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Organic light-emitting device and preparation method thereof

An electroluminescent device, electroluminescent technology, applied in the direction of electric solid device, semiconductor/solid state device manufacturing, electrical components, etc., can solve the problems of heavy device, loss of absorption ability of desiccant, easy to produce cracks, etc., to achieve continuous and dense Thin film, good step coverage and large area thickness uniformity, the effect of avoiding contamination

Inactive Publication Date: 2015-05-20
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

As the desiccant in the device absorbs a large amount of oxygen and water vapor, the desiccant loses its absorption capacity in a short period of time, resulting in the gradual accumulation of oxygen and water vapor in the device, which significantly reduces the life of the device; the glass cover usually used Or the metal cover plate is a brittle material, which is prone to cracks, and the resulting device will appear very heavy, which is not suitable for flexible 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

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Experimental program
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Effect test

Embodiment 1

[0054] figure 1 It is the schematic diagram of the organic electroluminescence device in embodiment 1; As figure 1 As shown, the organic electroluminescent device includes an ITO glass substrate (10), an organic light-emitting functional layer (20), a cathode (30) and an encapsulation layer (40) stacked sequentially from bottom to top; wherein the organic electroluminescent function The layer (20) includes a hole injection layer (21), a hole transport layer (22), a light emitting layer (23), an electron transport layer (24) and an electron injection layer (25) stacked in sequence from bottom to top. figure 2 yes figure 1 Schematic diagram of the structure of the encapsulation layer; such as figure 2 As shown, the encapsulation layer (40) includes an inorganic barrier layer (41) and an organic barrier layer (42) sequentially stacked on the surface of the cathode (30); more specifically, the inorganic barrier layer is first deposited on the surface of the cathode (30) (41),...

Embodiment 2

[0071] A method for preparing an organic electroluminescent device, comprising the steps of:

[0072] (1), (2), (3) are the same as embodiment 1;

[0073] (4) Preparation of encapsulation layer:

[0074] a) Preparation of inorganic barrier layer: The inorganic barrier layer was prepared on the surface of the cathode by atomic layer deposition (ALD), the working pressure was 50Pa, and the deposition temperature was 60°C; the material was chlorine-doped zirconia (ZrO 2 :Cl), the precursor used in the process of depositing the inorganic barrier layer is tetrakis(dichloromethylamino)zirconium[Zr(N(CH 2 Cl) 2 ) 4 ] and water vapor, tetrakis(dichloromethylamino)zirconium[Zr(N(CH 2 Cl) 2 ) 4 ] injection time is 1s, water vapor injection time is 40ms, and nitrogen gas (N 2 ), tetrakis(dichloromethylamino)zirconium[Zr(N(CH 2 Cl) 2 ) 4 ], water vapor and nitrogen (N 2 ) flow rate is 20sccm, the thickness of the inorganic barrier layer is 19nm;

[0075] b) Preparation of the ...

Embodiment 3

[0079] A method for preparing an organic electroluminescent device, comprising the steps of:

[0080] (1), (2), (3) are the same as embodiment 1;

[0081] (4) Preparation of encapsulation layer:

[0082] a) Preparation of inorganic barrier layer: The inorganic barrier layer was prepared on the surface of the cathode by atomic layer deposition (ALD), the working pressure was 40Pa, the deposition temperature was 55°C; the material was chlorine-doped hafnium oxide (HfO 2 :Cl), the precursor used in the deposition of the inorganic barrier layer is tetrakis(dichloromethylamino)hafnium [Hf(N(CH 2 Cl) 2 ) 4 ] and water vapor, tetrakis(dichloromethylamino) hafnium [Hf(N(CH 2 Cl) 2 ) 4 ] injection time is 0.2s, water vapor injection time is 20ms, and nitrogen gas (N 2 ), tetrakis(dichloromethylamino) hafnium [Hf(N(CH 2 Cl) 2 ) 4 ], water vapor and nitrogen (N 2 ) flow rate is 10sccm, the thickness of the inorganic barrier layer is 15nm;

[0083] b) Preparation of organic ba...

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Abstract

The invention provides an organic light-emitting device. The organic light-emitting device comprises an anode conductive substrate, an organic light-emitting functional layer, a cathode and a packaging layer in sequentially overlapped arrangement. The packaging layer comprises inorganic barrier layers and organic barrier layers, and the inorganic barrier layers and the organic barrier layers are sequentially overlapped on the surface of the cathode. The inorganic barrier layers are made of TiO2:Cl, ZrO2:Cl or HfO2:Cl. The organic barrier layers are made of loop-chain borane with a structural formula shown in the original text, wherein R1 refers to same or different naphthene bases, branched alkyls or straight-chain alkyls with carbon number being 1-6, l refers to an integer ranging from 1 to 10, m refers to an integer ranging from 5 to 15, and n refers to an integer ranging from 0 to m-1. The packaging layer is high in compactness, so that service lives of devices, especially flexible devices, can be prolonged to be longer than 11500 hours (T701000cd / m<2>). The invention further provides a preparation method of the organic light-emitting device.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescent devices, in particular to an organic electroluminescent device and a preparation method thereof. Background technique [0002] Currently, organic electroluminescent devices (OLEDs) suffer from a short lifetime, which is mainly caused by the intrusion of oxygen and water vapor. On the one hand, oxygen is a quencher, which will significantly reduce the quantum efficiency of luminescence. At the same time, oxygen will oxidize the luminescent layer, and the carbonyl compound produced is also an effective quencher; on the other hand, the influence of water vapor is more obvious, it The main way of destruction is to make the organic compound in the device hydrolyze, and also react with the metal cathode, which greatly reduces its stability, resulting in device failure and reduced service life. Therefore, in order to effectively suppress the degradation and failure of organic electrol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/52H01L51/54H01L51/56
CPCH10K50/00H10K50/84H10K71/00
Inventor 周明杰钟铁涛王平冯小明
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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