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
CN104659243AInactive Publication Date: 2015-05-27OCEANS KING LIGHTING SCI&TECH CO LTD +2
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
OCEANS KING LIGHTING SCI&TECH CO LTD
Publication Date
2015-05-27
Estimated Expiration
Not applicable ยท inactive patent

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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.
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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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