Organic electroluminescence device and preparation method thereof

An electroluminescent device and electroluminescent technology, which are applied in the fields of electro-solid devices, semiconductor/solid-state device manufacturing, electrical components, etc., can solve the problems of refractive index difference, total reflection loss, low light output performance, etc. The effect of enhancing the scattering of light and increasing the transmission rate

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

[0038] The manufacturing method of the organic electroluminescent device 100 of an embodiment includes the following steps:

[0039] In step S110, the scattering layer 20 is prepared by electron beam evaporation on the surface of the glass substrate 10.

[0040] The scattering layer 20 is formed on one side surface of the glass substrate 10. The scattering layer 20 is composed of a ternary doped layer 201 and a hole transport material doped layer 202. The ternary doped layer 201 is prepared on the surface of the glass substrate 10 by electron beam evaporation. The ternary doped layer 201 includes Luminescent material, organic silicon small molecule material and copper compound material, the luminescent material is selected from 4-(dinitrile methyl)-2-butyl-6-(1,1,7,7-tetramethylgyura Methidine-9-vinyl)-4H-pyran (DCJTB), 9,10-di-β-naphthyleneanthracene (ADN), 4,4'-bis(9-ethyl-3-carbazole vinyl) Base) -1,1'-biphenyl (BCzVBi) and 8-hydroxyquinoline aluminum (Alq 3 ), the energy gap ...

Embodiment 1

[0061] The structure prepared in this embodiment is a glass substrate / Alq 3 :UGH2:CuI / TAPC:MgF 2 / ITO / MoO 3 / NPB / Alq 3 / TAZ / CsF / Ag organic electroluminescence device. In this embodiment and the following embodiments, " / " means layer, and ":" means doping.

[0062] The glass substrate is N-LASF44. After the glass substrate is rinsed with distilled water and ethanol, it is soaked in isopropanol overnight. A scattering layer is prepared on a glass substrate. The scattering layer is composed of a ternary doped layer and a hole transport material doped layer. The ternary doped layer is prepared by electron beam evaporation on the surface of the glass substrate. The material is Alq 3 :UGH2:CuI, Alq 3 The mass ratio of UGH2 to CuI is 10:3:1 and the thickness is 400nm. The cesium salt material doped layer is prepared by thermal resistance evaporation on the ternary doped surface, the material is TAPC:MgF 2 , TAPC and MgF 2 The mass ratio is 9:1 and the thickness is 160nm. Then, ITO is pre...

Embodiment 2

[0070] The preparation structure of this embodiment is a glass substrate / ADN: UGH1: Cu 2 O / TCTA:MgO / IZO / V 2 O 5 / TAPC / DCJTB / TAZ / Cs 2 CO 3 / Al organic electroluminescent device.

[0071] The glass substrate is N-LAF36. After the glass substrate is rinsed with distilled water and ethanol, it is soaked in isopropanol for one night to prepare a scattering layer on the glass substrate. The scattering layer is doped with a ternary doped layer and hole transport material Layer composition, using electron beam evaporation to prepare ternary doping on the surface of the glass substrate, the material is ADN:UGH1:Cu 2 O, AND, UGH1 and Cu 2 The mass ratio of O is 4:1:1 and the thickness is 600nm. The cesium salt material doped layer is prepared by thermal resistance evaporation on the ternary doped surface. The material is TCTA:MgO, and the mass ratio of TCTA to MgO is 7:1 , The thickness is 100nm. Then IZO is prepared on the scattering layer, the thickness is 80nm, and it is prepared by mag...

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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 ternary doped layer and a hole transfer material doped layer; the ternary doped layer comprises a light emitting material, an organic silicon micromolecule material and a copper compound material; the energy gap of the organic silicon micromolecule material is minus 3.5-minus 5.5eV; the copper compound material is selected from at least one of copper iodide, cuprous oxide, copper phthalocyanine and copper oxide; the hole transfer material doped layer comprises a hole transfer material and a magnesium compound material doped in the hole transfer material; the magnesium compound material is selected from at least one of magnesium fluoride, magnesium oxide, magnesium chloride and magnesium sulfide. 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 light-emitting principle of organic electroluminescent devices is based on the fact that electrons are injected from the cathode to the lowest unoccupied molecular orbital (LUMO) of organic matter under the action of an external electric field, and holes are injected from the anode to the highest occupied orbital (HOMO) of organic matter. Electrons and holes meet and recombine in the light-emitting layer to form excitons. The excitons migrate under the action of an electric field, transfer energy to the luminescent material, and excite the electrons to transition from the ground state to the excited state. The excited state energy is deactivated by radiation to produce photons , Release light energy. [0003] In traditional light-emitting devices, only about 18% of the light inside the device can be emitted to the outside, while ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/54H01L51/56
CPCH10K50/854H10K71/00
Inventor 周明杰黄辉陈吉星王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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