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Organic electroluminescent device and preparation method thereof

An electroluminescence device and a luminescence technology, applied in the direction of electric solid-state devices, semiconductor/solid-state device manufacturing, electrical components, etc., can solve the problem of 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 wa...

Embodiment 1

[0058] The structure prepared in this example is glass / ITO / CaCO 3 :NPB / LiF: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; prepare a scattering layer on the surface of the anode, the scattering layer includes a carbonate doped layer and a lithium compound doped layer, first prepare the carbonate doped layer, Materials including CaCO 3 and NPB, CaCO 3 and NPB 3 The mass ratio is 0.1:1, prepared by electron beam, the thickness is 45nm, and then the lithium compound doped layer is prepared, the material includes LiF and Zn, and the electron beam evaporation is used, the thickness is 10nm, and the mass ratio of Zn to LiF is 0.02: 1; The hole injection layer is prepared by evaporation, and the material is WO 3 , the t...

Embodiment 2

[0064] The structure prepared in this example is glass substrate / IZO / MgCO 3 :TCTA / Li 2 CO 3 :Zn / V 2 o 5 / TAPC / DCJTB / TPBi / CsN 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 a scattering layer is prepared, consisting of a carbonate doped layer and a lithium compound doped layer. Prepare the carbonate doped layer first, the material includes MgCO 3 and TCTA, MgCO 3 The mass ratio to TCTA is 0.05:1, prepared by electron beam, and the thickness is 60nm. Then prepare the lithium compound doped layer, the material includes Li 2 CO 3 And Zn, Zn and Li 2 CO 3 The mass ratio is 0.05:1, prepared by electron beam, and the thickness is 5nm. Evaporated hole injection layer: the material is V 2 o 5 , with a t...

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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 carbonate doped layer formed on the surface of the anode and a lithium compound doped layer formed on the surface of the carbonate doped layer; the material of the carbonate doped layer includes carbonate and hole transport material doped in the carbonate, and the mass ratio of the carbonate and the hole transport material is 0.05:1 to 0.2:1; and the material of the lithium compound doped layer includes lithium compounds and zinc doped in the lithium compounds, and the mass ratio of the lithium compounds and the zinc is 1:0.01 to 1:0.05. 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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IPC IPC(8): H01L51/52H01L51/54H01L51/56
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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