is provided on the cathode, and the encapsulation layer includes a protective layer, an oxynitride film, an organic barrier layer, a moisture absorption layer and a heat dissipation layer;

[0112] Evaporate on the cathode to form a protective layer. The material of the protective layer is N, N'-(1-naphthyl)-N, N'-diphenyl-4,4'-biphenylenediamine, and the thickness of the protective layer is 300nm. The evaporation condition is, the vacuum degree is 3×10 -5 Pa, the evaporation rate is

[0113] Magnetron sputtering is used to make an oxynitride compound film on the protective layer. The oxynitride compound film is an oxide film doped with nitride, wherein the oxide material is aluminum trioxide, the nitride material is aluminum nitride, and the oxide ...

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Abstract

Provided in the invention is an organic light-emitting device comprising a substrate, an anode, a functional layer, a cathode, a packaging layer, and a packaging cover. The substrate, the anode, the functional layer, the cathode, the packaging layer, and the packaging cover are successively laminated. The substrate and the packaging cover form an enclosed space; and the anode, the functional layer, the cathode, and the packaging layer are accommodated into the enclosed space. The packaging layer successively includes a protection layer, an oxygen-nitrogen compound film, an organic blocking layer, a moisture absorbing layer, and a cooling layer; and the oxygen-nitrogen compound film is an oxide film doped with nitride. In addition, the invention also provides a preparation method of the organic light-emitting device. With the method, erosion on the organic light-emitting device by moisture and oxygen can be effectively reduced, so that the device organic functional material and the electrode can be effectively protected and thus the service life of the organic light-emitting device can be obviously prolonged. The method is especially suitable for packaging of a flexible organic light-emitting device.

Description

technical field [0001] The invention relates to the related field of electronic devices, in particular to an organic electroluminescent device and a preparation 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 prepare an organic luminescent material with a thickness of tens of nanometers on the ITO glass as a light-emitting layer, and a metal electrode with a low work function is placed 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52H01L51/54H01L51/56
CPCH10K50/841H10K50/846H10K50/87H10K2102/00H10K50/844H10K71/00
Inventor 周明杰王平钟铁涛陈吉星
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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