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Organic electroluminescent device and preparation method thereof

An electroluminescent device and a luminescent technology, 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, achieve good film-forming performance, improve luminous efficiency, injection and transmission The effect of ability improvement

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 / TAPC / Alq 3 / TPBI / PC61BM:NPB:Ta 2 o 5 / NPB / 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 MoO 3 , the thickness is 40nm; evaporate the first hole transport layer, the material is TAPC, the thickness is 40nm; evaporate the first light-emitting layer, the material is Alq 3 , with a thickness of 10nm; the vapor-deposited first electron transport layer, the material is TPBI, and the thickness is 100nm; the vapor-deposited charge generation layer is made of PC61BM:NPB:Ta 2 o 5 , the charg...

Embodiment 2

[0062] The structure prepared in this example is AZO / WO 3 / TAPC / ADN / TAZ / C60:TCTA:Nb 2 o 5 / TCTA / ADN / Bphen

[0063] / Cs 3 / Pt organic electroluminescent devices.

[0064] 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 TAPC, 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 C60:TCTA:Nb 2 o 5 , the charge generation layer thickness is 30nm, C60 and Nb 2 o 5 The mass ratio of TCTA to Nb is 1:2 2 o 5 The mass ratio is 1:10; the second hole t...

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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. The charge generating layer is made of VB family oxide as well as a fullerene derivative and a hole transport material that are doped in the VB family oxide, wherein the mass ratio of the fullerene derivative to the VB family oxide is 1:10 to 1:2 and the mass ratio of the hole transport material to the VB family oxide is 1:10 to 2:5. 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): H01L51/52H01L51/54H01L51/56
CPCH10K71/164H10K85/215H10K50/155H10K50/11H10K71/00
Inventor 周明杰黄辉张振华王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD