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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 low luminous efficiency, improve luminous efficiency, improve electrical conductivity, and improve film layer efficiency. effect of density

Inactive Publication Date: 2014-12-31
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

However, the luminous efficiency of organic electroluminescent devices is low at present

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

Examples

Experimental program
Comparison scheme
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preparation example Construction

[0036] Please also see figure 2 , the preparation method of the organic electroluminescent device 100 of an embodiment, it comprises the following steps:

[0037] Step S110 , sequentially vapor-depositing the hole injection layer 20 , the first hole transport layer 32 , the first light emitting layer 34 and the first electron transport layer 36 on the surface of the anode.

[0038] The anode 10 is indium tin oxide glass (ITO), aluminum zinc oxide glass (AZO) or indium zinc oxide glass (IZO), preferably ITO.

[0039] In this embodiment, before the hole injection layer 20 is formed on the surface of the anode 10, the anode 10 is pretreated. The pretreatment includes: performing photolithography on the anode 10, cutting it into the required size, using detergent, deionized Water, acetone, ethanol, and isopropanone were each ultrasonically cleaned for 15 minutes to remove organic pollutants on the surface of the anode 10 .

[0040] The hole injection layer 20 is formed on the s...

Embodiment 1

[0056] The structure prepared in this example is ITO / MoO 3 / TCTA / Alq 3 / TAZ / HfO 2 :ZnO:Ag / TCTA / Alq 3 / TPBI / Cs 2 CO 3 / Ag organic electroluminescent device Wherein, " / " indicates a stacked structure, ":" indicates doping or mixing, and the following embodiments are the same.

[0057] First carry out photolithography treatment on ITO, cut it into the required size, and then use detergent, deionized water, acetone, ethanol, and isopropanol to sonicate for 15 minutes each to remove organic pollutants on the glass surface; evaporate the hole injection layer , the material is MoO3, the thickness is 40nm; evaporate the first hole transport layer, the material is TCTA, the thickness is 50nm; evaporate the first light-emitting layer, the material is Alq3, the thickness is 10nm; evaporate the first electron transport layer, the material It is TAZ with a thickness of 120nm; the material of the evaporated charge generation layer is HfO2:ZnO:Ag, the thickness of the charge generation ...

Embodiment 2

[0062] The structure prepared in this example is AZO / WO 3 / TCTA / ADN / TAZ / HfB 2 :ZrO 2 :Al / TAPC / ADN / TAZ / CsN 3 / Pt organic electroluminescent devices.

[0063] First, the AZO glass substrate was washed with detergent, deionized water, and ultrasonic for 15 minutes to remove organic pollutants on the glass surface; the hole injection layer was prepared by evaporation, and the material was WO 3 , the thickness is 80nm; the first hole transport layer is prepared by evaporation, the material is TCTA, and the thickness is 60nm; the first light-emitting layer is prepared by evaporation, the material is ADN, and the thickness is 5nm; the first electron transport layer is prepared by evaporation, and the material is TAZ, the thickness is 200nm; the vapor deposition charge generation layer material is HfB 2 :ZrO 2 : Al, charge generation layer thickness 5nm, ZrO 2 The mass ratio to Al is 1:5, HfB 2 The mass ratio to Al is 1:100; the second hole transport layer is prepared by evapor...

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Abstract

The invention relates to an organic electroluminescent device comprising an anode, a hole injection layer, a first hole transport layer, a first luminous layer, a first electron transfer layer, a charge generating layer, a second hole transport layer, a second luminous layer, a second electron transport layer, an electron injection layer and a cathode. The components are successively laminated. Materials employed by the charge generating layer includes metal, a hafnium compound, and metallic oxide, wherein the hafnium compound and the metallic oxide are doped in the metal, the mass ratio of the metallic oxide to the metal is 1:20 to 1:5, and the mass ratio of the hafnium compound to the metal is 1:100 to 1: 20. The luminous efficiency of the organic electroluminescent device is high. In addition, the invention also provides a preparation method of the organic electroluminescent device.

Description

technical field [0001] The invention relates to an organic electroluminescence device and a preparation method thereof. Background technique [0002] The luminescence principle of organic electroluminescent devices 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 anode to the highest occupied molecular orbital (HOMO) of organic matter. Electrons and holes meet, recombine, and form excitons in the light-emitting layer. Excitons migrate under the action of an electric field, transfer energy to the light-emitting material, and excite electrons to transition from the ground state to the excited state. The excited state energy is deactivated by radiation to generate photons , releasing light energy. However, the luminous efficiency of organic electroluminescent devices is relatively low at present. Contents of the invention [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/54H01L51/56
CPCH10K71/164H10K50/155H10K50/11H10K50/858H10K50/86H10K71/00
Inventor 周明杰黄辉张振华王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD