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Flexible organic light emission diode and preparation method thereof

An electroluminescent device and electroluminescent technology, which are applied in the fields of electric solid state devices, semiconductor/solid state device manufacturing, electrical components, etc., and can solve problems such as cracks in inorganic thin films, peeling off of stainless steel substrates, and damage to light-emitting devices.

Inactive Publication Date: 2015-10-14
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thickness of the traditional inorganic film is more than 5 μm. Because the inorganic film is too thick, when the stainless steel sheet is flexed, the inorganic film will have cracks, which will destroy the integrity of the film, produce pinholes and defects, and occur The phenomenon of detachment from the stainless steel substrate destroys the entire flexible organic electroluminescent device and affects the luminous stability of the flexible organic electroluminescent device

Method used

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  • Flexible organic light emission diode and preparation method thereof
  • Flexible organic light emission diode and preparation method thereof

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preparation example Construction

[0051] Such as figure 2 The preparation method of the above-mentioned flexible organic electroluminescent device shown includes the following steps:

[0052] S10 , providing a cleaned flexible substrate 10 .

[0053] The flexible substrate 10 can be a thin stainless steel sheet with a thickness of 0.05mm-0.2mm and a surface roughness (Ra) of less than 0.6μm.

[0054] Clean the stainless steel sheet for use.

[0055] S20 , preparing a buffer layer 20 on the cleaned flexible substrate 10 obtained in S10 .

[0056] The buffer layer 20 is an organic buffer film and an inorganic buffer film alternately laminated three to five times.

[0057] The material of the organic buffer film is copper phthalocyanine (CuPc), zinc phthalocyanine (ZnPc) or platinum phthalocyanine (PtPc), and the material of the inorganic buffer film is silicon dioxide or aluminum oxide.

[0058] In S20, the vacuum degree is 1×10 -5 ~1×10 -3 Pa.

[0059] The organic buffer film is prepared by thermal resi...

Embodiment 1

[0084] A flexible organic electroluminescent device, including a flexible substrate, a buffer layer, an anode, a hole transport layer, a light emitting layer, an electron transport layer, a cathode and an encapsulation layer stacked in sequence, and the specific structure is expressed as: stainless steel sheet / CuPc / Al 2 o 3 / CuPc / Al 2 o 3 / CuPc / Al 2 o 3 / CuPc / Al 2 o 3 / CuPc / Al 2 o 3 / Ag / NPB / Rubrene / Alq 3 / Al / CuPc / Al 2 o 3 / CuPc / Al 2 o 3 / CuPc / Al 2 o 3 / CuPc / Al 2 o 3 / CuPc / Al 2 o 3 .

[0085] The preparation steps are:

[0086] A stainless steel sheet with a thickness of 0.05mm is provided, cleaned and ready for use.

[0087] In a vacuum of 1×10 -5 In the vacuum coating system of Pa, the CuPc film was prepared by thermal resistance evaporation on the surface of the stainless steel sheet at an evaporation rate of 0.5nm / s, and then Al was prepared on the surface of the CuPc film by electron beam evaporation at an evaporation rate of 0.5nm / s. 2 o 3 film. Re...

Embodiment 2

[0095] A flexible organic electroluminescent device, including a flexible substrate, a buffer layer, an anode, a hole transport layer, a light emitting layer, an electron transport layer, a cathode and an encapsulation layer stacked in sequence, the specific structure is expressed as: stainless steel sheet / ZnPc / SiO 2 / ZnPc / SiO 2 / ZnPc / SiO 2 / Al / m-MTDATA / DPVBi / Bphen / Ag / ZnPc / SiO 2 / ZnPc / SiO 2 / ZnPc / SiO 2 .

[0096] The preparation steps are:

[0097] A stainless steel sheet with a thickness of 0.2mm is provided, cleaned and ready for use.

[0098] In a vacuum of 1×10 -3 In the vacuum coating system of Pa, the ZnPc film was prepared by thermal resistance evaporation on the surface of the stainless steel sheet at an evaporation rate of 1nm / s, and then SiO was prepared on the surface of the ZnPc film by electron beam evaporation at an evaporation rate of 2nm / s. 2 film. Repeat for ZnPc films and SiO 2 The preparation process of the film, the preparation of a total of 3 laye...

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Abstract

The invention discloses a flexible organic light emission diode, comprising a flexible substrate, a buffer layer, an anode, an organic light emission unit, a cathode and an encapsulated layer which are sequentially laminated. The buffer layer is formed by alternatively laminating an organic buffer film and an inorganic buffer film by three to five times. The material of the organic buffer film is copper phthalocyanine, or zinc phthalocyanine or platinum phthalocyanine. The material of the inorganic buffer film is silica or alumina. According to the flexible organic light emission diode, the buffer layer is formed by alternatively laminating the organic buffer film and the inorganic buffer film by three to five times, the organic buffer film reduces internal stress when the flexible substrate and the internal of the inorganic buffer film perform bending operation, the overall toughness of the buffer layer is improved, during the flexure operation, the buffer layer cannot fall off the flexible substrate easily, and the light emission stability of the flexible organic light emission diode is good. The invention also discloses a preparation method of the abovementioned organic light emission diode.

Description

technical field [0001] The invention relates to the field of organic electroluminescence, in particular to a flexible organic electroluminescence device and a preparation method thereof. Background technique [0002] Organic Light Emission Diode (OLED) has the characteristics of high brightness, wide range of material selection, low driving voltage, fully cured active light emission, etc., and has the advantages of high definition, wide viewing angle, and fast response speed. A display technology and light source with great potential, in line with the development trend of mobile communication and information display in the information age, and the requirements of green lighting technology, is the focus of many researchers at home and abroad. [0003] Flexible organic electroluminescent devices have advantages such as flexibility and portability. Stainless steel flakes can also be used as substrate materials for flexible organic electroluminescent devices, which have the adv...

Claims

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Application Information

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IPC IPC(8): H01L51/52H01L51/54H01L51/56
Inventor 周明杰冯小明张娟娟王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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