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Organic electroluminescence device and preparation method thereof

An electroluminescent device, electroluminescent technology, applied in the direction of electric solid device, semiconductor/solid state device manufacturing, electrical components, etc., can solve the problems of refractive index difference, total reflection loss, low light output performance, etc.

Inactive Publication Date: 2015-05-27
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In traditional light-emitting devices, only about 18% of the light inside the device can be emitted to the outside, while the rest will be consumed outside the device in other forms, and there is a difference in refractive index between the interfaces (such as between glass and ITO). The difference between the refractive index, the refractive index of glass is 1.5, ITO is 1.8, the light from ITO reaches the glass, and total reflection will occur), which causes the loss of total reflection, resulting in lower overall light extraction performance

Method used

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  • Organic electroluminescence device and preparation method thereof
  • Organic electroluminescence device and preparation method thereof
  • Organic electroluminescence device and preparation method thereof

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preparation example Construction

[0038] The preparation method of the organic electroluminescence device 100 of an embodiment, it comprises the following steps:

[0039] Step S110 , preparing the scattering layer 20 on the surface of the glass substrate 10 by electron beam evaporation.

[0040] The scattering layer 20 is formed on one side surface of the glass substrate 10 . The scattering layer 20 is composed of a zinc doped layer 201, a zinc powder layer 202 and an iron salt doped layer 203. The zinc doped layer 201 is prepared on the surface of the glass substrate 10 by electron beam evaporation. The zinc doped layer Layer 201 includes a luminescent material and zinc powder doped in the luminescent material, the luminescent material is selected from the group consisting of 4-(dinitrilemethyl)-2-butyl-6-(1,1,7,7-tetra Methyljuronesidine-9-vinyl)-4H-pyran (DCJTB), 9,10-di-β-naphthylenylene anthracene (ADN), 4,4′-bis(9-ethyl-3 -carbazolevinyl)-1,1′-biphenyl (BCzVBi), 8-hydroxyquinoline aluminum (Alq 3 ), t...

Embodiment 1

[0060] The structure prepared in this example is glass substrate / Alq 3 :Zn / Zn / Alq 3 :FeCl 3 / ITO / MoO 3 / NPB / Alq 3 / TAZ / CsF / Ag organic electroluminescent device, in this embodiment and the following embodiments, " / " indicates a layer, and ":" indicates doping.

[0061] The glass substrate is N-LASF44. After rinsing the glass substrate with distilled water and ethanol, soak it in isopropanol for one night. Prepare the scattering layer on the glass substrate. The scattering layer is composed of zinc doped layer, zinc powder layer and iron salt doped layer. The zinc doped layer is prepared on the surface of the glass substrate by electron beam evaporation, and the material is Alq 3 : Zn, Alq 3 The mass ratio to Zn is 12:1, the thickness is 120nm, and the energy density of electron beam evaporation is 50W / cm 2 , the zinc powder particle size is 25nm, the zinc powder layer is prepared by electron beam evaporation on the surface of the zinc doped layer, the zinc powder particle ...

Embodiment 2

[0069] The structure prepared in this example is glass substrate / DCJTB:Zn / Zn / ADN:FeBr 3 / IZO / MoO 3 / TCTA / ADN / TPBi / CsN 3 / Al organic electroluminescent devices.

[0070] The glass substrate is N-LAF36. After rinsing the glass substrate with distilled water and ethanol, soak it in isopropanol for one night to prepare a scattering layer on the glass substrate. The scattering layer is composed of zinc doped layer, zinc powder layer and iron salt The composition of the doped layer is to prepare the doped layer of zinc by electron beam evaporation on the surface of the glass substrate. The material is DCJTB:Zn, the mass ratio of DCJTB to Zn is 10:1, and the thickness is 150nm. 50W / cm 2 , the zinc powder particle size is 20nm, the zinc powder layer is prepared by electron beam evaporation on the surface of the zinc doped layer, the zinc powder particle size is 40nm, the thickness is 10nm, and the energy density of electron beam evaporation is 30W / cm 2 , on the surface of the zinc...

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Abstract

The invention discloses an organic electroluminescence device which comprises a glass substrate, a scattering layer, an anode, a hole injection layer, a hole transmission layer, a light emitting layer, an electron transfer layer, an electron injection layer and a cathode which are overlapped in sequence, wherein the scattering layer comprises a zinc doped layer, a zinc powder layer and a ferric salt doped layer; the zinc doped layer comprises a light emitting material and zinc powder doped in the light emitting material; the light emitting material is selected from at least one of 4-(dinitrile methyl)-2-butyl-6-(1,1,7,7-tetramethyljulolidine-9-vinyl)-4H-pyran, 9,10-di-beta-naphthylene anthracene, 4,4'-di(9-ethyl-3-carbazole vinyl)-1,1'-biphenyl and 8-hydroxyquinoline aluminum; the ferric salt doped layer comprises a light emitting material and a ferric salt doped in the light emitting material; the light emitting material is described above; the ferric salt is selected from at least one of ferric chloride, ferric bromide and ferric sulfide.

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] In traditional light-emitting devices, only about 18% of the light inside the device can be emitted to the outside, while the res...

Claims

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Application Information

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IPC IPC(8): H01L51/52H01L51/54H01L51/56
Inventor 周明杰黄辉张振华王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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