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

An electroluminescent device and blue light emitting layer technology, applied in circuits, electrical components, electrical solid devices, etc., can solve the problem of difficult white light emission and the like, and achieve a light-color stability suitable for industrialized large-scale use, simple preparation process, etc. Effect

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

Examples

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Effect test

Embodiment 1

[0041] A method for preparing a white light organic electroluminescence device, comprising the following steps:

[0042] (1) Provide an ITO conductive glass with a sheet resistance of 5Ω / □ and clean it; prepare a red color conversion layer with a thickness of 80 μm 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). DCM is dissolved with solvent dichloromethane to obtain a solution with a mass concentration of 20%, and then the resulting solution is added to the polyacrylate light-curing adhesive, and ceramic nano-titanium dioxide particles are added at the same time. The particle size of the titanium dioxide particles is 500nm. DCM and The mass ratio of polyacrylate is 0.2:100, the mass ratio of nano-titanium dioxide particles to polyacrylate is 5:100, and the dispersion and stirring are continued for 0.5 hours to obtain a mixed slurry. Then use screen printing technology to coat the mixed sl...

Embodiment 2

[0051] A method for preparing a white light organic electroluminescence device, comprising the following steps:

[0052] (1) Provide ITO conductive glass with a sheet resistance of 100Ω / □ and clean it; prepare a red light color conversion layer with a thickness of 20 μm 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, DCM is dissolved with dichloromethane as a solvent to obtain a solution with a mass concentration of 20%, and then the resulting solution is added to the polyacrylate light-curing adhesive, and ceramic nano-silica particles are added at the same time. The particle size is 50nm, the mass ratio of DCM to polyacrylate is 2:100, and the mass ratio of silicon dioxide to polyacrylate is 40:100, and the dispersion and stirring are continued for 1 hour to obtain a mixed slurry. Then use screen printing technology to coat the mixed slurry on the side of the conductive gla...

Embodiment 3

[0059] A method for preparing a white light organic electroluminescence device, comprising the following steps:

[0060] (1) Provide ITO conductive glass with a sheet resistance of 20Ω / □, and clean it; prepare a red color conversion layer with a thickness of 50 μm 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, DCM is dissolved with dichloromethane as a solvent to obtain a solution with a mass concentration of 20%, and then the resulting solution is added to the epoxy resin photocuring adhesive, and ceramic nano-silica particles are added at the same time. The particle size is 100nm, the mass ratio of DCM to epoxy resin is 1:100, and the mass ratio of silicon dioxide to epoxy resin is 20:100, and the mixed slurry is obtained by continuous dispersion and stirring for 0.8 hours. Then use screen printing technology to coat the mixed slurry on the side of the conductive glass tha...

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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, and a red light color conversion layer is arranged on one surface, facing air, of the glass substrate; materials of the red light color conversion layer comprise a red light fluorescent material, scattering nanoparticles and a photocuring adhesive, and the light absorption wavelength peak of the red light fluorescent material ranges from 460 nm to 470 nm; the materials of the blue light emitting layer comprise a blue light fluorescent material and a blue light host material, and the light absorption wavelength peak of the blue light fluorescent material 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 can be improved by means of the red light color conversion layer. 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): H01L51/50H01L51/52H01L51/54H01L51/56
CPCH10K50/125
Inventor 周明杰冯小明钟铁涛王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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