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Preparation method of electronic device and display device

A technology for electronic devices and display devices, which is applied in the fields of electric solid-state devices, semiconductor/solid-state device manufacturing, electrical components, etc., and can solve the problems of uneven heating and large energy consumption.

Pending Publication Date: 2021-05-14
GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, high temperature annealing will inevitably lead to uneven heating of each layer and large energy consumption

Method used

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  • Preparation method of electronic device and display device
  • Preparation method of electronic device and display device

Examples

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preparation example Construction

[0027] The preparation method of the electronic device that the present invention proposes, comprises the following steps:

[0028] S10, dispersing nano-zinc oxide into a solvent (for example, ethanol) to form a dispersion liquid, and coating the dispersion liquid to form a thin film;

[0029] In this step, the concentration of nano zinc oxide in the dispersion liquid is 20-40 mg / L. Under the above concentration, the nano zinc oxide can be uniformly dispersed on the substrate to form a uniform and stable electron injection layer. The solvent can be ethanol, which can make the zinc oxide disperse evenly, which is beneficial to the subsequent uniform film formation.

[0030] S20, performing light treatment on the thin film to obtain an electron injection layer.

[0031] Preferably, in this step, the light treatment is treatment with ultraviolet light. The wavelength of ultraviolet rays is between 10 and 400nm, and the energy is high, which makes the film harden and dry quickl...

Embodiment 1

[0046] Disperse nano-zinc oxide in ethanol to form a dispersion with a concentration of 20mg / mL, spin-coat the dispersion on a glass sheet at a speed of 3000rmp to prepare a zinc oxide film, and then irradiate the zinc oxide film with ultraviolet rays for 2min to obtain an electron injection layer. Among them, the ultraviolet intensity of the ultraviolet lamp is 15MW / cm 2 , the wavelength is 185nm.

Embodiment 2

[0048] Disperse nano-zinc oxide in ethanol to form a dispersion with a concentration of 20mg / mL, spin-coat the dispersion on a glass sheet at a speed of 3000rmp to prepare a zinc oxide film, and then irradiate the zinc oxide film with ultraviolet rays for 2min to obtain an electron injection layer. Among them, the ultraviolet intensity of the ultraviolet lamp is 15MW / cm 2 , the wavelength is 254nm.

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Abstract

The invention discloses a preparation method of an electronic device and a display device, and relates to the technical field of electronic devices, the electronic device comprises an electron injection layer, the preparation method of the electron injection layer comprises the following steps: S10, dispersing nano-zinc oxide into a solvent to form a dispersion liquid, and coating the dispersion liquid to form a thin film; and S20, carrying out light treatment on the thin film to obtain an electron injection layer. The electron injection layer prepared by the preparation method of the electronic device provided by the invention does not need to be subjected to annealing treatment, so that uneven heating of each layer is avoided, and energy is saved.

Description

technical field [0001] The invention relates to the technical field of electronic devices, in particular to a method for preparing an electronic device and a display device. Background technique [0002] Zinc oxide (ZnO) is often used as an electronic transport material for various electronic devices due to its large band gap (3.7eV), weak absorption of visible light (transmittance over 98%), and high binding energy. By doping Mg and other elements to adjust the forbidden band width, change the electron transport barrier, reduce defects, promote the transport balance of electrons and holes, and improve device performance. [0003] In the specific preparation of electronic devices, taking organic light emitting diodes as an example, when preparing an inverted organic light emitting diode by spin coating, zinc oxide is used as the electron injection layer. If the emissive layer (EML) solution is directly spin-coated on it, zinc oxide will Quenching the excitons of the organic...

Claims

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Application Information

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IPC IPC(8): H01L51/56H01L51/50
CPCH10K71/12H10K71/15H10K50/115H10K50/171Y02E10/549
Inventor 郭世赣
Owner GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
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