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Organic electroluminescent device and preparation method thereof

An electroluminescent device, organic technology, applied in the direction of electric solid device, semiconductor/solid state device manufacturing, electrical components, etc., to achieve the effect of small dispersion, reduced preparation process and cost, and increased proportion of forward light output

Inactive Publication Date: 2019-02-22
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to achieve a balanced improvement in terms of process complexity, device integration, and optocoupler output efficiency of the optical coupling structure in view of the above-mentioned deficiencies in the prior art

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

[0042] A method for preparing an organic electroluminescent device, comprising the following steps:

[0043] S1. On the surface of the roller or the flat plate, the female mold structure is processed by cutting tool engraving or laser ablation;

[0044] S2, using the roller or flat plate processed in step S1 to press out the Fresnel lens structure teeth on the base;

[0045] S3, post-processing and shaping the Fresnel lens substrate prepared in step S2;

[0046] S4, using ethanol, acetone ultrasonic and deionized water ultrasonic methods to clean the substrate, and dry after cleaning;

[0047] S5. There is no Fresnel lens structure layer on the substrate, and a transparent conductive film is prepared as a transparent anode, and the square resistance of the transparent anode is 5 to 30 ohms per square;

[0048] S6. Transfer the substrate prepared in step S5 into the vacuum chamber, control the rate of 1-10nm / s, and sequentially prepare organic functional layers by vacuum ther...

Embodiment

[0052] A green organic electroluminescent device, using a knife to carve a Fresnel lens negative mold on the surface of a glass plate, and preparing a Fresnel lens with a focal length of 16 mm and a groove pitch of 0.1 mm on a PET substrate by hot pressing . Indium tin oxide transparent conductive film was prepared on PET substrate by electron beam evaporation method.

[0053] Prepare organic functional layers sequentially by vacuum thermal evaporation method: 40nm thick 4,4′,4′-Tris[2-naphthyl (phenyl)amino]triphenylamine is the hole injection layer, 20nm thick N,N' -Diphenyl-N,N'-bis(2-naphthyl)-1,1'-biphenyl-4,4'-diamine as hole transport layer, 20 nm thick 8-hydroxyquinoline aluminum doped 10-(2-Benzothiazolyl)-2-,3,6-,7-tetrahydro-1,7-,7-tetramethyl-1H,5H,11H-(1)benzopyranpyran (6,7-8-I, J) Quinolinazine-11-1 was used as the light-emitting layer (the doping volume ratio was 1:0.03), and 40nm-thick 8-hydroxyquinoline aluminum was used as the electron-transporting layer. ...

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Abstract

The invention discloses an organic electroluminescent device and a preparation method thereof. The organic electroluminescent device comprises an OLED device, a substrate and a Fresnel lens. A transparent conductive electrode is arranged on the substrate; the OLED device is arranged on one side of the substrate; and the Fresnel lens is disposed on the other side of the substrate. The optical coupling structure of the invention contributes to output the optical coupling generated by the OLED device to the outside of the device and has a focusing effect. The organic electroluminescent device canbe widely applied to the illumination field of the organic electroluminescent device. The optical coupling structure can improve the optical coupling output of the device so as to increase the external quantum efficiency of the device, contribute to an increase in the utilization rate of photons and to energy saving. Further, since the structure does not change the proportion of light in each wavelength band, the color of the light is not changed.

Description

technical field [0001] The invention belongs to the technical field of organic electroluminescent devices, and in particular relates to a structure of an organic electroluminescent device and a preparation method thereof. Background technique [0002] Organic electroluminescent devices have great application prospects in the fields of lighting and display due to their advantages such as surface emission, high color rendering index, full-spectrum emission, and easy flexibility. The low optical coupling output efficiency of organic electroluminescent devices is the bottleneck problem that limits the performance improvement of devices. Refractive index mismatch is the main reason that limits the light outcoupling efficiency of organic electroluminescent devices. Taking organic electroluminescent devices based on ITO glass as an example, the refractive index of organic thin films and ITO conductive films is usually higher, about 1.7, the refractive index of glass is about 1.5, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52H01L51/00H01L51/56H10K99/00
CPCH10K77/10H10K50/81H10K50/858H10K71/00Y02E10/549Y02P70/50
Inventor 吴朝新焦博彭尧侯洵
Owner XI AN JIAOTONG UNIV
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