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Organic electroluminescent device and preparation method thereof

An electroluminescent device and electroluminescent technology, which can be applied in the fields of electro-solid devices, semiconductor/solid-state device manufacturing, electrical components, etc., and can solve problems such as low light-emitting performance

Inactive Publication Date: 2015-03-18
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

Traditional organic electroluminescent devices have low light extraction performance

Method used

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  • Organic electroluminescent device and preparation method thereof
  • Organic electroluminescent device and preparation method thereof
  • Organic electroluminescent device and preparation method thereof

Examples

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preparation example Construction

[0036] Please also see figure 2 , the preparation method of the organic electroluminescent device 100 of an embodiment, it comprises the following steps:

[0037] Step S110 , anode 20 on the surface of glass substrate 10 .

[0038] The glass substrate 10 is glass with a refractive index of 1.8-2.2, and the transmittance at 400 nm is higher than 90%. The glass substrate 10 is preferably glass with a grade of N-LAF36, N-LASF31A, N-LASF41A or N-LASF44.

[0039] The anode 20 is formed on one side surface of the glass substrate 10 . The material of the anode 20 is indium tin oxide (ITO), aluminum zinc oxide (AZO) or indium zinc oxide (IZO), preferably ITO. The thickness of the anode 20 is 80nm-300nm, preferably 120nm. The anode 20 is prepared by magnetron sputtering. The acceleration voltage of magnetron sputtering is 300-800V, the magnetic field is 50-200G, and the power density is 1-40W / cm 2 .

[0040] In this embodiment, the glass substrate 10 is rinsed with distilled wate...

Embodiment 1

[0058] The structure prepared in this example is glass / ITO / CsN 3 :MgCO 3 / TiO 2 :Zn / WO 3 / NPB / BCzVBi / TAZ / CsF / Ag organic electroluminescence device.

[0059] The glass substrate is N-LASF44. After rinsing the glass substrate with distilled water and ethanol, soak it in isopropanol for one night. Magnetron sputtering anode on the glass substrate, the material is ITO, the thickness is 120nm; the scattering layer is prepared on the surface of the anode, the scattering layer includes a cesium salt doped layer and a titanium dioxide doped layer, and the cesium salt doped layer is prepared first, and the material includes CsN 3 and MgCO 3 , CsN 3 and MgCO 3 The mass ratio is 6:1, prepared by electron beam, the thickness is 45nm, and then prepared titanium dioxide doped layer, the material includes titanium dioxide and zinc, using electron beam evaporation, the thickness is 80nm, TiO 2 Particle size is 50nm, TiO 2 The mass ratio to Zn is 40:1; the hole injection layer is prepa...

Embodiment 2

[0064] The structure prepared in this example is glass substrate / IZO / Cs 2 CO 3 :CaCO 3 / TiO 2 :Zn / V 2 o 5 / TAPC / DCJTB / TPBi / Cs 2 CO 3 / Pt organic electroluminescent devices.

[0065] The high refractive index glass is N-LAF36. After the glass is rinsed with distilled water and ethanol, soak it in isopropanol for one night. An anode film was prepared on a high refractive index glass substrate, the material was IZO, and the thickness was 80nm. Then the scattering layer is prepared, which is composed of a cesium salt doped layer and a titanium dioxide layer. The cesium salt doped layer is prepared first, and the material includes Cs 2 CO 3 and CaCO 3 , Cs 2 CO 3 and CaCO 3 The doping mass ratio is 4:1, prepared by electron beam, with a thickness of 30nm, and then a titanium dioxide layer is prepared, and the material includes TiO 2 And Zn, TiO 2 The mass ratio to Zn is 50:1, using electron beam evaporation, the thickness is 100nm, TiO 2 The particle size is 20nm. Ev...

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Abstract

An organic electroluminescent device includes a glass substrate, an anode, a scattering layer, a hole injection layer, a hole transport layer, a luminous layer, an electron transport layer, an electron injection layer and a cathode which are stacked in sequence. The scattering layer includes a cesium salt doped layer formed on the surface of the anode and a titanium dioxide doped layer formed on the surface of the cesium salt doped layer; the material of the cesium salt doped layer includes cesium salt and carbonate doped in cesium salt, and the mass ratio of cesium salt and carbonate is 4:1 to 8:1; and the material of the titanium dioxide doped layer includes titanium dioxide and zinc doped in titanium dioxide, and the mass ratio of titanium dioxide and zinc is 50:1 to 20:1. The light extraction efficiency of the abovementioned organic electroluminescent device is relatively high. The invention also provides a preparation method of the organic electroluminescent 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. Traditional organic electroluminescent devices have low light extraction performance. Contents of the invention [0003] Based on this,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/54H01L51/56
CPCH10K71/164H10K50/854
Inventor 周明杰黄辉钟铁涛王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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