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Organic electroluminescence device and preparation method thereof

An electroluminescence device and luminescence 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 poor refractive index, loss of total reflection, low light extraction performance, etc., to improve luminous efficiency, Long life and low barrier effect

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

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preparation example Construction

[0035] The preparation method of the organic electroluminescence device 100 of an embodiment, it comprises the following steps:

[0036] Step S110 , preparing the scattering layer 20 on the surface of the glass substrate 10 by electron beam evaporation.

[0037] The scattering layer 20 is formed on one side surface of the glass substrate 10 . The scattering layer 20 includes a luminescent material, a compound material of copper and a compound material of rhenium, and the scattering layer 20 is prepared by electron beam evaporation on the surface of the glass substrate 10, and the material of the luminescent material is selected from 4-(dinitrile methyl) -2-Butyl-6-(1,1,7,7-tetramethyljulonedine-9-vinyl)-4H-pyran (DCJTB), 9,10-di-β-naphthylene Anthracene (ADN), 4,4'-bis(9-ethyl-3-carbazolevinyl)-1,1'-biphenyl (BCzVBi) and 8-hydroxyquinoline aluminum (Alq 3 ), the copper compound material is selected from cuprous iodide (CuI), cuprous oxide (Cu 2 O), at least one of copper ph...

Embodiment 1

[0056] The structure prepared in this example is glass substrate / Alq 3 :Cu 2 O:Re 2 o 7 / 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.

[0057] 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 luminescent material of the scattering layer, the compound material of copper and the compound material of rhenium, and prepare the scattering layer on the surface of the glass substrate by electron beam evaporation, and the material is Alq 3 :Cu 2 O::Re 2 o 7 , Alq 3 , Cu 2 O and Re 2 o 7 The mass ratio is 10:2.2:1, and the thickness is 400nm. Then ITO is prepared on the scattering layer with a thickness of 100nm, which is prepared by magnetron sputtering; the hole injection layer is prepared by evaporation: th...

Embodiment 2

[0064] The structure prepared in this example is glass substrate / DCJTB:CuI:ReO 2 / IZO / MoO 3 / TAPC / ADN / Bphen / Cs 2 CO 3 / Au organic electroluminescent devices.

[0065] 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 prepared by electron beam evaporation on the surface of the substrate, and the material is DCJTB:CuI:ReO 2 , DCJTB, CuI and ReO 2 The mass ratio is 8:2:1, and the thickness is 500nm. Then IZO is prepared on the scattering layer with a thickness of 80nm, which is prepared by magnetron sputtering; the hole injection layer is evaporated, and the material is MoO 3 , with a thickness of 40nm; evaporated hole transport layer: the material is TAPC, with a thickness of 45nm; evaporated luminescent layer: the selected material is ADN, with a thickness of 8nm; evaporated electron transport layer, the mater...

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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 light emitting material, a copper compound material and a rhenium compound material; the material of the light emitting material is selected from at least one of 4-(dinitrile methyl)-2-butyl-6-(1,1,7,7-tetramethyljulolidine-9-vinyl)-4H-pyran, 9,10-di-beta-naphthylene anthracene, 4,4'-di(9-ethyl-3-carbazole vinyl)-1,1'-biphenyl and 8-hydroxyquinoline aluminum; the copper compound material is selected from at least one of copper iodide, cuprous oxide, copper phthalocyanine and copper oxide; the rhenium compound material is selected from at least one of rhenium heptoxide, rhenium oxide, rhenium trioxide and rhenium chloride. The organic electroluminescence device disclosed by the invention is relatively high in light emission efficiency.

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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