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Organic light emitting device and preparation method thereof

An electroluminescent device and electroluminescent technology, which are applied in the fields of electric solid device, semiconductor/solid state device manufacturing, electrical components, etc., can solve the problems of poor mechanical strength, high cost, weak water and oxygen resistance, etc. and mechanical processing performance, good wear resistance and stability, good water vapor isolation effect

Inactive Publication Date: 2014-11-26
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 device and preparation method thereof
  • Organic light emitting device and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] An organic electroluminescent device is prepared through the following steps:

[0115] (1) Provide a clean anode conductive substrate:

[0116] 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;

[0117] (2) Vacuum evaporation of the luminescent functional layer on the ITO glass substrate:

[0118] Specifically, the light emitting functional layer includes a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer and an electron injection layer;

[0119] Preparation of the hole injection layer: the MoO 3 The mixture obtained by mixing with NPB according to the mass ratio of 3:7 is used as the material of the hole injection layer, the thickness is 10nm, and the vacuum degree is ...

Embodiment 2

[0134] An organic electroluminescent device is prepared through the following steps:

[0135] (1), (2), (3) are the same as embodiment 1;

[0136] (4) Prepare the encapsulation layer on the outside of the cathode:

[0137] The encapsulation layer includes three overlapping encapsulation layer units, and the encapsulation layer unit includes a first organic barrier layer, a first inorganic barrier layer, a second organic barrier layer, and a second inorganic barrier layer stacked in sequence;

[0138] Production of the first organic barrier layer: the mixture formed by mixing NPB and BCP according to the material ratio of 1:1 is used as the material of the first organic barrier layer, and the vacuum degree is 5×10 -5 Pa, evaporation rate 2 / s, thickness 250nm;

[0139] Fabrication of the first inorganic barrier layer: the Bi 2 Te 3 The mixture formed by mixing with CoFe according to the mass ratio of 1:9 is used as the material of the first inorganic barrier layer, which ...

Embodiment 3

[0144] An organic electroluminescent device is prepared through the following steps:

[0145] (1), (2), (3) are the same as embodiment 1;

[0146] (4) Prepare the encapsulation layer on the outside of the cathode:

[0147] The encapsulation layer includes three overlapping encapsulation layer units, and the encapsulation layer unit includes a first organic barrier layer, a first inorganic barrier layer, a second organic barrier layer, and a second inorganic barrier layer stacked in sequence;

[0148] Production of the first organic barrier layer: the mixture formed by mixing TAPC and TPBi according to the material ratio of 1:1 is used as the material of the first organic barrier layer, and the vacuum degree is 5×10 -5 Pa, evaporation rate 0.5 / s, thickness 200nm;

[0149] Production of the first inorganic barrier layer: the mixture formed by mixing CdTe and AlCr according to the mass ratio of 1:4 is used as the material of the first inorganic barrier layer, which is produc...

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Abstract

The invention aims to provide an organic light emitting device having an encapsulation layer structure. The encapsulation layer is of a composite structure formed by laminating encapsulation layer units. Each encapsulation layer unit comprises a first organic barrier layer, a first inorganic barrier layer, a second organic barrier layer and a second inorganic barrier layer which are stacked sequentially. Erosion of external active substances like water and oxygen to the organic light emitting device can be effectively prevented, and the service life of the organic light emitting device can be prolonged. The invention further provides a preparation method of the organic light emitting device. The preparation method has a simple process, adopts cheap raw materials, and is suitable for 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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IPC IPC(8): H01L51/52H01L51/54H01L51/56
CPCH10K50/8445H10K71/00
Inventor 周明杰钟铁涛冯小明王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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