Organic light-emitting diode 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., can solve the problems of limiting the performance of flexible OLED products, weak water and oxygen resistance, and complicated preparation process, etc. Achieve excellent corrosion resistance, improve light transmittance, and high chemical stability.

Inactive Publication Date: 2014-10-01
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

[0004] For flexible OLED products, if traditional OLED packaging technology is used, adding a packaging cover on the back of the device will cause problems such as heavy weight, high cost, and poor mechanical strength, which will limit the performance of flexible OLED products.
At present, most flexible OLEDs are not waterproof and oxygen-resistant, and have a short service life. The preparation process is complicated and the cost is high.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0119] An organic electroluminescent device is prepared through the following steps:

[0120] (1) Provide a clean anode conductive substrate:

[0121] Clean the ITO glass substrate with acetone, ethanol, deionized water, and ethanol in an ultrasonic cleaner in sequence, wash and wash for 5 minutes in one item, then blow dry with nitrogen, and dry in an oven for later use; surface activation of the cleaned ITO glass processing; ITO thickness is 100nm;

[0122] (2) Vacuum evaporation of the luminescent functional layer on the ITO glass substrate:

[0123] Specifically, the hole injection layer, the hole transport layer, the light emitting layer, the electron transport layer and the electron injection layer are prepared by vacuum evaporation in sequence;

[0124] Preparation of the hole injection layer: the MoO 3 Doped into NPB, the doping mass fraction is 30%, the thickness is 10nm, and the vacuum degree is 1×10 -5 Pa, evaporation rate

[0125] Preparation of the hole tra...

Embodiment 2

[0141] An organic electroluminescent device is prepared through the following steps:

[0142] (1), (2), (3) are the same as embodiment 1;

[0143] (4) Prepare the encapsulation layer on the outside of the cathode:

[0144] An encapsulation layer unit is prepared by the following method: sequentially vacuum evaporation to prepare the first organic barrier layer, the second organic barrier layer, the mixed barrier layer, the third organic barrier layer, the fourth organic barrier layer and the inorganic barrier layer, specifically :

[0145] Production of the first organic barrier layer: NPB is used as the material of the first organic barrier layer, and the vacuum degree is 1×10 -4 Pa, evaporation rate Thickness 300nm;

[0146] Production of the second organic barrier layer: BCP is used as the material of the second organic barrier layer, and the vacuum degree is 1×10 -4 Pa, evaporation rate Thickness 300nm;

[0147] Production of mixed barrier layer: The mixed barrier...

Embodiment 3

[0153] An organic electroluminescent device is prepared through the following steps:

[0154] (1), (2), (3) are the same as embodiment 1;

[0155] (4) Prepare the encapsulation layer on the outside of the cathode:

[0156] An encapsulation layer unit is prepared by the following method: sequentially vacuum evaporation to prepare the first organic barrier layer, the second organic barrier layer, the mixed barrier layer, the third organic barrier layer, the fourth organic barrier layer and the inorganic barrier layer, specifically :

[0157] Production of the first organic barrier layer: Alq3 is used as the material of the first organic barrier layer, and the vacuum degree is 1×10 -4 Pa, evaporation rate Thickness 250nm;

[0158] Production of the second organic barrier layer: TPBi is used as the material of the second organic barrier layer, and the vacuum degree is 1×10 -4 Pa, evaporation rate Thickness 250nm;

[0159] Production of mixed barrier layer: The mixed barri...

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Abstract

The invention aims at providing an organic light-emitting diode in a packaging layer structure. A packaging layer is in a composite structure formed by overlapping a packaging layer unit, and the packaging layer unit comprises a first organic barrier layer, a second organic barrier layer, a mixed barrier layer, a third organic barrier layer, a fourth organic barrier layer and an inorganic barrier layer which are laminated sequentially. Corrosion of active substances such as external water and oxygen to the organic light-emitting diode can be avoided effectively, and the service life of the organic light-emitting diode can be prolonged. The invention further provides a preparation method of the organic light-emitting diode. The preparation method is simple in technology and cheap in raw material, and facilitates large area preparation.

Description

technical field [0001] The invention relates to the field of organic electroluminescence, in particular to an organic electroluminescence device and a preparation method thereof. Background technique [0002] An organic electroluminescent device (OLED) is an energy conversion device that uses organic materials as light-emitting materials and can convert applied electrical energy into light energy. It has outstanding performances such as ultra-thin, self-luminous, fast response, low power consumption, etc., and has extremely broad application prospects in display, lighting and other fields. [0003] The structure of the organic electroluminescent device is a sandwich structure, and an organic light-emitting layer is sandwiched between the cathode and the anode. The organic substances in the light-emitting layer of OLEDs are very sensitive to pollutants, oxygen and moisture in the atmosphere. Long-term exposure will reduce the light-emitting performance of organic electrolumi...

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 周明杰钟铁涛王平陈吉星
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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