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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 electro-solid devices, semiconductor/solid-state device manufacturing, electrical components, etc., and can solve the problems of small driving current, low device life, and large driving current of light-emitting devices.

Inactive Publication Date: 2014-09-17
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] So far, although researchers from all over the world have greatly improved the performance indicators of the device by selecting suitable organic materials and reasonable device structure design, due to the large current driving the light-emitting device, The luminous efficiency is low and the device life is low. In order to realize the practical application of organic electroluminescent devices, people are eager to find a light-emitting device structure with small driving current and high luminous efficiency.

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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preparation example Construction

[0057] see figure 2 , the preparation method of the organic electroluminescent device of an embodiment, comprises the following steps:

[0058] Step S110: providing a substrate, and forming an anode on the substrate by vacuum sputtering.

[0059] The substrate is preferably a transparent glass substrate. The anode is formed on a transparent glass substrate by vacuum sputtering.

[0060] The anode is formed of indium tin oxide (ITO), indium zinc oxide (IZO), aluminum zinc oxide (AZO), or gallium zinc oxide (GZO). The thickness of the anode is 70-200 nanometers.

[0061] The vacuum degree of vacuum sputtering is 5×10 -4 Pa.

[0062] Step S120: Forming a first light-emitting functional layer on the anode by vacuum evaporation.

[0063] The first light-emitting functional layer includes a first hole injection layer, a first hole transport layer, a first light-emitting layer and a first hole blocking layer sequentially stacked on the anode.

[0064] The first hole injection...

Embodiment 1

[0099] The structure is Glass / ITO / CuPc / NPB / DCJTB:Alq 3 / TPBi / LiN 3 :TPBi / HAT-CN / ReO 3 :NPB / NPB / DCJTB:Alq 3 Fabrication of Organic Electroluminescent Devices Based on / TPBi / Ag

[0100] (1) Provide transparent glass as the substrate, denoted as Glass. Put the transparent glass in deionized water containing detergent for ultrasonic cleaning. After cleaning, use isopropanol and acetone in ultrasonic treatment for 20 minutes, and then blow dry with nitrogen;

[0101] (2) Vacuum sputtering is used to form an anode on the cleaned and dried transparent glass. Vacuum degree is 5×10 -4 Pa. The anode is formed of indium tin oxide (ITO). The thickness of the anode is 100nm;

[0102] (3) A first hole injection layer, a first hole transport layer, a first light emitting layer and a first hole blocking layer are sequentially formed on the anode by vacuum evaporation. Vacuum degree is 5×10 -4Pa. The first hole injection layer is formed of copper phthalocyanine (CuPc), and the thick...

Embodiment 2

[0108] The structure is Glass / IZO / ZnPc / TPD / C545T:Alq 3 / PBD / CsN 3 :Bphen / F 4 -TCNQ / WO 3 :MeO-TPD / TPD / C545T:Alq 3 Preparation of Organic Electroluminescent Devices Based on / Bphen / Al

[0109] (1) Provide transparent glass as the substrate, denoted as Glass. Put the transparent glass in deionized water containing detergent for ultrasonic cleaning. After cleaning, use isopropanol and acetone in ultrasonic treatment for 20 minutes, and then blow dry with nitrogen;

[0110] (2) Vacuum sputtering is used to form an anode on the cleaned and dried transparent glass. Vacuum degree is 5×10 -4 Pa. The material of the anode is indium zinc oxide (IZO). The thickness of the anode is 70nm;

[0111] (3) A first hole injection layer, a first hole transport layer, a first light emitting layer and a first hole blocking layer are sequentially formed on the anode by vacuum evaporation. Vacuum degree is 5×10 -4 Pa. The first hole injection layer is formed of zinc phthalocyanine (ZnPc), ...

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Abstract

The invention provides an organic light-emitting device and a preparation method thereof. The device comprises a substrate, an anode, a first light emitting function layer, a charge generation layer, a second light emitting function layer and a cathode, wherein the components are successively stacked. The charge generation layer includes an n type layer, an intermediate layer, and a p type layer; the n type layer is formed by doping lithium carbonate, lithium azide, cesium azide or cesium carbonate in an electron transport material; the intermediate layer is formed by 2,3,5,6-tetrafluoro-7,7'8,8'-tetracyanoquino-dimethane, 1,3,4,5,7,8-hexafluoro-tetracyano-dimethyl-p-naphthoquinone, 2,2'-(2,5-dicyano-3,6-difluoro cyclohexane-2,5-diene-1,4-diylidene) dimalononitrile, or 2,3,6,7,10,11-hexacyano-1,4,5,8,9,12,-hexaazatriphenylene; and the p type layer is formed by doping rhenium trioxide, vanadium pentoxide, molybdenum oxide, or tungsten trioxide in a hole transport material. The provided device has advantages of low driving current and high luminous efficiency.

Description

technical field [0001] The invention relates to the technical field of light emission, in particular to an organic electroluminescence device and a preparation method thereof. Background technique [0002] Organic Light Emission Diode, hereinafter referred to as OLED, has the characteristics of high brightness, wide range of material selection, low driving voltage, fully cured active light emission, etc., and has the advantages of high definition, wide viewing angle, and fast response speed. It is a display technology and light source with great potential, which conforms to the development trend of mobile communication and information display in the information age, as well as the requirements of green lighting technology, and is the focus of many researchers at home and abroad. [0003] So far, although researchers from all over the world have greatly improved the performance indicators of the device by selecting suitable organic materials and reasonable device structure de...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/54H01L51/56
CPCH10K71/166H10K85/631H10K85/324
Inventor 周明杰王平冯小明张娟娟
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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