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Anode modification method for improving properties of organic electroluminescent device

An electroluminescent device, anode modification technology, applied in the direction of electric solid-state devices, electrical components, semiconductor devices, etc., can solve the problems of low and limited mobility, inhibition of the preparation process and wide application, etc., to improve the hole injection barrier, The effect of increasing brightness

Active Publication Date: 2013-01-02
GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology generally inserts a hole blocking layer on the cathode side to increase the confinement of carriers and excitons, improve the recombination probability of excitons and device performance, but due to the low mobility of electrons in the hole blocking layer, the hole The barrier layer will significantly increase the operating voltage of the device while improving performance
In addition, there are also a small number of research institutions that insert the hole blocking layer on the anode side. In this case, the increase in operating voltage is not obvious, but this technology is now mainly used in evaporation-type small molecule OLED devices, and this technology can be applied The material of the hole blocking layer is very limited, and the preparation process adopts thermal evaporation process. The complicated preparation process and the limitation of application range greatly inhibit the wide use of this technology, and the improvement of device performance is not obvious.

Method used

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  • Anode modification method for improving properties of organic electroluminescent device
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  • Anode modification method for improving properties of organic electroluminescent device

Examples

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Effect test

Embodiment 1

[0022] An anode modification method for improving the performance of organic electroluminescent devices is: contacting the hole injection layer with methanol or ethanol. In this embodiment, specifically, the organic electroluminescent device is a PLED, and the PLED The preparation method is as follows (including the steps of the anode modification method, and further detailed description of the steps):

[0023] (1) Cleaning and drying of ITO glass substrate

[0024] ITO glass square resistance ~ 20Ω / □, size 15mm×15mm square piece.

[0025] The following steps are used to clean the ITO glass: acetone → isopropanol → special detergent for micron semiconductors (a mixed solution of ZT-3 electronic washing liquid and deionized water with a volume ratio of 1:100) → two times of deionized water → new Ultrasonic cleaning with isopropanol for 10 minutes each, and drying in a constant temperature oven for two hours for later use. Before use, the ITO clean film needs to be in O 2 T...

Embodiment 2

[0043] An anode modification method for improving the performance of organic electroluminescent devices is: contacting the hole injection layer with methanol or ethanol. In this embodiment, specifically, the organic electroluminescent device is a PLED, and the PLED The preparation method is as follows (including the steps of the anode modification method, and further detailed description of the steps):

[0044] (1) Cleaning and drying of ITO glass substrate

[0045] ITO glass square resistance ~ 20Ω / □, size 15mm×15mm square piece.

[0046] We use the following steps to clean ITO glass: acetone → isopropanol → special detergent for micron semiconductors (a mixed solution of ZT-3 electronic washing liquid and deionized water with a volume ratio of 1:100) → two times of deionized water → Each new isopropanol was ultrasonically cleaned for 10 minutes, and dried in a constant temperature oven for two hours for later use. Before use, the ITO clean film needs to be in O 2 The tr...

Embodiment 3

[0065] An anode modification method for improving the performance of organic electroluminescent devices is: contacting the hole injection layer with methanol or ethanol. In this embodiment, specifically, the organic electroluminescent device is a PLED, and the PLED The preparation method is as follows (including the steps of the anode modification method, and further detailed description of the steps):

[0066] (1) Cleaning and drying of ITO glass substrate

[0067] ITO glass square resistance ~ 20Ω / □, size 15mm×15mm square piece.

[0068] We use the following steps to clean ITO glass: acetone → isopropanol → special detergent for micron semiconductors (a mixed solution of ZT-3 electronic washing liquid and deionized water with a volume ratio of 1:100) → two times of deionized water → Each new isopropanol was ultrasonically cleaned for 10 minutes, and dried in a constant temperature oven for two hours for later use. Before use, the ITO clean film needs to be in O 2 The tr...

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Abstract

An anode modification method for improving properties of an organic electroluminescent device is used for carrying out contact processing to a hole injection layer with a solvent. Hole injection potential barrier can be improved by carrying out simple contact processing on the hole injection layer of a polymer electroluminescent device through utilizing the solvent, so that holes can be effectively blocked at one side of an anode, balance between the electrons and holes in an organic luminescent layer can be realized, and finally the brightness, efficiency and stability of the device can be obviously enhanced on the basis of not sacrificing the work voltage.

Description

technical field [0001] The invention relates to an anode modification method for improving the performance of an organic electroluminescent device. Background technique [0002] In the 21st century, people have higher and higher requirements for flat panel display technology. Although the widely used liquid crystal display has made considerable improvements to the traditional technology, it has some insurmountable shortcomings, such as small viewing angle, low brightness, Passive luminescence, poor temperature characteristics, etc., greatly restrict the further development of liquid crystal technology, and cannot meet the needs of the growing information age. Organic light-emitting diode (OLED) came into being under such conditions. It has the characteristics of wide viewing angle, self-luminescence, low working voltage, can be used for flexible display, and can realize large-area and low-cost preparation. OLED technology The emerging flat panel display industry, which has ...

Claims

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Application Information

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IPC IPC(8): H01L51/56
Inventor 汪青彭俊彪王坚陈亚文艾娜韩绍虎董婷胡典钢
Owner GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD