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

An electroluminescent device, a technology of blue light-emitting layer, applied in the direction of circuits, electrical components, electric solid-state devices, etc., can solve problems such as difficult white light emission, and achieve the effects of light color stability, high color rendering performance, and high 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

Examples

Experimental program
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Effect test

Embodiment 1

[0040] A method for preparing a white light organic electroluminescence device, comprising the following steps:

[0041] (1) Provide the glass substrate and clean it;

[0042] (2) In a vacuum of 1×10 -5 In Pa's vacuum coating system, thermal resistance evaporation technology is used to sequentially prepare the first red light color conversion layer, transparent anode, hole transport layer, blue light emitting layer, electron transport layer, cathode and second red light color conversion layer on one surface of the glass substrate. color conversion layer to obtain a white light organic electroluminescent device;

[0043] Specifically, first prepare the first red light color conversion layer on the surface of the glass substrate, the material includes Alq3 and DCM doped in Alq3, wherein the mass ratio of DCM to Alq3 is 1:100, the first red light color conversion layer The thickness is 400nm, the evaporation rate of DCM is 0.01nm / s, and the evaporation rate of Alq3 is 1nm / s; th...

Embodiment 2

[0050] A method for preparing a white light organic electroluminescence device, comprising the following steps:

[0051] (1) Provide the glass substrate and clean it;

[0052] (2) In a vacuum of 1×10 -3 In Pa's vacuum coating system, thermal resistance evaporation technology is used to sequentially prepare the first red light color conversion layer, transparent anode, hole transport layer, blue light emitting layer, electron transport layer, cathode and second red light color conversion layer on one surface of the glass substrate. color conversion layer to obtain a white light organic electroluminescent device;

[0053] Specifically, first prepare the first red light color conversion layer on the surface of the glass substrate, the material includes TPBi and DCM doped in TPBi, wherein the mass ratio of DCM to TPBi is 10:100, the first red light color conversion layer The thickness is 100nm, the evaporation rate of DCM is 0.01nm / s, and the evaporation rate of TPBi is 0.1nm / s;...

Embodiment 3

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

[0060] (1) Provide the glass substrate and clean it;

[0061] (2) In a vacuum of 1×10 -4 In Pa's vacuum coating system, thermal resistance evaporation technology is used to sequentially prepare the first red light color conversion layer, transparent anode, hole transport layer, blue light emitting layer, electron transport layer, cathode and second red light color conversion layer on one surface of the glass substrate. color conversion layer to obtain a white light organic electroluminescent device;

[0062] Specifically, first prepare the first red light color conversion layer on the surface of the glass substrate, the material includes Alq3 and DCM doped in Alq3, wherein the mass ratio of DCM to Alq3 is 5:100, the thickness of the first red light color conversion layer 200nm, wherein the evaporation rate of DCM is 0.1nm / s, and the evaporation rate of Alq3 is 2n...

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Abstract

The invention provides a white-light OLED (organic light emission diode) device. The device comprises a glass substrate as well as a first red light color conversion layer, a transparent anode, a hole-transmission layer, a blue light emitting layer, an electronic transmission layer, a cathode and a second red light color conversion layer which are stacked sequentially, wherein the materials of both the first red light color conversion layer and the second red light color conversion layer comprise red light fluorescent materials and red light host materials whose mass ratio is (1-10) :100, and the light absorption wavelength peak of the red light fluorescent materials 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 whose mass ratio is (1-10) :100, and the light absorption wavelength peak of the blue light fluorescent material ranges from 460 nm to 470 nm; the material of the transparent anode adopts metal gold or silver. The white-light OLED device can realize emission of white light with stable light color. 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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IPC IPC(8): H01L51/50H01L51/52H01L51/54H01L51/56
CPCH10K85/00H10K50/11H10K71/00
Inventor 周明杰冯小明钟铁涛王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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