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Organic electroluminescent device and preparation method

An electroluminescence device and luminescence 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 poor refractive index, loss of light output, low light output performance, etc.

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
  • Organic electroluminescent device and preparation method

Examples

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Embodiment 1

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

[0101] (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;

[0102] (2) In a high-vacuum coating system (Shenyang Scientific Instrument Development Center Co., Ltd.), spin-coat PEDOT:PSS aqueous solution at a speed of 4000rpm for 15s on a clean glass substrate, and then dry it at 100°C for 15min to obtain the thickness Be the polymer layer of 50nm, wherein, the massfraction of PEDOT in PEDOT:PSS aqueous solution is 3.5%, the weight ratio of PEDOT and PSS is 3:1;

[0103] HfO 2 :SiO2 2 The mixture was deposited on the polymer layer by electron beam evaporation to obtain a scattering layer with a thickness of 200 nm, where HfO 2 :SiO2 2 The mixture is HfO 2 According to the mass fraction of 40% doped to SiO 2 The mixture formed in , the condition of electron beam evaporation is energ...

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 a high-vacuum coating system (Shenyang Scientific Instrument Development Center Co., Ltd.), spin-coat PEDOT:PSS aqueous solution at a speed of 6000rpm for 30s on a clean glass substrate, and then dry it at 200°C for 10min to obtain the thickness Be the polymer layer of 20nm, wherein, the massfraction of PEDOT in PEDOT:PSS aqueous solution is 1%, the weight ratio of PEDOT and PSS is 2:1;

[0115] Will Nb 2 o 5 : The SiO mixture is deposited on the polymer layer by electron beam evaporation to obtain a scattering layer with a thickness of 50nm, where Nb 2 o 5 : SiO mixture as Nb 2 o 5 According to the mixture formed by doping SiO with 50% mass fraction, the condition of electron beam evaporation is energy densi...

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 a high vacuum coating system (Shenyang Scientific Instrument Development Center Co., Ltd.), spin-coat PEDOT:PSS aqueous solution at a speed of 2000rpm for 10s on a clean glass substrate, and then dry it at 50°C for 30min to obtain the thickness Be the polymer layer of 80nm, wherein, the massfraction of PEDOT in PEDOT:PSS aqueous solution is 10%, the weight ratio of PEDOT and PSS is 6:1;

[0124] Will Ta 2 o 5 : The SiO mixture is deposited on the polymer layer by electron beam evaporation to obtain a scattering layer with a thickness of 500nm, where Ta 2 o 5 :SiO mixture is Ta 2 o 5 According to the mixture formed by doping SiO with 10% mass fraction, the condition of electron beam evaporation is energy den...

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Abstract

The invention discloses an organic electroluminescent device and its preparation method. A polymer layer is firstly prepared on a glass substrate, thus reducing refractive index difference between the glass substrate and the air. A scattering layer is prepared on the polymer layer. Then, light which reaches a polymer can be scattered, and light which is emitted to two sides can return to the middle. Thus, luminous efficiency is raised. Transmission band of silicon oxide is wide, and silicon oxide has a high anti-reflection effect. Refractive index difference between the polymer layer and the air also can be further minimized, total reflection probability is reduced, and more light is 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
CPCH10K71/16H10K71/166H10K71/12H10K85/1135H10K50/854
Inventor 周明杰王平黄辉
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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