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Organic electroluminescent device and preparation method

An electroluminescent device and electroluminescent technology, applied in the direction of electric solid device, semiconductor/solid state device manufacturing, electrical components, etc., can solve the problems of refractive index difference, light loss, low light output performance, etc., to improve light output efficiency, avoid The effect of the phenomenon of total reflection

Inactive Publication Date: 2014-08-27
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

[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

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  • Organic electroluminescent device and preparation method

Examples

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Embodiment 1

[0081] A method for preparing an organic electroluminescent device, comprising the following steps:

[0082] (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;

[0083] (2) In the high vacuum coating system (Shenyang Scientific Instrument Development Center Co., Ltd.), the pressure is 5×10 -4 Under the condition of Pa, thermal resistance vapor deposition of Ta on one side of a clean glass substrate at a deposition rate of 4nm / s 2 o 5 Prepare a light extraction layer with a thickness of 150nm. On the other side of the glass substrate, thermally resistively evaporate a mixture of Au:CuO to prepare an anode with a thickness of 10nm. The Au:CuO mixture is formed by doping CuO into Au at a mass fraction of 30%. mixture;

[0084] (3) At a pressure of 5×10 -4 Under the condition of Pa, the hole injection layer, the hole transport layer, the light emitting layer and the electron transport l...

Embodiment 2

[0092] A method for preparing an organic electroluminescent device, comprising the following steps:

[0093] (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;

[0094] (2) In the high vacuum coating system (Shenyang Scientific Instrument Development Center Co., Ltd.), the pressure is 2×10 -3 Under the condition of Pa, thermal resistance evaporation of Nb on one side of a clean glass substrate with an evaporation rate of 1nm / s 2 o 5 Prepare a light extraction layer with a thickness of 200nm, and thermally resistively evaporate Pt:Ag on the other side of the glass substrate 2 O mixture to prepare anode with a thickness of 5nm, where Pt:Ag 2 O mixture for the Ag 2 A mixture formed by doping O into Pt according to 50% mass fraction;

[0095] (3) At a pressure of 2×10 -3 Under the condition of Pa, the hole injection layer, the hole transport layer, the light emitting layer and the elec...

Embodiment 3

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

[0100] (1) After rinsing the N-LASF41 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.), the pressure is 5×10 -5 Under the condition of Pa, thermal resistance vapor deposition of VO on one side of a clean glass substrate at a deposition rate of 10nm / s 2 Prepare a light extraction layer with a thickness of 50nm, and thermally resistively evaporate Ag:Cu on the other side of the glass substrate 2 O mixture to prepare anode with a thickness of 20nm, where Ag:Cu 2 O mixture is the Cu 2 A mixture formed by doping O into Ag according to the mass fraction of 20%;

[0102] (3) At a pressure of 5×10 -5 Under the condition of Pa, the hole injection layer, the hole transport layer, the light emitting layer and the ...

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Abstract

The invention discloses an organic electroluminescent device and its preparation method. A mixed material formed by platinum-group metal oxide and aluminum or precious metal is used as an anode material; optical glass with its refractive index being greater than 1.8 is used as a substrate; and a light extraction layer which matches the glass substrate is prepared on the back of the glass substrate. The light extraction layer has a good scattering effect on light. Thus, total reflection of light being emitted from the glass substrate into the air can be reduced, and light can be effectively emitted to the air. 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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IPC IPC(8): H01L51/52H01L51/54H01L51/56
CPCH10K50/854
Inventor 周明杰王平黄辉
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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