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Organic electroluminescent device and preparation method thereof

An electroluminescent device and luminescent technology, which is applied in the direction of electric solid-state devices, semiconductor/solid-state device manufacturing, electrical components, etc., can solve the problems of easy cracks, reduced lifespan of organic electroluminescent devices, thick and heavy organic electroluminescent devices, etc. problem, to achieve the effect of high density

Inactive Publication Date: 2015-09-02
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 organic electroluminescent device absorbs a large amount of oxygen and water vapor, the desiccant loses its absorption capacity in a short time, resulting in the gradual accumulation of oxygen and water vapor in the organic electroluminescent device, thus making the organic electroluminescent device The life of the organic electroluminescent device is significantly reduced; the glass cover plate or metal cover plate usually used is a brittle material, which is prone to cracks, and the obtained organic electroluminescent device will appear very thick and heavy, which is not suitable for flexible organic electroluminescent devices.

Method used

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  • Organic electroluminescent device and preparation method thereof
  • Organic electroluminescent device and preparation method thereof
  • Organic electroluminescent device and preparation method thereof

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Experimental program
Comparison scheme
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 a first inorganic barrier layer (41) and a second inorganic barrier layer (42) sequentially stacked on the surface of the cathode (30); more specifically, the first inorganic barrier layer (42) is deposited on the surface of the c...

Embodiment 2

[0073] A method for preparing an organic electroluminescent device, comprising the steps of:

[0074] (1), (2), (3) are the same as embodiment 1;

[0075] (4) Preparation of encapsulation layer:

[0076] a) Preparation of the first inorganic barrier layer: the first inorganic barrier layer was prepared on the surface of the cathode by atomic layer deposition (ALD), the working pressure was 10 Pa, and the deposition temperature was 40 °C; the material was iodine-doped zirconia (ZrO 2 : I), the mass fraction of iodine doping is 8%, and the precursor adopted in the process of depositing the first inorganic barrier layer is tetrakis (diiodomethylamino) zirconium [Zr(N(CH 2 I) 2 ) 4 ] and water vapor, tetrakis(diiodomethylamino)zirconium[Zr(N(CH 2 I) 2 ) 4 ] injection time is 1s, water vapor injection time is 40ms, and nitrogen gas (N 2 ), four (diiodomethylamino) zirconium [Zr (N (CH 2 I) 2 ) 4 ], water vapor and nitrogen (N 2 ) flow rate is 20sccm, the thickness of the...

Embodiment 3

[0081] A method for preparing an organic electroluminescent device, comprising the steps of:

[0082] (1), (2), (3) are the same as embodiment 1;

[0083] (4) Preparation of encapsulation layer:

[0084] a) Preparation of the first inorganic barrier layer: the first 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 iodine-doped hafnium oxide (HfO 2 : I), the mass fraction of iodine doping is 25%, and the precursor used in the process of depositing the first inorganic barrier layer is tetrakis(diiodomethylamino) hafnium [Hf(N(CH 2 I) 2 ) 4 ] and water vapor, tetrakis(diiodomethylamino) hafnium [Hf(N(CH 2 I) 2 ) 4 ] injection time is 0.2s, water vapor injection time is 20ms, and nitrogen gas (N 2 ), tetrakis(diiodomethylamino) hafnium [Hf(N(CH 2 I) 2 ) 4 ], water vapor and nitrogen (N 2 ) flow rate is 10sccm, the thickness of the ...

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Abstract

The invention discloses an organic electroluminescent device which comprises the components of an anode conductive substrate, an organic light emitting functional layer, a cathode and a packaging layer; wherein the organic light emitting functional layer, the cathode and the packaging layer are successively laminated on the anode conductive substrate. The packaging layer comprises a first inorganic barrier layer and a second inorganic barrier layer which are successively laminated on the surface of the cathode. The first inorganic barrier layer is made of bromine-doped titanium oxide, bromine-doped zirconia, iodine-doped titanium oxide, iodine-doped zirconia or iodine-doped hafnium oxide. The second inorganic barrier layer is made of silicon oxide, alumina, titanium oxide, zirconia, hafnium oxide, tantalum oxide, silicon nitride, aluminum nitride, boron nitride, vanadium nitride, tantalum nitride or titanium nitride. The packaging layer of the invention has high compactness, thereby prolonging service life of the organic electroluminescent device, particularly a flexible organic electroluminescent device. The invention further provides a preparation method for the organic electroluminescent 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 hydrolyze the organic compound in the organic electroluminescent device, and also react with the metal cathode, which greatly reduces its stability, which leads to the failure of the organic electroluminescent device and reduces the service life. Therefore, in order to ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/52H01L51/54H01L51/56
CPCH10K50/00H10K50/84H10K50/844H10K71/00
Inventor 周明杰钟铁涛王平陈吉星
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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