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White-light OLED (organic light emission diode) device and preparation method thereof

An electroluminescent device and a technology of a blue light-emitting layer, which are applied in circuits, electrical components, and electric solid-state devices, can solve problems such as difficult white light emission, and achieve the effects of increasing brightness, enhancing yellow light emission, and improving luminous efficiency

Inactive Publication Date: 2015-04-29
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

However, when using multi-layer light emitting, the change of the driving voltage often causes the distribution of the carriers to change, so that the distribution of the carriers in the multiple light-emitting layers changes, so that the light-emitting color changes with the voltage, and it is not easy to form stable white light emission

Method used

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  • White-light OLED (organic light emission diode) device and preparation method thereof
  • White-light OLED (organic light emission diode) device and preparation method thereof
  • White-light OLED (organic light emission diode) device and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0045] A method for preparing a white light organic electroluminescence device, comprising the following steps:

[0046] (1) Provide an ITO conductive glass with a sheet resistance of 5Ω / □ and clean it; prepare a color conversion layer on the side of the ITO conductive glass that is not covered with the ITO film (that is, the side of the glass substrate facing the air). Specifically, use a pre-established The mask plate is covered on the side of the conductive substrate that is not covered with ITO, forming blank areas arranged at intervals in strips, and the vacuum degree is 1×10 -5 In Pa's vacuum coating system, the red light color conversion layer is prepared in the blank area by thermal resistance evaporation technology, and the coverage area of ​​the red light color conversion layer on the glass substrate is 60% of the total light emitting area of ​​the glass substrate; the red light color conversion layer The materials include Alq3 and DCM doped in Alq3, wherein the mass...

Embodiment 2

[0056] A method for preparing a white light organic electroluminescence device, comprising the following steps:

[0057] (1) Provide an ITO conductive glass with a square resistance of 100Ω / □ and clean it; prepare a color conversion layer on the side of the ITO conductive glass that is not covered with the ITO film (that is, the side of the glass substrate facing the air). Specifically, use a pre-established The mask plate is covered on the side of the conductive substrate that is not covered with ITO to form blank areas arranged at intervals in blocks, and the vacuum degree is 1×10 -3 In the vacuum coating system of Pa, the red light color conversion layer is prepared in the blank area by thermal resistance evaporation technology, and the coverage area of ​​the red light color conversion layer on the glass substrate is 80% of the total light emitting area of ​​the glass substrate; the red light color conversion layer The materials include Alq3 and DCM doped in Alq3, wherein t...

Embodiment 3

[0066] A method for preparing a white light organic electroluminescence device, comprising the following steps:

[0067] (1) Provide an ITO conductive glass with a square resistance of 20Ω / □ and clean it; prepare a color conversion layer on the side of the ITO conductive glass that is not covered with the ITO film (that is, the side of the glass substrate facing the air). Specifically, use a pre-established The mask plate is covered on the side of the conductive substrate that is not covered with ITO to form blank areas arranged at intervals in blocks, and the vacuum degree is 1×10 -3 In the vacuum coating system of Pa, the red light color conversion layer is prepared in the blank area by thermal resistance evaporation technology, and the coverage area of ​​the red light color conversion layer on the glass substrate is 70% of the total light emitting area of ​​the glass substrate; the red light color conversion layer The materials include Alq3 and DCM doped in Alq3, wherein th...

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Abstract

The invention provides a white-light OLED (organic light emission diode) device. The device comprises a conductive anode substrate as well as a hole-transmission layer, a blue light emitting layer, an electronic transmission layer and a cathode which are stacked on the conductive anode substrate sequentially, wherein the conductive anode substrate comprises a glass substrate and a conductive anode arranged on the glass substrate, color conversion layers are arranged on one surface, facing air, of the glass substrate and comprise red light color conversion layers arranged at intervals in a strip-shaped manner or in a block manner as well as yellow light color conversion layers covering the surfaces of the red light color conversion layers and the surface of the glass substrate; materials of the red light conversion layer comprise a red light fluorescent material and a red light host material; materials of the yellow light color conversion layer comprise a yellow light fluorescent material and a photocuring adhesive; the light absorption wavelength peak of a blue light fluorescent material of the blue light emitting layer ranges from 460 nm to 470 nm. The white-light OLED device can realize emission of white light with stable light color, and the light emitting efficiency is high. The invention further provides a preparation method of the white-light OLED device.

Description

technical field [0001] The invention relates to an organic electroluminescence device, in particular to a white light organic electroluminescence 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 devices, in order to form white light emission, there are various combinations of light-emitting layers, such as multi-color mixed light-emitt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/54H01L51/56
Inventor 周明杰冯小明钟铁涛王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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