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Organic electroluminescent device and manufacturing method thereof

An electroluminescent device and luminescent technology, which is applied in the manufacture of organic semiconductor devices, electric solid devices, semiconductor/solid state devices, etc., can solve the problems of light loss, poor refractive index, and low light performance

Inactive Publication Date: 2014-09-17
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

[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 manufacturing method thereof
  • Organic electroluminescent device and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0090] A method for preparing an organic electroluminescent device, comprising the following steps:

[0091] (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;

[0092] (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, CBP is thermally resistively deposited on one side of a clean glass substrate at a deposition rate of 3nm / s to prepare a crystalline layer with a thickness of 20nm;

[0093] Will Re 2 o 7 Mix with LiF at a mass ratio of 20:3, add to water to obtain a lithium salt mixed solution, the mass fraction of lithium salt is 3%, Re 2 o 7The mass fraction accounted for is 20%, the lithium salt mixed solution is spin-coated on the glass, the rotating speed is 4000rpm, and the time is 15s, and then dried at 200°C to obtain a scattering layer with a thickness of 50nm;

[0094] (3)...

Embodiment 2

[0100] A method for preparing an organic electroluminescent device, comprising the following steps:

[0101] (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;

[0102] (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 OXD-7 on one side of a clean glass substrate at a vapor deposition rate of 1nm / s to prepare a crystalline layer with a thickness of 10nm;

[0103] Will Re 2 o 7 with Li 2 CO 3 Mixing with a mass ratio of 20:1, adding in ethanol to obtain a lithium salt mixed solution, the mass fraction of lithium salt is 1%, Re 2 o 7 The mass fraction accounted for is 20%, the lithium salt mixed solution is spin-coated on the glass, the rotating speed is 5000rpm, and the time is 30s, and then dried at 100°C to obtain a scattering layer with a th...

Embodiment 3

[0109] (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;

[0110] (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, mCP was thermally resistively evaporated on one side of a clean glass substrate with an evaporation rate of 10nm / s to prepare a crystalline layer with a thickness of 40nm;

[0111] Will Re 2 o 7 with Li 2 O is mixed with a mass ratio of 1:1, and is added in isopropanol to obtain a lithium salt mixed solution, and the mass fraction of lithium salt is 5%, Re 2 o 7 The mass fraction accounted for is 5%, and the lithium salt mixed solution is spin-coated on the glass, the rotating speed is 3000rpm, the time is 10s, and then dried at 200°C to obtain a scattering layer with a thickness of 80nm;

[0112] (3) The acceleration voltage is 800V, the magnetic field is 200G, and...

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Abstract

The invention provides an organic electroluminescent device and a manufacturing method thereof. According to the organic electroluminescent device, a scattering layer is prepared between an anode and a base board, rhenium heptoxide and lithium salt are mixed, so light is made to scatter, the lithium salt can improve integral stability of the scattering layer and makes light emitted from a side direction be guided to glass after scattering, and incident light is improved. A crystallization layer is prepared at a back face of a glass base and can make light from the base board to the air scatter, outgoing light is reinforced, an incident angle is changed, and thereby the total reflection probability is reduced, and light emitting efficiency is improved. The organic electroluminescent device has a simple manufacturing method and is easy to control and operate, and raw materials are easy to acquire.

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
CPCH10K85/624H10K50/854H10K2102/00H10K71/00
Inventor 周明杰王平黄辉
Owner OCEANS KING LIGHTING SCI&TECH CO LTD