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Organic electroluminescent device and preparation method thereof

An electroluminescent device and luminescence 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 total reflection loss, low light output, low luminous efficiency of devices, etc.

Inactive Publication Date: 2014-10-29
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In a traditional organic electroluminescent device, only about 18% of the light inside the device can be emitted to the outside, while the other part will be consumed outside the device in other forms, and there is a difference in refractive index between the interfaces (such as glass The difference between the refractive index and ITO, the refractive index of glass is 1.5, and ITO is 1.8, and the light from ITO to the glass will undergo total reflection), causing the loss of total reflection, resulting in a lower overall light output, resulting in a device low luminous efficiency

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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preparation example Construction

[0054] Such as figure 2 The preparation method of the above-mentioned organic electroluminescence device shown, comprises the following steps:

[0055] S10 , performing surface pretreatment on the conductive anode substrate 10 .

[0056] The conductive anode substrate 10 can be indium tin oxide glass (ITO), aluminum zinc oxide glass (AZO) or indium zinc oxide glass (IZO). In a preferred embodiment, the conductive anode substrate 10 is indium tin oxide glass (ITO).

[0057] The thickness of the conductive layer of the anode conductive substrate 10 may be 80nm˜150nm.

[0058] The operation of surface pretreatment can be as follows: first carry out photolithographic treatment on the conductive anode substrate 10, cut it into the required size, and then use detergent, deionized water, acetone, ethanol and isopropanol to ultrasonically clean it for 15 minutes respectively to remove the conductive material. Organic pollutants on the surface of the anode substrate 10 .

[0059] ...

Embodiment 1

[0086] An organic electroluminescent device, comprising a conductive anode substrate, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, a metal sulfide doped layer, a phthalocyanine metal compound doped The mixed layer and metal sulfide layer, the specific structure is expressed as: ITO glass / WO 3 / NPB / Alq 3 / TAZ / LiF / ZnS:Ag (1:1) / CuPc:Ag (1.2:1) / ZnS. The preparation steps are:

[0087] Provide ITO glass with a conductive layer thickness of 100nm, and ultrasonically clean the ITO glass with detergent and deionized water for 15 minutes in order to remove organic pollutants on the glass surface.

[0088] The working pressure is 8×10 -5 Under the condition of Pa, the evaporation rate of organic materials is 0.2nm / s, and the evaporation rate of metals and metal compounds is 3nm / s. The hole injection layer, the hole transport layer, and the light emitting layer are sequentially evaporated on the ITO g...

Embodiment 2

[0092] An organic electroluminescent device, comprising a conductive anode substrate, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, a metal sulfide doped layer, a phthalocyanine metal compound doped Hybrid layer and metal sulfide layer, the specific structure is expressed as: AZO glass / MoO 3 / TCTA / ADN / TAZ / CsF / CdS:Al (0.5:1) / ZnPc:Pt (1:1) / MgS. The preparation steps are:

[0093] AZO glass with a conductive layer thickness of 80nm is provided, and the AZO glass is ultrasonically cleaned with detergent and deionized water for 15 minutes in order to remove organic pollutants on the glass surface.

[0094] The working pressure is 2×10 -3 Under the condition of Pa, the evaporation rate of organic materials is 0.1nm / s, and the evaporation rate of metals and metal compounds is 10nm / s, and the hole injection layer, the hole transport layer, and the light emitting layer are sequentially evaporated on t...

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Abstract

The invention discloses an organic electroluminescent device comprising a conductive anode substrate, a hole injection layer, a hole transporting layer, a light emitting layer, an electron transporting layer, an electron injection layer, a metal sulfide doped layer, a phthalocyanines metal compound doped layer and a metal sulfide layer which are stacked in sequence. The metal sulfide layer of the organic electroluminescent device is made of a metal sulfide having a refractive index of 1.8 to 2.0. Reflective light of the metal sulfide goes back into the phthalocyanines metal compound doped layer so as to encounter transmitted light in the phthalocyanines metal compound doped layer to achieve interference enhancement and improve light emitting intensity. Compared with a conventional organic electroluminescent device, the organic electroluminescent device is higher in light emitting efficiency. The invention further discloses a preparation method of the organic electroluminescent device.

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] In 1987, C.W.Tang and Van Slyke of Eastman Kodak Company in the United States reported a breakthrough in the research of organic electroluminescence. A high-brightness, high-efficiency double-layer organic electroluminescent device (OLED) has been prepared using ultra-thin film technology. In the device with double-layer structure, the luminance reaches 1000cd / m2 at 10V, the luminous efficiency is 1.51lm / W, and the lifetime is more than 100 hours. [0003] The principle of OLED light emission is based on the action of an external electric field, electrons are injected from the cathode to the lowest unoccupied molecular orbital (LUMO) of organic matter, and holes are injected from the conductive anode substrate to the highest occupied orbital (HOMO) of organic matter. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52H01L51/54H01L51/56
CPCH10K50/828H10K50/854H10K50/856
Inventor 周明杰黄辉张振华王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD