Organic electroluminescent 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., can solve the damage of organic functional layers, poor film formation of lithium fluoride, and reduce the probability of electron and hole recombination And other issues

Inactive Publication Date: 2015-05-27
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] The electron injection layer of traditional organic electroluminescent devices generally uses lithium fluoride, but because the melting point of lithium fluoride is too high, a large current must be used for evaporation during evaporation, and the evaporation room of the organic evaporation room is too high , will damage other organic functional layers, and the film-forming property of lithium fluoride is poor, and it is easy to form electron defects, resulting in the quenching of electrons and reducing the recombination probability of electrons and holes

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

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preparation example Construction

[0036] The preparation method of the organic electroluminescence device 100 of an embodiment, it comprises the following steps:

[0037] Step S110 , sequentially forming a hole injection layer 20 , a hole transport layer 30 , a light emitting layer 40 , an electron transport layer 50 and an electron injection layer 60 on the surface of the anode 10 .

[0038] The anode 10 is indium tin oxide glass (ITO), fluorine-doped tin oxide glass (FTO), aluminum-doped zinc oxide glass (AZO) or indium-doped zinc oxide glass (IZO), preferably ITO, with a thickness of 100 nm.

[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 .

...

Embodiment 1

[0054] The structure prepared in this example is ITO / MoO 3 / NPB / Alq 3 / Bphen / FeCl 3 / MoO 3 :BCzVBi:Zn / FeBr 3 / Ag organic electroluminescent devices.

[0055] 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; clean the conductive substrate Appropriate treatment: oxygen plasma treatment, the treatment time is 5min, the power is 30W; the hole injection layer is evaporated, and the material is MoO 3 , with a thickness of 60nm; evaporated hole transport layer, made of NPB, with a thickness of 50nm; evaporated luminescent layer, made of BCzVBi, with a thickness of 30nm; evaporated electron transport layer, made of Bphen, with a thickness of 160nm; evaporated electron The injection layer, the electron injection layer is composed of the first iron salt layer, the ternary doped layer and the s...

Embodiment 2

[0061] The structure prepared in this example is IZO / V 2 o 5 / TCTA / DCJTB / TPBi / FeBr 3 / WO 3 :DCJTB:Zn / Fe 2 S 3 / Al organic electroluminescent devices.

[0062] First, use detergent, deionized water, and ultrasound on the IZO glass substrate for 15 minutes to remove organic pollutants on the glass surface; evaporate the hole injection layer: the material is V 2 o 5 , with a thickness of 40nm; evaporated hole transport layer: the material is TCTA, with a thickness of 45nm; evaporated luminescent layer: the selected material is DCJTB, with a thickness of 8nm; evaporated electron transport layer, the material is TPBi, with a thickness of 65nm; evaporated The electron injection layer is plated. The electron injection layer is composed of the first iron salt layer, the ternary doped layer and the second iron salt layer. The first iron salt layer is prepared on the surface of the electron transport layer by thermal resistance evaporation, and the material is FeBr 3 , with a thi...

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Abstract

An organic electroluminescent device comprises an anode, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, and a cathode, which are stacked in sequence. The electron injection layer is composed of a first ferric salt layer, a ternary doped layer, and a second ferric salt layer. The first ferric salt layer and the second ferric salt layer are made of at least one material selected from ferric chloride, ferric bromide and ferric sulfide. The ternary doped layer is composed of a bipolar metal oxide material, a luminescent material and zinc powder. The bipolar metal oxide material includes at least one selected from molybdenum trioxide, tungsten trioxide and vanadium pentoxide. The luminescent material includes at least one selected from 4-(dinitrile methyl)-2-butyl-6-(1,1,7,7-tetramethyljulolidine-9-vinyl)-4H-pyrans, 9,10-di-beta-naphthylene anthracene, 4,4'-bis(9-ethyl-3-carbazole vinyl)-1,1'-biphenyl and 8-hydroxyquinoline aluminum.

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. [0003] The electron injection layer of traditional organic electroluminescent devices generally uses lithium fluoride, but because the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/54H01L51/52H01L51/56
CPCH10K50/171H10K71/00
Inventor 周明杰黄辉陈吉星王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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