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Red organic electroluminescent device and preparation method thereof

An electroluminescence and red technology, applied in the field of red organic electroluminescence devices and their preparation, can solve the problem of high device operating voltage and achieve the effects of low dependence, high color purity and high spectral stability

Active Publication Date: 2015-01-07
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The efficiency degradation of the device has been greatly alleviated, but the device still has the problem of high operating voltage

Method used

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  • Red organic electroluminescent device and preparation method thereof
  • Red organic electroluminescent device and preparation method thereof
  • Red organic electroluminescent device and preparation method thereof

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preparation example Construction

[0072] The present invention also provides a method for preparing a red organic light-emitting device described in the above technical solution, comprising the following steps:

[0073] providing an anode layer on the substrate;

[0074] On the surface of the anode layer, an anode modification layer, a hole transport-electron blocking layer, a hole-dominated light-emitting layer, an electron-dominated light-emitting layer, a hole block-electron transport layer, a cathode modification layer and a cathode layer are sequentially evaporated to obtain a red organic Light emitting devices.

[0075] The invention provides a substrate on which an anode layer is provided. In the present invention, the substrate is consistent with the substrate described in the above technical solution, and will not be repeated here. In the present invention, the anode material provided on the substrate is preferably etched to form a strip electrode on the substrate, and an anode layer is obtained on ...

Embodiment 1

[0093] First, the ITO anode layer on the ITO glass is laser-etched into a strip electrode, and then ultrasonically cleaned with cleaning solution and deionized water for 15 minutes and dried in an oven; then the dried substrate is placed in a pre-treatment vacuum Chamber, under the atmosphere with a vacuum degree of 10Pa, the ITO anode is subjected to low-pressure plasma treatment with a voltage of 400 volts for 3 minutes, and then transferred to the organic evaporation chamber;

[0094] In a vacuum of 1×10 -5 Pa~2×10 -5 In the organic evaporation chamber of Pa, 3nm thick MoO was sequentially evaporated on the ITO layer at a rate of 0.01nm / s 3 Anode modification layer 3; TAPC hole transport-electron blocking layer 4 with a thickness of 40nm is evaporated at a rate of 0.05nm / s; PQ is evaporated at a rate of 0.002nm / s 2 Ir (dpm) and TcTa were evaporated at a rate of 0.05nm / s to obtain a 10nm thick hole-dominated light-emitting layer 5; FK306 was evaporated at a rate of 0.0001n...

Embodiment 2

[0102] First, the ITO anode layer on the ITO glass is laser-etched into strip electrodes, and then ultrasonically cleaned with cleaning solution and deionized water for 15 minutes and dried in an oven. Then put the dried substrate into the pretreatment vacuum chamber, and then transfer the ITO anode to the organic evaporation chamber after a 3-minute low-pressure plasma treatment with a voltage of 400 volts in an atmosphere with a vacuum degree of 10 Pa;

[0103] In a vacuum of 1×10 -5 Pa~2×10 -5 In the organic evaporation chamber of Pa, 3nm thick MoO was sequentially evaporated on the ITO layer at a rate of 0.01nm / s 3 Anode modification layer 3; TAPC hole transport-electron blocking layer 4 with a thickness of 40nm is evaporated at a rate of 0.05nm / s; PQ is evaporated at a rate of 0.002nm / s 2 Ir (dpm) and mCP were evaporated at a rate of 0.05nm / s to obtain a hole-dominated light-emitting layer 5 with a thickness of 10nm; FK306 was evaporated at a rate of 0.0001nm / s, and PQ ...

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Abstract

The invention provides a red organic electroluminescent device which comprises a substrate, an anode layer, an anode modification layer, a hole transport-electronic barrier layer, a hole leading luminescent layer, an electronic leading luminescent layer, a hole barrier-electronic transport layer, a cathode modification layer and a cathode layer which are sequentially arranged. The electronic leading luminescent layer comprises 0.05 weight percent to 2.0 weight percent of organic sensitized material, 1.0 weight percent to 8.0 weight percent of red organic luminescent material and the balance of electronic organic main body material, wherein the organic sensitized material is a transition metal complex with matched energy level. According to the invention, the organic sensitized material is doped in the electronic leading luminescent layer, the organic sensitized material takes effects of a charge carrier deep restraint center and an energy transfer step and is beneficial for balancing distribution of charge carriers, widening a luminous interval of the device and accelerating energy transfer from the main body material to the luminescent material so as to improve efficiency of the device and reduce a working voltage of the device.

Description

technical field [0001] The invention relates to the technical field of electroluminescence, in particular to a red organic electroluminescence device and a preparation method thereof. Background technique [0002] An organic electroluminescent device is a self-luminous device that generates light when charges are injected into an organic film between a hole injection electrode (anode) and an electron injection electrode (cathode), and the electrons and holes combine and then annihilate . Organic electroluminescent devices have the characteristics of low voltage, high brightness, wide viewing angle, etc., so organic electroluminescent devices have been developed rapidly in recent years. Among them, red organic electroluminescent devices have become a research hotspot due to their application prospects in monochrome display and white light modulation. [0003] For a long time, trivalent iridium complexes have been regarded as ideal organic electroluminescent materials by aca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52H01L51/54H01L51/56
CPCH10K85/342H10K50/121H10K50/11H10K71/00
Inventor 周亮张洪杰邓瑞平
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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