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Organic electroluminescence device and manufacturing method for organic electroluminescence device

An electroluminescent device and luminescent technology, applied in the direction of organic light-emitting devices, organic light-emitting device structures, electric solid-state devices, etc., can solve the problems of poor refractive index, low light-emitting performance, total reflection loss, etc., and achieve stable luminous color, The effect of lowering the potential barrier and reducing the decay speed

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 oxide layer 201, a luminescent material layer 202 and an iron salt layer 203. The metal oxide layer 201 is prepared on the surface of the glass substrate 10 by thermal resistance evaporation, and the HOMO of the material of the metal oxide layer 201 is The energy level is -5.2eV~-6.0eV, and the luminescent material layer is prepared by thermal resistance evaporation on the surface of the metal oxide layer 201, and the material of the luminescent material layer 202 is 4-(dinitrile methyl)-2 -Butyl-6-(1,1,7,7-tetramethyljulodine-9-vinyl)-4H-pyran (DCJTB), 9,10-di-β-naphthylene anthracene ( AD...

Embodiment 1

[0058] The structure prepared in this example is glass substrate / MoO 3 / Alq 3 / FeCl 3 / ITO / MoO 3 / NPB / Alq 3 / TAZ / CsF / Au organic electroluminescent device, in this embodiment and the following embodiments, " / " indicates a layer, and ":" indicates doping.

[0059] 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 oxide layer, a luminescent material layer and an iron salt layer. The metal oxide layer is prepared by thermal resistance evaporation on the surface of the glass substrate. The material is MoO 3 , the thickness is 12nm, and the light-emitting layer is prepared by thermal resistance evaporation on the surface of the metal oxide layer, and the material is Alq 3 , the thickness is 70nm, and the iron salt layer is prepared by thermal resistance evaporation on the surface of the light-em...

Embodiment 2

[0066] The structure prepared in this example is a glass substrate / WO 3 / DCJTB / FeBr 3 / IZO / WO 3 / TCTA / ADN / CsN 3 / Al organic electroluminescent devices.

[0067] 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 consists of a metal oxide layer, a luminescent material layer and an iron salt layer. Composition, the metal oxide layer is prepared by thermal resistance evaporation on the surface of the glass substrate, and the material is WO 3 , with a thickness of 10nm. The light-emitting layer was prepared by thermal resistance evaporation on the surface of the metal oxide layer. The material was DCJTB, and the thickness was 80nm. The iron salt layer was prepared by thermal resistance evaporation on the surface of the light-emitting layer. The material was FeBr 3 , with a thickness of 50nm. Then IZO is prepared on th...

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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 oxide layer, a light-emitting material layer and an iron salt layer; the HOMO energy level of the material of the metal oxide layer is between -5.2 eV and -6.0 eV; the material of the light-emitting layer is selected from one and more of 4-(dicyanomethyl)-2-butyl-6-(1,1,7,7-tetramethyljulolidine-9-ethenyl)-4H-pyran, 9,10-di-beta-naphthyl anthracene, 4,4'-di(9-ethyl-3-vinylcarbazole)-1-1'-biphenyl and 8-hydroxyquinoline aluminum; the material of the iron salt layer is selected from one and more of iron chloride, iron bromide and iron sulfide. 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 electroluminescent 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 rest...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/52H01L51/54H01L51/56
CPCH10K85/00H10K30/865H10K50/11H10K2101/40H10K50/00H10K50/854H10K2102/302H10K71/00
Inventor 周明杰黄辉张振华王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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