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Organic electroluminescence device and preparation method thereof

An electroluminescent device and luminescent technology, which is applied in the direction of electric solid-state devices, semiconductor/solid-state device manufacturing, electrical components, etc., can solve the problems of total reflection loss, low light extraction performance, poor refractive index, etc., and achieve the reduction of attenuation speed, Improve luminous efficiency and stabilize luminous color

Inactive Publication Date: 2015-05-27
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • 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

[0037] The preparation method of the organic electroluminescence device 100 of an embodiment, it comprises the following steps:

[0038] Step S110 , preparing the scattering layer 20 on the surface of the glass substrate 10 by electron beam evaporation.

[0039] The scattering layer 20 is formed on one side surface of the glass substrate 10 . The scattering layer 20 is composed of a calcium compound material doped layer 201 and a binary doped layer 202. The calcium compound material doped layer 201 is prepared on the bottom surface of the glass substrate 10 by electron beam evaporation. The calcium compound material The doping layer 201 includes a calcium compound material and a luminescent material doped in the calcium compound material, and the luminescent material is selected from 4-(dinitrilemethyl)-2-butyl-6-(1,1 ,7,7-Tetramethyljulodine-9-vinyl)-4H-pyran, 9,10-di-β-naphthylene anthracene, 4,4'-bis(9-ethyl-3 At least one of -carbazole vinyl)-1,1'-biphenyl and 8-hydroxyq...

Embodiment 1

[0059] The structure prepared in this example is glass substrate / CaO:Alq 3 / UGH2:CuO / 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.

[0060] 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 calcium compound material doped layer and a binary doped layer. The calcium compound material doped layer is prepared on the surface of the glass substrate by electron beam evaporation, and the material is CaO:Alq 3 , CaO and Alq 3 The mass ratio is 4.5:1, the thickness is 50nm, and the energy density of electron beam evaporation is 30W / cm 2 , on the surface of the calcium compound material doped layer, electron beam evaporation is used to prepare a binary doped layer, the material is UG...

Embodiment 2

[0067] The structure prepared in this example is a glass substrate / CaCl 2 :ADN / UGH1:CuI / IZO / MoO 3 / NPB / ADN / Bphen / Cs 2 CO 3 / Au organic electroluminescent devices.

[0068] 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 made of calcium compound material doping layer and binary doping layer composition, the calcium compound material doped layer is prepared on the surface of the glass substrate by electron beam evaporation, and the material is CaCl 2 :ADN, CaCl 2 The mass ratio to ADN is 8:1, the thickness is 40nm, and the energy density of electron beam evaporation is 30W / cm 2 , on the surface of the compound material doped layer of calcium, the binary doped layer is prepared by electron beam evaporation, the material is UGH1:CuI, the mass ratio of UGH1 and CuI is 4:0.1, the thickness is 10nm, and the energy ...

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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 calcium compound material doped layer and a binary doped layer; the calcium compound material doped layer comprises a calcium compound material and a light emitting material doped in the calcium compound material; the calcium compound material is selected from at least one of calcium oxide, calcium chloride, calcium carbonate and calcium fluoride; the binary doped layer comprises an organic silicon micromolecule material and a copper compound material doped in the organic silicon micromolecule material. 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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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/54H01L51/56
Inventor 周明杰黄辉陈吉星王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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