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Organic electroluminescent device and preparation method thereof

An electroluminescent device and electroluminescent technology, which are applied in the fields of electro-solid devices, semiconductor/solid-state device manufacturing, electrical components, etc., can solve the mismatch of the refractive index of the anode material and the glass substrate, the low light-emitting efficiency of the OLED light-emitting device, and the transmission efficiency. lower problem

Inactive Publication Date: 2015-03-18
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

[0003] In the prior art OLED light-emitting device, due to the mismatch of the refractive index between the anode material and the glass substrate, for example, the refractive index of ITO can reach 2.1, while the ordinary glass substrate is only about 1.6, resulting in light generated at the interface between ITO and the glass substrate. The critical angle of total reflection is very small, so that the transmission efficiency of light from ITO to the glass substrate is low, which is also an important reason for the low light output efficiency of OLED light-emitting devices in the prior art

Method used

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  • Organic electroluminescent device and preparation method thereof
  • Organic electroluminescent device and preparation method thereof
  • Organic electroluminescent device and preparation method thereof

Examples

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Embodiment 1

[0057] A method for preparing an organic electroluminescent device, comprising the following steps:

[0058] (1) Provide a transparent glass substrate and a mask plate, the mask plate is attached to the surface of the glass substrate; place the glass substrate on a 1×10 -5 In the vacuum coating chamber of Pa, the magnetron sputtering method is used to prepare 7 oxide layers arranged side by side and spaced apart on the side of the glass substrate attached with the mask plate. The material is titanium dioxide, and the sputtering speed is 0.5nm / s; The material layer is strip-shaped, with a thickness of 5 μm and a width of 5 μm, and the interval between two adjacent oxide layers is 5 μm;

[0059] (2) Remove the mask, and prepare a sulfide layer on the surface of the glass substrate and the surface of the oxide layer by vacuum hot-coating method. The material is zinc sulfide, and the evaporation speed is 0.2nm / s; the sulfide layer is a continuous film layer with a wavy surface st...

Embodiment 2

[0067] A method for preparing an organic electroluminescent device, comprising the following steps:

[0068] (1) Provide a transparent glass substrate and a mask plate, the mask plate is attached to the surface of the glass substrate; place the glass substrate on a 1×10 -3 In the vacuum coating chamber of Pa, the magnetron sputtering method is used to prepare 7 oxide layers arranged side by side and arranged at intervals on the side of the glass substrate attached with the mask plate. The material is silicon dioxide, and the sputtering speed is 5nm / s; The oxide layer is strip-shaped, with a thickness of 20 μm and a width of 20 μm, and the interval between two adjacent oxide layers is 20 μm;

[0069] (2) Remove the mask, and prepare a sulfide layer on the surface of the glass substrate and the surface of the oxide layer by vacuum hot-coating method. The material is zinc selenide, and the evaporation speed is 2nm / s; the sulfide layer is a continuous film A layer with a wavy sur...

Embodiment 3

[0075] A method for preparing an organic electroluminescent device, comprising the following steps:

[0076] (1) Provide a transparent glass substrate and a mask plate, the mask plate is attached to the surface of the glass substrate; place the glass substrate on a 1×10 -4 In the vacuum coating chamber of Pa, 7 oxide layers arranged side by side and arranged at intervals are prepared on the side of the glass substrate with the mask plate by magnetron sputtering method. The material is zirconium dioxide, and the sputtering speed is 2nm / s; The oxide layer is strip-shaped, with a thickness of 10 μm and a width of 10 μm, and the interval between two adjacent oxide layers is 10 μm;

[0077] (2) Remove the mask, and prepare a sulfide layer on the surface of the glass substrate and the surface of the oxide layer by vacuum hot-coating method. The material is zinc sulfide, and the evaporation speed is 1nm / s; the sulfide layer is a continuous film layer , with a wavy surface structure ...

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Abstract

The invention provides an organic electroluminescent device, including a light transmission substrate, and a light extraction layer, an anode, an organic luminous functional layer and a cathode which are stacked on the light transmission substrate in sequence. The light extraction layer includes a plurality of oxide layers parallelly arranged on the surface of the light transmission substrate at intervals, a sulfide layer that covers the surfaces of the light transmission substrate and the oxide layers, and a transparent polymer film that covers the surface of the sulfide layer, the oxide layers are in the shapes of long strips, oxides are one or more of titanium dioxide, silicon dioxide and zirconium dioxide, the thickness of the oxide layers is 5 to 10 [mu]m, and the sulfide layer is a continuous thin film layer and has a wave-shaped curved surface structure. According to the organic electroluminescent device, through the arrangement of the light extraction layer, a critical angle of total reflection of an interface of the light transmission substrate is increased, thereby increasing the light extraction efficiency between the light transmission substrate and the anode, and improving the luminous efficiency of the device. The invention also provides a preparation method of the organic electroluminescent device.

Description

technical field [0001] The invention relates to an organic electroluminescent device, in particular to an organic electroluminescent device and a preparation method thereof. Background technique [0002] Organic Light Emission Diode, hereinafter referred to as 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. It is a display technology and light source with great potential, which conforms to the development trend of mobile communication and information display in the information age, as well as the requirements of green lighting technology, and is the focus of many researchers at home and abroad. [0003] In the prior art OLED light-emitting device, due to the mismatch of the refractive index between the anode material and the glass substrate, for example, the refractive index of ITO can reach ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/52H01L51/56
CPCH10K71/13H10K50/858
Inventor 周明杰冯小明张娟娟王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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