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Electroluminescence device and its preparation method

A technology of electroluminescent devices and light-emitting layers, which is applied in the direction of electric solid-state devices, semiconductor/solid-state device manufacturing, and electrical components, and can solve the problems of high barriers of aluminum anodes and hole transport layers, so as to improve luminous efficiency and reduce potential Barrier, the effect of starting voltage reduction

Active Publication Date: 2015-10-28
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, an embodiment of the present invention provides an electroluminescent device, which solves the technical problem of high potential barrier between the aluminum anode and the hole transport layer in the prior art when metal aluminum is used as an anode in an OLED; and the electroluminescence Preparation method of light-emitting device

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  • Electroluminescence device and its preparation method
  • Electroluminescence device and its preparation method
  • Electroluminescence device and its preparation method

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preparation example Construction

[0039] The embodiment of the present invention further provides the above electroluminescent device preparation method, comprising the following steps:

[0040] Step S01, preparing an anode

[0041] Forming an aluminum anode on the substrate by vacuum evaporation, sputtering or spin coating to obtain a substrate containing an aluminum anode;

[0042] Step S02, preparing a modification layer

[0043] The perfluoro fatty acid is dissolved in hexadecane to form the first solution, the substrate containing the aluminum anode is soaked in the first solution, and dried with nitrogen flow to form a modified layer on the anode. The perfluoro fatty acid is passed through Formula is CF 3 (CF 2 ) n -COOH, wherein n is selected from any natural number from 2 to 14;

[0044] Step S03, preparing a hole transport layer

[0045] Forming a hole transport layer on the modification layer by vacuum evaporation, sputtering or spin coating;

[0046] Step S04, preparing a light-emitting layer...

Embodiment 1

[0065] The method for preparing an electroluminescent device according to an embodiment of the present invention includes the following steps:

[0066] Put the PET film with a thickness of 0.175mm in deionized water containing detergent for ultrasonic cleaning, then use isopropanol and acetone in ultrasonic treatment in turn, and dry it with nitrogen after completion;

[0067] On the surface of the flexible substrate, an Al film is formed by vacuum thermal evaporation, the thickness of the Al film is 60nm, and the substrate containing the aluminum film is obtained;

[0068] Perfluorobutyric acid (CF 3 (CF 2 ) 2 -COOH) was dissolved in hexadecane to make a solution with a concentration of 0.5mM, and then the prepared aluminum-containing film substrate was soaked in the solution for 10 minutes; after completion, it was taken out and dried with nitrogen, and formed on the aluminum film. retouching layer;

[0069] Forming a hole transport layer made of α-NPD and having a thick...

Embodiment 2

[0076] The method for preparing an electroluminescent device according to an embodiment of the present invention includes the following steps:

[0077] Put the PI film with a thickness of 0.15mm in deionized water containing detergent for ultrasonic cleaning, then use isopropanol and acetone in ultrasonic treatment in turn, and dry it with nitrogen after completion;

[0078] On the surface of the flexible substrate, an Al film is formed by vacuum thermal sputtering, the thickness of the Al film is 80nm, and the substrate containing the aluminum film is obtained;

[0079] Perfluorohexadecanoic acid (CF 3 (CF 2 ) 14 -COOH) was dissolved in hexadecane to make a solution with a concentration of 1mM, and then the prepared aluminum-containing film substrate was soaked in the solution for 8 minutes; after completion, it was taken out and dried with nitrogen to form a modified aluminum film. layer;

[0080] Forming a hole transport layer made of α-NPD and having a thickness of 20 ...

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Abstract

The invention is applicable to the field of photoelectric technology and provides an electroluminescent device and a preparation method thereof. The electroluminescent device comprises a substrate, an anode and a cathode which are positioned on the substrate, and a luminescent layer arranged between the anode and the cathode, wherein a hole transport layer and a modification layer are arranged between the anode and the luminescent layer; the modification layer is positioned between the hole transport layer and the anode; an electron injection layer and an electron transport layer are arranged between the cathode and the luminescent layer; the anode is made of aluminum; and the modification layer is made from perfluorinated fatty acid shown in the following chemical formula of CF3(CF2)n-COOH, wherein n is any natural number from 2-14. By using the perfluorinated fatty acid modification layer, the luminescence efficiency of the electroluminescent device is obviously improved; and the preparation method of the electroluminescent device is simple to operate, low in cost and high in production benefit, thus being very suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of optoelectronic technology, and in particular relates to an electroluminescent device and a preparation method thereof. Background technique [0002] Organic Light Emission Diode, referred to as OLED, has the characteristics of high brightness, wide range of material selection, low driving voltage, and full-cure active light emission. It also has the advantages of high definition, wide viewing angle, and fast response speed. The development trend of mobile communication and information display in the information age, as well as the requirements of green lighting technology, are the focus of many researchers at home and abroad. [0003] Among OLED devices in the prior art, OLED devices made of glass substrates do not have the feature of bending, and the glass is fragile, which affects the application of light emitting devices. OLED devices using flexible materials as substrates have the advantages of being thinner a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/52H01L51/50H01L51/56
Inventor 周明杰王平冯小明陈吉星
Owner OCEANS KING LIGHTING SCI&TECH CO LTD