Organic electroluminescent device and preparation method thereof

An electroluminescent device and luminescence technology, which is applied in the direction of organic light-emitting devices, organic light-emitting device structures, organic semiconductor devices, etc., can solve the problems of organic layer damage, low luminous efficiency, easy quenching, etc.
CN104518138AInactive Publication Date: 2015-04-15OCEANS KING LIGHTING SCI&TECH CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
OCEANS KING LIGHTING SCI&TECH CO LTD
Publication Date
2015-04-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides an organic electroluminescent device. The organic electroluminescent device comprises an anode, a cavity implantation layer, a cavity transmission layer, a luminescent layer, an electron transmission layer, an electron injecting layer and a cathode which are successively stacked. A cathode layer is composed of a metal sulfide doping layer, an organic electron transmission layer and a film material layer. The material of the metal sulfide doping layer comprises metal sulfide and metal doped in the metal sulfide. An organic electron transmission doping layer comprises an organic electron transmission material and titanium dioxide doped in the organic electron transmission material. The material of the organic electron transmission doping layer is selected from at least one from 2,2'-(1,3-pheyl)bis[5-(4- tert-butyl phenyl)-1,3,4-oxadiazol], 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline and 2,8-bis(diphenylphosphinoxy) dibenzo[b,d] thiophene. The material of the film material layer is selected from at least one from an indium tin oxide target material, an aluminum zinc oxide target material and an indium zinc oxide target material.
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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 cathodes of traditional organic electroluminescent devices are generally silver (Ag), gold (Au) and other metals. After prepa...

Claims

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