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Organic electroluminescent light emitting device and preparation method thereof

An electroluminescent device and luminescent technology, which is applied in the fields of electric solid-state devices, semiconductor/solid-state device manufacturing, electrical components, etc., can solve the problems of reduced luminous efficiency and low probability of exciton recombination

Inactive Publication Date: 2015-09-23
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

[0003] In the field of traditional organic electroluminescence, the electron transport rate is two or three orders of magnitude lower than the hole transport rate, so it is very easy to cause the low probability of exciton recombination, and the area where the recombination is not in the light-emitting area, resulting in luminescence Reduced efficiency

Method used

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

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preparation example Construction

[0051] Such as figure 2 The preparation method of the above-mentioned organic electroluminescence device shown, comprises the following steps:

[0052] S10 , performing surface pretreatment on the substrate 10 .

[0053] The substrate 10 is glass. Generally speaking, ordinary glass will do. In special application fields, special glass made by special process can also be selected.

[0054] The surface pretreatment process specifically includes: after the substrate 10 is rinsed with distilled water and ethanol in sequence, it is soaked in isopropanol overnight.

[0055] S20 , preparing the anode 15 on the substrate 10 by magnetron sputtering.

[0056] The anode 15 can be an indium tin oxide film (ITO), an aluminum-doped zinc oxide film (AZO) or an indium-doped zinc oxide film (IZO), and the thickness of the anode 15 is 50nm-300nm. In a preferred embodiment, the anode 15 is an indium tin oxide film (ITO), and the thickness of the anode 15 is 110 nm.

[0057] The accelerati...

Embodiment 1

[0080] An organic electroluminescent device, comprising a substrate, an anode, a hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting layer, a hole blocking layer, an electron transport layer, an electron injection layer and a cathode stacked in sequence, the specific structure Expressed as: glass / ITO / MoO 3 / NPB / UGH2: CuPc / Alq 3 / Re 2 o 7 :(Ir(ppy) 3 / TPBI / Cs 2 CO 3 / Ag.

[0081] The preparation steps are:

[0082] Provide a commercially available common glass, rinse the glass with distilled water and ethanol in sequence, and soak it in isopropanol overnight.

[0083] The anode was prepared by magnetron sputtering on the surface-treated glass surface. The material of the anode is ITO, and the thickness is 110nm. The acceleration voltage of magnetron sputtering is 700V, the magnetic field is 120G, and the power density is 25W / cm 2 .

[0084] The working pressure is 8×10 -4 Under the condition of Pa, according to the vapor deposi...

Embodiment 2

[0090] An organic electroluminescent device, comprising a substrate, an anode, a hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting layer, a hole blocking layer, an electron transport layer, an electron injection layer and a cathode stacked in sequence, the specific structure Expressed as: Glass / AZO / V 2 o 5 / NPB / UGH1: ZnPc / BCzVBi / ReO 2 : FIrpi / TAZ / LiF / Pt.

[0091] The preparation steps are:

[0092] Provide a commercially available common glass, rinse the glass with distilled water and ethanol in sequence, and soak it in isopropanol overnight.

[0093] The anode was prepared by magnetron sputtering on the surface-treated glass surface. The material of the anode is AZO with a thickness of 300nm. The acceleration voltage of magnetron sputtering is 300V, the magnetic field is 50G, and the power density is 40W / cm 2 .

[0094] The working pressure is 2×10 -3 Under the condition of Pa, the evaporation rate of organic materials is 1nm / s...

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Abstract

The present invention discloses an organic electroluminescent light emitting device which comprises a substrate, an anode, a hole injection layer, a hole transmission layer, an electron blocking layer, a light emitting layer, a hole blocking layer, an electron transmission layer, an electron injection layer and a cathode which are stacked in order. The material of the electron blocking layer is a mixture of an organic silicone small molecule and a phthalocyanine metal compound. The material of the hole blocking layer is a mixture of a rhenium compound and a phosphorescent material. An organic silicone small molecule energy level is wide, an LUMO energy level is high, the pass of electrons to one side of the hole can be effectively blocked, the phthalocyanine metal compound belongs to a crystalline compound, a chain segment can generate scattering for light, and the light emitting efficiency is improved. The HOMO energy level of the rhenium compound is low, the pass of electrons to one side of the cathode to be combined with the electrons can be effectively blocked, and the phosphorescent material has the advantages of good performance and stable light color. The light emitting efficiency can be effectively improved by the electron blocking layer and the hole blocking layer. The invention also discloses the preparation method of the organic electroluminescent light emitting 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. Brightness up to 1000cd / m at 10V 2 , its luminous efficiency is 1.51lm / W, and its lifespan is more than 100 hours. [0003] In the field of traditional organic electroluminescence, the electron transport rate is two or three orders of magnitude lower than the hole transport rate, so it is very easy to cause the low probability of exciton recombination, and the area where the recombination is not in the light-emitting area, resulting in luminescence Reduced efficiency. Contents of...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/54H01L51/52H01L51/56
Inventor 周明杰黄辉张振华王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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