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Organic light-emitting device and making method thereof

An electroluminescent device and electroluminescent technology, which are applied in the directions 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.

Inactive Publication Date: 2015-04-15
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 cathode of traditional organic electroluminescent devices is generally made of silver (Ag), gold (Au) and other metals. After preparation, the cathode is very easy to penetrate into the organic layer, causing damage to the organic layer, and the electrons are easily quenched near the cathode, so that the luminous efficiency lower

Method used

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  • Organic light-emitting device and making method thereof
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  • Organic light-emitting device and making method thereof

Examples

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preparation example Construction

[0033] The preparation method of the organic electroluminescence device 100 of an embodiment, it comprises the following steps:

[0034] 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 .

[0035] 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.

[0036] 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 .

[0037] The hole injection la...

Embodiment 1

[0051] The structure prepared in this example is ITO / WO 3 / NPB / Alq 3 / Bphen / LiF / TAZ:MoO 3 / Ta 2 o 5 The organic electroluminescent device of / Ag / ZnS / , in this embodiment and the following embodiments, " / " indicates a layer, and ":" indicates doping.

[0052] 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 Carry out suitable treatment: oxygen plasma treatment, treatment time is 5min, power is 30W; evaporation hole injection layer, material is WO 3 , with a thickness of 35nm; the vapor-deposited hole transport layer, the material is NPB, and the thickness is 40nm; the vapor-deposited light-emitting layer, the material is Alq 3 , thickness is 15nm; Evaporation electron transport layer, material is Bphen, thickness is 250nm; Evaporation electron injection ...

Embodiment 2

[0059] The structure prepared in this example is AZO / MoO 3 / NPB / ADN / TAZ / CsF / OXD-7:WO 3 / Nb 2 o 5 / Al / CdS organic electroluminescent devices.

[0060] First, use detergent, deionized water, and ultrasonication on the AZO glass substrate for 15 minutes to remove organic pollutants on the glass surface; evaporate the hole injection layer: the material is MoO 3 , the thickness is 80nm; evaporation hole transport layer: the material is NPB, the thickness is 60nm; evaporation light-emitting layer: the selected material is ADN, the thickness is 5nm; evaporation electron transport layer, the material is TAZ, the thickness is 75nm; The electron injection layer is plated, the material is CsF, and the thickness is 10nm; the evaporation cathode is evaporated on the surface of the electron injection layer by thermal resistance evaporation to prepare an organic electron transport doped layer, and the material is OXD-7:WO 3 , OXD-7 and WO 3 The mass ratio is 2:1, the thickness is 50nm, ...

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Abstract

An organic light-emitting device comprises an anode, a hole injection layer, a hole transmission layer, a lighting layer, an electronic transmission layer, an electronic injection layer and a cathode stacked in sequence; the cathode layer comprises an organic electronic transmission dope layer, a VB group oxide layer, a metal layer and a metal sulfide layer; the organic electronic transmission dope layer comprises an organic electronic transmission material and a bipolar metal oxide doped in the organic electronic transmission material; the bipolar metal oxide is made of at least one material from a group formed by molybdenum trioxide, tungsten trioxide and vanadium pentoxide; the VB group oxide layer is made of at least one material from a group formed by tantalum pentoxide, niobium pentoxide and vanadium pentoxide; the metal layer material is selected from at least one from a group formed by silver, aluminum, platinum and gold; the metal sulfide layer material is selected from at least one from a group formed by zinc sulfide, cadmium sulfide, magnesium sulfide and copper sulfide; the organic light-emitting device is high in lighting efficiency; the invention also provides an organic light-emitting device making method.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/56H01L51/54
CPCH10K85/60H10K50/165H10K50/82H10K2102/00H10K2102/302H10K71/00
Inventor 周明杰黄辉张娟娟王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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