Organic electroluminescence device and manufacturing method for organic electroluminescence device

An electroluminescent device and 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., and achieve long life and attenuation. The effect of reducing the speed and increasing the transfer rate

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 manufacturing method for organic electroluminescence device
  • Organic electroluminescence device and manufacturing method for organic electroluminescence device
  • Organic electroluminescence device and manufacturing method for organic electroluminescence device

Examples

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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 metal material layer 201 and a ternary doped layer 202. The metal material layer 201 is prepared on the surface of the glass substrate 10 by thermal resistance evaporation, and the work function of the metal material is -4.0eV~-5.5eV. A ternary doped layer 202 is prepared on the surface of the metal material layer 201 by thermal resistance evaporation, and the ternary doped layer 202 includes a lithium salt material, a luminescent material and a hole guest material, and the luminescent material is selected from 4- (Dinitrile methyl)-2-butyl-6-(1,1,7,7-tetramethyljulonesidine-9-vinyl)-4H-pyran (DCJ...

Embodiment 1

[0059] The structure prepared in this example is glass substrate / Ag / Li 2 O:Alq 3 :F4-TCNQ / 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. Prepare the scattering layer on the glass substrate. The scattering layer is composed of a metal material layer and a ternary doped layer. The metal material layer is prepared by thermal resistance evaporation on the surface of the glass substrate. The material is Ag and the thickness is 30nm. The ternary doped layer was prepared by thermal resistance evaporation, and the material was Li 2 O:Alq 3 :F4-TCNQ,Li 2 O, Alq 3 The mass ratio to F4-TCNQ is 6:5:0.1, and the thickness is 100nm. Then ITO is prepared on the scattering layer with a thickness of 100nm, which is prepare...

Embodiment 2

[0067] The structure prepared in this example is glass substrate / Al / LiF:DCJTB:1T-NATA / AZO / V 2 o 5 / TAPC / ADN / Bphen / CsN 3 / Al 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 composed of a metal material layer and a ternary doped layer. The metal material layer is prepared by thermal resistance evaporation on the surface of the glass substrate, the material is Al, and the thickness is 20nm, and the ternary doped layer is prepared by thermal resistance evaporation on the surface of the metal material layer, and the material is LiF:DCJTB:1T-NATA, LiF: DCJTB: 1T-NATA. The mass ratio is 3:2:0.1, and the thickness is 200nm. Then AZO is prepared on the scattering layer with a thickness of 80nm, which is prepared by magnetron sputtering; the hole injection layer is evaporate...

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Abstract

The invention discloses an organic electroluminescence device. The organic electroluminescence device comprises a glass substrate, a scattering layer, a positive pole, a hole-injection layer, a hole-transmission layer, a light-emitting layer, an electronic transmission layer, an electronic injection layer and a negative pole which are sequentially overlapped, wherein the scattering layer comprises a metal material layer and a three-element doped layer; the work function of the metal material is between -4.0eV and -5.5eV; the three-element doped layer comprises a lithium salt material, a light-emitting material and a hole object material; the lithium salt material is selected from one and more of lithium oxide, lithium fluoride, lithium chloride and lithium bromide; the hole object material is selected from one and more of 2,3,5,6-tetrafluoro-7,7,8,8-tetracyano-quinodimethane, 4,4,4-tri(naphthyl-1-phenyl-amino) triphenylamine and dinaphthyl-N,N'-diphenyl-4,4'-benzidine. The organic electroluminescence device is relatively high in light-emitting efficiency. The invention also provides a manufacturing method for 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): H01L51/52H01L51/54H01L51/56
Inventor 周明杰黄辉张振华王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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