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Organic electroluminescent device and preparation method

An electroluminescent device and luminescent technology, which is applied in the direction of electric solid-state devices, semiconductor/solid-state device manufacturing, electrical components, etc., can solve the problems of light loss, poor refractive index, low light performance, etc., to reduce total emission and improve Light efficiency, avoiding the effect of total reflection phenomenon

Inactive Publication Date: 2014-08-27
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In traditional light-emitting devices, the glass substrate of indium tin oxide transparent conductive film (ITO) is generally used as the light-emitting surface. Absorption and reflection can finally be emitted into the air, but there is a difference in refractive index between the glass and ITO interface, which will cause total reflection of light when it reaches the glass from ITO, resulting in loss of light output, resulting in lower overall light output performance

Method used

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  • Organic electroluminescent device and preparation method

Examples

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Embodiment 1

[0099] A method for preparing an organic electroluminescent device, comprising the following steps:

[0100] (1) After rinsing the N-LASF44 glass with distilled water and ethanol, soak it in isopropanol for one night to obtain a clean glass substrate;

[0101] (2) In the high-vacuum coating system (Shenyang Scientific Instrument Development Center Co., Ltd.), carbon aerogel with a particle size of 20nm was added to the PEDOT:PSS aqueous solution at a mass fraction of 15% to obtain a mixed solution, which was mixed at a speed of 3000rpm The mixed solution was spin-coated for 20 s on a clean glass substrate, and then dried at 100 °C for 30 min to obtain a carbon airgel layer with a thickness of 25 μm. The mass fraction of PEDOT in the PEDOT:PSS aqueous solution was 3.5%, and PEDOT and The mass ratio of PSS is 3:1;

[0102] ZnO with a particle size of 80nm is placed on the carbon airgel layer by electron beam evaporation to obtain a zinc oxide layer with a thickness of 100nm, wh...

Embodiment 2

[0112] A method for preparing an organic electroluminescent device, comprising the following steps:

[0113] (1) After rinsing the N-LAF36 glass with distilled water and ethanol, soak it in isopropanol for one night to obtain a clean glass substrate;

[0114] (2) In the high vacuum coating system (Shenyang Scientific Instrument Development Center Co., Ltd.), carbon airgel with a particle size of 10nm was added to the PEDOT:PSS aqueous solution at a mass fraction of 20% to obtain a mixed solution, which was mixed at a speed of 2000rpm. The mixed solution was spin-coated for 10 s on a clean glass substrate, and then dried at 50 °C for 40 min to obtain a carbon airgel layer with a thickness of 30 μm. The mass fraction of PEDOT in the PEDOT:PSS aqueous solution was 1%, and PEDOT and The mass ratio of PSS is 2:1;

[0115] ZnO with a particle size of 200nm is placed on the carbon airgel layer by electron beam evaporation to obtain a zinc oxide layer with a thickness of 20nm, wherei...

Embodiment 3

[0121] A method for preparing an organic electroluminescent device, comprising the following steps:

[0122] (1) After rinsing the N-LASF31A glass with distilled water and ethanol, soak it in isopropanol for one night to obtain a clean glass substrate;

[0123] (2) In the high vacuum coating system (Shenyang Scientific Instrument Development Center Co., Ltd.), carbon airgel with a particle size of 100nm was added to the PEDOT:PSS aqueous solution at a mass fraction of 1% to obtain a mixed solution, which was mixed at a speed of 6000rpm The mixed solution was spin-coated for 60 s on a clean glass substrate, and then dried at 200 °C for 15 min to obtain a carbon airgel layer with a thickness of 10 μm. The mass fraction of PEDOT in the PEDOT:PSS aqueous solution was 5%, and PEDOT and The mass ratio of PSS is 6:1;

[0124] ZnO with a particle size of 50nm is placed on the carbon airgel layer by electron beam evaporation to obtain a zinc oxide layer with a thickness of 200nm, wher...

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Abstract

The invention discloses an organic electroluminescent device and its preparation method. A carbon aerogel layer and a zinc oxide layer are successively prepared between a glass substrate and an anode to be used as a light extraction layer. Thus, light which is originally emitted to two sides of the anode returns to the bottom of the device through scattering, and total reflection is avoided. Then, luminous efficiency of the device is raised. The preparation method is simple and easy to control and operate, and raw materials are easily available.

Description

technical field [0001] The invention belongs to the field of organic electroluminescence, and in particular relates to an organic electroluminescence device and a preparation method thereof. Background technique [0002] An organic electroluminescent device (OLED) is an energy conversion device that uses organic materials as light-emitting materials and can convert applied electrical energy into light energy. It has outstanding performances such as ultra-thin, self-luminous, fast response, low power consumption, etc., and has extremely broad application prospects in display, lighting and other fields. [0003] The structure of organic electroluminescent devices is a sandwich structure, with one or more organic thin films sandwiched between the cathode and the conductive anode. In a device with a multi-layer structure, the inside of the two poles mainly includes a light emitting layer, an injection layer and a transport layer. The organic electroluminescent device is a carr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/52H01L51/56H10K99/00
CPCH10K77/10H10K50/85H10K50/854H10K71/00Y02E10/549Y02P70/50
Inventor 周明杰王平黄辉
Owner STATE GRID CORP OF CHINA
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