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Organic electroluminescence device and preparation method thereof

An electroluminescent device and luminescent technology, which is applied in the fields of electric solid-state devices, semiconductor/solid-state device manufacturing, electrical components, etc., can solve the problems of poor refractive index, loss of total reflection, low light extraction 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 ternary doped layer 201 and an iron salt doped layer 202. The ternary doped layer 201 is prepared on the surface of the glass substrate 10 by electron beam evaporation, and the ternary doped layer 201 includes titanium dioxide ( TiO 2 ), a compound material of magnesium and a luminescent material, the compound material of magnesium is selected from magnesium fluoride (MgF 2 ), magnesium oxide (MgO) and magnesium sulfide (MgS), and the luminescent material is selected from 4-(dinitrile methyl)-2-butyl-6-(1,1,7,7-tetra Methyljuronesidine-9-vinyl)-4H-pyran (DCJTB), 9,10-di-β-naphthylene anthracene ...

Embodiment 1

[0061] The structure prepared in this example is glass substrate / TiO 2 :MgS:Alq 3 / FeCl 3 :UGH1 / 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.

[0062] The glass substrate is N-LASF44. After rinsing the glass substrate with distilled water and ethanol, soak it in isopropanol for one night. The scattering layer is prepared on the glass substrate. The scattering layer is composed of a ternary doped layer and an iron salt doped layer. The ternary doped layer is prepared by electron beam evaporation on the surface of the glass substrate. The material is TiO 2 :MgS:Alq 3 ,TiO 2 , MgS and Alq 3 The mass ratio of the titanium dioxide is 0.2:5:1, the particle size of titanium dioxide is 50nm, and the thickness is 110nm. The iron salt doped layer is prepared by thermal resistance evaporation on the surface of the ternary doped layer, and the material is FeCl 3...

Embodiment 2

[0070] The structure prepared in this example is glass substrate / TiO 2 :MgF 2 :DCJTB / FeBr 3 :UGH2 / IZO / MoO 3 / TAPC / ADN / Bphen / Cs 2 CO 3 / Al organic electroluminescent devices.

[0071] 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 a ternary doped layer and an iron salt doped layer. , on the surface of the glass substrate, the ternary doped layer was prepared by electron beam evaporation, and the material was TiO 2 :MgF 2 : DCJTB, TiO 2 , MgF 2 The mass ratio to DCJTB is 0.1:3:1, the particle size of titanium dioxide is 20nm, and the thickness is 300nm. The iron salt doped layer is prepared by thermal resistance evaporation on the surface of the ternary doped layer, and the material is FeBr 3 : UGH2, FeBr 3 The mass ratio to UGH2 is 2:0.1, and the thickness is 30nm. Then IZO is prepared on t...

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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 consists of a ternary doped layer and a ferric salt doped layer; the ternary doped layer comprises titanium dioxide, a magnesium compound material and a light emitting material; the magnesium compound material is selected from at least one of magnesium fluoride, magnesium oxide and magnesium sulfide; the ferric salt doped layer comprises a ferric salt material and an organic silicon micromolecule material doped in the ferric salt material; the ferric salt material is selected from at least one of ferric chloride, ferric bromide and ferric sulfide; the energy gap of the organic silicon micromolecule material is minus 3.5-minus 5.5eV. The organic electroluminescence device disclosed by the invention is relatively high in light emission efficiency. The invention further provides a preparation method of the organic electroluminescence device.

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): H01L51/50H01L51/52H01L51/54H01L51/56
CPCH10K50/00H10K50/854H10K71/00
Inventor 周明杰黄辉张振华王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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