Organic electroluminescent device and preparation method thereof

An electroluminescent device and a luminescent technology, which are applied in the fields of electric solid-state devices, semiconductor/solid-state device manufacturing, electrical components, etc., can solve organic functional layer damage, poor film-forming properties 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

[0034] The preparation method of the organic electroluminescent device 100 according to an embodiment includes the following steps:

[0035] In step S110 , 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 are sequentially formed on the surface of the anode 10 .

[0036] 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, the thickness of the anode 10 It is 50 nm to 300 nm, preferably 110 nm.

[0037] In this embodiment, before the hole injection layer 20 is formed on the surface of the anode 10, the anode 10 is pre-treated. The pre-treatment includes: subjecting the anode 10 to photolithography, cutting it into a required size, using detergent, deionization Water, acetone, ethanol, and isoacetone were each ultrasonically cleaned for 15 minutes to remove...

Embodiment 1

[0052] Structure ITO / MoO prepared in this example 3 / NPB / Alq 3 / Bphen / RbCl:Bphen / FeCl 3 : 2,6Dczppy / Ag organic electroluminescent device, in this embodiment and the following embodiments, " / " indicates a layer, and ":" indicates doping.

[0053] Magnetron sputtering anode on glass substrate, the material is ITO, and then photolithographic processing, cut to the required size, followed by detergent, deionized water, acetone, ethanol, isopropanol and ultrasonic for 15min each to remove the glass surface After cleaning, conduct appropriate treatment on the conductive substrate: oxygen plasma treatment, treatment time is 5min, power is 30W; thickness is 80nm, hole injection layer is evaporated, and the material is MoO 3 , the thickness is 25nm; the vapor-deposited hole transport layer is made of NPB and the thickness is 55nm; the vapor-deposited light-emitting layer is made of Alq 3 , the thickness is 16nm; the electron transport layer is evaporated, the material is Bphen, and ...

Embodiment 2

[0060] The structure prepared in this example is ITO / V 2 O 5 / NPB / DCJTB / TPBi / Rb 2 CO 3 :Alq 3 / FeBr 3 : Organic electroluminescent devices of TRZ4 / Au.

[0061] Magnetron sputtering anode on glass substrate, the material is ITO, and then photolithography treatment, cut to the required size, followed by detergent, deionized water, ultrasonic for 15min, to remove organic pollutants on the glass surface; Hole injection layer: material is V 2 O 5 , the thickness is 40nm; the vapor-deposited hole transport layer: the material is NPB, the thickness is 45nm; the vapor-deposited light-emitting layer: the selected material is DCJTB, the thickness is 8nm; the vapor-deposited electron transport layer, the material is TPBi, the thickness is 65nm; The injection layer includes a rubidium compound doped layer and an iron salt doped layer, and the rubidium compound doped layer is deposited by thermal resistance evaporation, and the material is Rb 2 CO 3 :Alq 3 , Rb 2 CO 3 with Alq ...

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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 rubidium compound doped layer and a ferric salt doped layer. The rubidium compound doped layer includes a rubidium compound material group and an electron transport material doped in the rubidium compound material. The rubidium compound material includes at least one selected from rubidium carbonate, rubidium chloride, rubidium nitrate, and rubidium sulfate. The electron transport material includes at least one selected from 4,7-diphenyl-1,10-phenanthroline, 2-(4'-tert-butylphenyl)-5-(4'-biphenyl)-1,3,4-oxadiazole, 8-hydroxyquinoline aluminum, and N-arylbenzimidazole. The ferric salt doped layer includes a ferric salt material and a bipolar organic transport material doped in the ferric salt material. The ferric salt material includes at least one selected from ferric chloride, ferric bromide and ferric sulfide.

Description

technical field [0001] The present invention relates to an organic electroluminescence device and a preparation method thereof. Background technique [0002] The light-emitting principle of organic electroluminescence devices is based on the fact that under the action of an external electric field, electrons are injected from the cathode to the lowest unoccupied molecular orbital (LUMO) of organic matter, while 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. The excitons migrate under the action of the electric field, transfer energy to the light-emitting material, and excite the electrons to transition from the ground state to the excited state. The energy of the excited state is deactivated by radiation to generate photons. , releasing light energy. [0003] The electron injection layer of traditional organic electroluminescent devices ...

Claims

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Application Information

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IPC IPC(8): H01L51/52H01L51/54H01L51/56
Inventor 周明杰黄辉陈吉星王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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